技术领域Technical field
本发明涉及无线通信领域，具体涉及一种无线信息交流方法及无线通信设备。The present invention relates to the field of wireless communications, and in particular to a wireless information exchange method and wireless communication equipment.
背景技术Background technique
在TWS无线通信领域，两个耳机为了实现功能同步，让用户感觉到两个耳机是一体的，会在无线链路上进行信息交流。但是，无线链路上存在信号衰减与不确定干扰环境，导致信息交流出现错误，通信不稳定。In the field of TWS wireless communication, in order to achieve functional synchronization, the two earphones will make the user feel that the two earphones are integrated and will exchange information on the wireless link. However, there are signal attenuation and uncertain interference environments on wireless links, which lead to errors in information exchange and unstable communication.
传统的技术方案中，为了加强稳定性、减少重传率，可能会使用蓝牙协议规定的DM1包，该类型包采用FEC1/3进行纠错，以及GFSK调制方式。这种方式的性能一般，容易被干扰，抗信号衰减差。另一种传统技术是采用一段相关码进行通信，该相关码指标是1比特信息，即是或否。由于只使用一连串的相关码表达1比特信息，性能极高，重传率很低。但是，可表达的信息量很低。In traditional technical solutions, in order to enhance stability and reduce retransmission rates, DM1 packets specified by the Bluetooth protocol may be used. This type of packet uses FEC1/3 for error correction and GFSK modulation. The performance of this method is average, easy to be interfered, and has poor resistance to signal attenuation. Another traditional technology uses a correlation code to communicate. The correlation code indicator is 1 bit of information, that is, yes or no. Since only a series of correlation codes are used to express 1-bit information, the performance is extremely high and the retransmission rate is very low. However, the amount of information that can be expressed is low.
传统的技术方案存在以下弊端：Traditional technical solutions have the following disadvantages:
1、容易被干扰，抗信号衰减差；1. Easy to be interfered and has poor resistance to signal attenuation;
2、信息传输量低。2. The amount of information transmission is low.
发明内容Contents of the invention
基于上述现状，本发明的主要目的在于提供抗干扰和抗衰减能力强，且传输信息量较高的无线信息交流方法及无线通信设备。Based on the above status quo, the main purpose of the present invention is to provide a wireless information exchange method and wireless communication equipment with strong anti-interference and anti-attenuation capabilities and a high amount of transmitted information.
为实现上述目的，本发明采用的技术方案如下：In order to achieve the above objects, the technical solutions adopted by the present invention are as follows:
一种无线信息交流方法，用于无线通信设备，所述无线通信设备包括发送端和接收端，包括步骤：A wireless information exchange method for wireless communication equipment. The wireless communication equipment includes a sending end and a receiving end, including the steps:
S10：根据需要无线传输的功能信息数量、无线信道参数和预设的汉明距阈值制定相关码，所述相关码为二进制数序列，每个相关码用来表示需要无线传输的一种功能信息；S10: Develop a correlation code based on the amount of functional information that needs to be wirelessly transmitted, wireless channel parameters and the preset Hamming distance threshold. The correlation code is a binary number sequence, and each correlation code is used to represent a type of functional information that needs to be wirelessly transmitted. ;
S20：所述发送端保存所述相关码为第一组相关码，所述接收端保存所述相关码为第二组相关码；S20: The sending end saves the correlation code as a first group of correlation codes, and the receiving end saves the correlation code as a second group of correlation codes;
S30：所述发送端根据待发送的功能信息在所述第一组相关码中选择对应的相关码并发送；S30: The sending end selects the corresponding correlation code from the first group of correlation codes according to the function information to be sent and sends it;
S40：所述接收端接收所述发送端发送的相关码，并将接收到的相关码与所述第二组相关码分别进行相关计算，得到相关值组，并计算出最大相关值；S40: The receiving end receives the correlation code sent by the sending end, performs correlation calculations on the received correlation code and the second group of correlation codes respectively, obtains a correlation value group, and calculates the maximum correlation value;
S50：当所述最大相关值大于预设的相关阈值时，执行步骤S60；S50: When the maximum correlation value is greater than the preset correlation threshold, perform step S60;
S60：所述接收端执行所述最大相关值对应的相关码所表示的功能。S60: The receiving end performs the function represented by the correlation code corresponding to the maximum correlation value.
优选地，所述无线信道参数包括：所述信道环境造成的相关码比特位错误的概率、相关码正确识别概率，相关码误检测概率和相关码之间误识别概率。Preferably, the wireless channel parameters include: the probability of correlation code bit errors caused by the channel environment, the probability of correct identification of correlation codes, the probability of misdetection of correlation codes and the probability of misidentification between correlation codes.
优选地，所述步骤S10包括：Preferably, the step S10 includes:
根据所述无线传输的功能信息数量制定所述相关码的数量；The number of related codes is formulated according to the quantity of functional information transmitted wirelessly;
根据相关码的数量、所述信道环境造成的相关码比特位错误的概率、所述相关码正确识别概率、所述相关码误检测概率、所述相关码之间误识别概率和所述汉明距阈值制定所述相关码的长度和内容，所述相关码之间的汉明距大于所述预设的汉明距阈值。According to the number of correlation codes, the probability of correlation code bit errors caused by the channel environment, the probability of correct identification of the correlation codes, the probability of misdetection of the correlation codes, the probability of misidentification between the correlation codes and the Hamming The distance threshold determines the length and content of the correlation codes, and the Hamming distance between the correlation codes is greater than the preset Hamming distance threshold.
优选地，所述步骤S40中将接收到的相关码与所述第二组相关码分别进行相关计算包括：Preferably, performing correlation calculations on the received correlation codes and the second group of correlation codes in step S40 includes:
将接收到的相关码与所述第二组相关码中的每一个相关码分别进行卷积计算。Perform convolution calculation on the received correlation code and each correlation code in the second group of correlation codes respectively.
优选地，所述卷积计算包括将所述相关码与所述第二组相关码的各数据位分别进行异或非计算。Preferably, the convolution calculation includes performing exclusive NOR calculation on each data bit of the correlation code and the second group of correlation codes respectively.
优选地，所述预设的相关阈值根据所述信道环境造成的相关码比特位错误的概率、相关码正确识别概率，相关码误检测概率和相关码之间误识别概率设置。Preferably, the preset correlation threshold is set according to the probability of correlation code bit errors caused by the channel environment, the probability of correct identification of correlation codes, the probability of misdetection of correlation codes and the probability of misidentification between correlation codes.
优选地，还包括，部分功能信息采用蓝牙协议的DM1包传输。Preferably, it also includes that part of the function information is transmitted using DM1 packets of the Bluetooth protocol.
优选地，所述无线通信设备为蓝牙通信设备。Preferably, the wireless communication device is a Bluetooth communication device.
本发明还提供一种无线通信设备，包括发送端和接收端，The invention also provides a wireless communication device, including a sending end and a receiving end,
所述发送端包括第一存储器和发射模块，The sending end includes a first memory and a transmitting module,
所述第一存储器，用于存储至少一个相关码，所述相关码是根据所述无线通信设备需要传输的功能信息数量、信道参数和预设的汉明距阈值制定，所述相关码为二进制数序列，每个相关码用来表示所述无线通信设备需要传输的一种功能信息；The first memory is used to store at least one correlation code. The correlation code is formulated according to the amount of functional information that the wireless communication device needs to transmit, channel parameters and a preset Hamming distance threshold. The correlation code is binary. A sequence of numbers, each relevant code is used to represent a kind of functional information that the wireless communication device needs to transmit;
所述发射模块，用于根据待发送的功能信息在所述至少一个相关码中选择对应的相关码并发送；The transmitting module is configured to select a corresponding correlation code from the at least one correlation code according to the function information to be sent and send it;
所述接收端包括第二存储器、接收模块、相关计算模块、相关值比较模块、相关值阈值比较模块和执行模块，The receiving end includes a second memory, a receiving module, a correlation calculation module, a correlation value comparison module, a correlation value threshold comparison module and an execution module,
所述第二存储器，用于存储所述至少一个相关码，The second memory is used to store the at least one correlation code,
所述接收模块，用于接收所述发射模块发送的相关码；The receiving module is used to receive the correlation code sent by the transmitting module;
所述相关计算模块，用于根据所述接收模块接收的相关码和所述第二存储器存储的相关码分别进行相关计算，得到至少一个相关值；The correlation calculation module is configured to perform correlation calculations based on the correlation code received by the receiving module and the correlation code stored in the second memory, respectively, to obtain at least one correlation value;
所述相关值比较模块，用于根据所述至少一个相关值计算出最大相关值；The correlation value comparison module is used to calculate the maximum correlation value based on the at least one correlation value;
所述相关值阈值比较模块，用于将所述最大相关值与预设的相关值阈值进行比较，当所述最大相关值大于预设的相关阈值时，所述接收模块能够执行所述最大相关值对应的相关码所表示的功能。The correlation value threshold comparison module is used to compare the maximum correlation value with a preset correlation value threshold. When the maximum correlation value is greater than the preset correlation threshold, the receiving module can perform the maximum correlation The function represented by the correlation code corresponding to the value.
优选地，所述信道参数包括：所述信道环境造成的相关码比特位错误的概率、相关码正确识别概率，相关码误检测概率和相关码之间误识别概率。Preferably, the channel parameters include: the probability of bit errors of related codes caused by the channel environment, the probability of correct identification of related codes, the probability of misdetection of related codes and the probability of misidentification between related codes.
优选地，所述相关计算模块包括至少一个相关计算单元，Preferably, the correlation calculation module includes at least one correlation calculation unit,
所述至少一个相关计算单元分别根据所述接收模块接收的相关码和所述第二存储器存储的至少一个相关码进行相关计算，所述相关计算单元的数量与所述相关码的数量相同。The at least one correlation calculation unit performs correlation calculations respectively based on the correlation code received by the receiving module and the at least one correlation code stored in the second memory, and the number of the correlation calculation units is the same as the number of the correlation codes.
优选地，所述相关计算单元包括M个寄存器、M个卷积计算电路和M-1个累加器，其中，M等于所述相关码的长度值；Preferably, the correlation calculation unit includes M registers, M convolution calculation circuits and M-1 accumulators, where M is equal to the length value of the correlation code;
所述M个寄存器分别接收所述接收模块接收到的相关码的每位二进制数值；The M registers respectively receive each bit of the binary value of the relevant code received by the receiving module;
所述M个卷积计算电路接收所述M个寄存器接收的所述相关码的每位二进制数值，并与所述第二存储器存储的至少一个相关码的对应位二进制数值进行卷积相关计算；The M convolution calculation circuits receive each bit of the binary value of the correlation code received by the M registers, and perform convolution correlation calculation with the corresponding bit binary value of at least one correlation code stored in the second memory;
所述M-1个累加器分别对所述M个卷积计算电路的输出值进行累加，以输出所述接收模块接收的相关码和所述第二存储器存储的至少一个相关码的相关值。The M-1 accumulators respectively accumulate the output values of the M convolution calculation circuits to output the correlation value of the correlation code received by the receiving module and at least one correlation code stored in the second memory.
优选地，所述M个卷积计算电路为异或非电路，所述异或非电路接收所述M个寄存器接收的所述相关码的每位二进制数值和所述第二存储器存储的至少一个相关码的对应位二进制数值，并进行异或非计算。Preferably, the M convolution calculation circuits are exclusive NOR circuits, and the exclusive NOR circuit receives each bit of the binary value of the correlation code received by the M registers and at least one stored in the second memory. The corresponding binary value of the relevant code is calculated, and XOR is performed.
优选地，所述相关值比较模块包括多个比较器，所述比较器接收所述至少一个相关值，并计算出最大相关值。Preferably, the correlation value comparison module includes a plurality of comparators, the comparators receive the at least one correlation value and calculate the maximum correlation value.
优选地，所述相关值阈值比较模块包括一个比较器，所述比较器用于接收所述最大相关值，并与所述预设的相关阈值进行比较，当所述最大相关值大于预设的相关阈值时，所述接收端执行所述最大相关值对应的相关码的功能。Preferably, the correlation value threshold comparison module includes a comparator, the comparator is used to receive the maximum correlation value and compare it with the preset correlation threshold. When the maximum correlation value is greater than the preset correlation value, When the threshold is reached, the receiving end performs the function of the correlation code corresponding to the maximum correlation value.
优选地，所述发射模块为蓝牙发射模块，所述接收模块为蓝牙接收模块，所述发射模块还能够采用蓝牙协议的DM1包发送部分功能信息，所述接收模块还能够接收所述蓝牙协议的DM1包。Preferably, the transmitting module is a Bluetooth transmitting module, and the receiving module is a Bluetooth receiving module. The transmitting module can also use the DM1 packet of the Bluetooth protocol to send part of the functional information, and the receiving module can also receive the DM1 packet of the Bluetooth protocol. DM1 package.
优选地，所述无线通信设备是无线耳机对或无线音响对。Preferably, the wireless communication device is a pair of wireless headphones or a pair of wireless speakers.
优选地，所述无线耳机对是TWS蓝牙耳机，或，所述无线音响对是TWS蓝牙音响。Preferably, the pair of wireless earphones are TWS Bluetooth earphones, or the pair of wireless speakers are TWS Bluetooth speakers.
本发明的无线信息交流方法，根据需要无线传输的功能信息数量、无线信道参数和预设的汉明距阈值制定相关码，发射端选择其中一个相关码来发送预发送的功能信息，接收端并行多个相关码的相关计算，解析出发送端的功能信息，实现了无线信息交流的双方功能同步，相比传统技术一，加强了无线通信性能，抗干扰和抗衰减能力增强，相比传统技术二，可以交流更多的信息量。The wireless information exchange method of the present invention formulates relevant codes according to the amount of functional information that needs to be wirelessly transmitted, wireless channel parameters and the preset Hamming distance threshold. The transmitting end selects one of the relevant codes to send the pre-sent functional information, and the receiving end works in parallel. Related calculations of multiple correlation codes parse out the functional information of the sender, realizing functional synchronization of both parties in wireless information exchange. Compared with traditional technology one, it has enhanced wireless communication performance, enhanced anti-interference and anti-attenuation capabilities. Compared with traditional technology two, , can exchange more information.
本发明的无线通信设备中存储了定制的相关码，通过增加硬件资源，发射端选择其中一个相关码来发送预发送的功能信息，接收端并行多个相关码的相关计算，解析出发送端的功能信息，实现了无线信息交流的双方功能同步，抗干扰和抗衰减能力增强，且传输的信息量增加。Customized correlation codes are stored in the wireless communication device of the present invention. By adding hardware resources, the transmitter selects one of the correlation codes to send pre-sent function information, and the receiver performs related calculations on multiple correlation codes in parallel to analyze the functions of the sender. information, realizing the functional synchronization of both parties in wireless information exchange, enhancing the anti-interference and anti-attenuation capabilities, and increasing the amount of transmitted information.
本发明的其他有益效果，将在具体实施方式中通过具体技术特征和技术方案的介绍来阐述，本领域技术人员通过这些技术特征和技术方案的介绍，应能理解所述技术特征和技术方案带来的有益技术效果。Other beneficial effects of the present invention will be explained through the introduction of specific technical features and technical solutions in the specific embodiments. Those skilled in the art should be able to understand the advantages of the technical features and technical solutions through the introduction of these technical features and technical solutions. beneficial technical effects.
附图说明Description of the drawings
以下将参照附图对根据本发明的无线信息交流方法和无线通信设备的优选实施方式进行描述。图中：Preferred embodiments of the wireless information exchange method and wireless communication device according to the present invention will be described below with reference to the accompanying drawings. In the picture:
图1为根据本发明的一种优选实施方式的无线信息交流方法流程图；Figure 1 is a flow chart of a wireless information exchange method according to a preferred embodiment of the present invention;
图2为根据本发明的一种优选实施方式的无线通信设备结构示意图；Figure 2 is a schematic structural diagram of a wireless communication device according to a preferred embodiment of the present invention;
图3为根据本发明的一种优选实施方式的相关计算模块结构示意图；Figure 3 is a schematic structural diagram of a relevant computing module according to a preferred embodiment of the present invention;
图4为根据本发明的一种优选实施方式的相关计算单元电路结构图；Figure 4 is a circuit structure diagram of a relevant computing unit according to a preferred embodiment of the present invention;
图5为根据本发明的一种优选实施方式的相关值比较电路结构图；Figure 5 is a structural diagram of a correlation value comparison circuit according to a preferred embodiment of the present invention;
图6为根据本发明的一种优选实施方式的相关值阈值比较电路结构图；Figure 6 is a structural diagram of a correlation value threshold comparison circuit according to a preferred embodiment of the present invention;
图7为根据本发明的一种优选实施方式的无线通信设备的发送端结构示意图；Figure 7 is a schematic structural diagram of the transmitting end of a wireless communication device according to a preferred embodiment of the present invention;
图8为根据本发明的一种优选实施方式的无线通信设备的接收端结构示意图。Figure 8 is a schematic structural diagram of a receiving end of a wireless communication device according to a preferred embodiment of the present invention.
具体实施方式Detailed ways
图1为根据本发明的一种优选实施方式的无线信息交流方法，用于无线通信设备，该无线通信设备包括发送端和接收端，该方法包括：步骤S10：根据需要无线传输的功能信息数量、无线信道参数和预设的汉明距阈值制定相关码，其中的相关码可以是二进制数序列，每个相关码用来表示需要无线传输的一种功能信息；步骤S20：发送端保存所述相关码为第一组相关码，所述接收端保存所述相关码为第二组相关码；步骤S30：发送端根据待发送的功能信息在第一组相关码中选择对应的相关码并发送；步骤S40：接收端接收发送端发送的相关码，并将接收到的相关码与第二组相关码分别进行相关计算，得到相关值组，并计算出最大相关值；步骤S50：当最大相关值大于预设的相关阈值时，执行步骤S60：接收端执行最大相关值对应的相关码所表示的功能。其中，功能信息可以是提示音、发送端和接收端进通信交流、发送端和接收端进行音频同步、确定音频包是否接收正确等功能信息。Figure 1 is a wireless information exchange method according to a preferred embodiment of the present invention, which is used for wireless communication equipment. The wireless communication equipment includes a sending end and a receiving end. The method includes: Step S10: The amount of functional information to be wirelessly transmitted as needed , wireless channel parameters and the preset Hamming distance threshold to formulate a correlation code, where the correlation code can be a binary number sequence, and each correlation code is used to represent a type of functional information that requires wireless transmission; Step S20: The sending end saves the The correlation code is the first group of correlation codes, and the receiving end saves the correlation code as the second group of correlation codes; Step S30: The sending end selects the corresponding correlation code from the first group of correlation codes according to the function information to be sent and sends ; Step S40: The receiving end receives the correlation code sent by the sending end, and performs correlation calculations on the received correlation code and the second group of correlation codes respectively to obtain the correlation value group, and calculates the maximum correlation value; Step S50: When the maximum correlation When the value is greater than the preset correlation threshold, step S60 is performed: the receiving end performs the function represented by the correlation code corresponding to the maximum correlation value. Among them, the functional information may include prompt sounds, communication between the sender and the receiver, audio synchronization between the sender and the receiver, and determination of whether the audio packets are received correctly.
本发明的无线信息交流方法，根据需要无线传输的功能信息数量、无线信道参数和预设的汉明距阈值制定相关码，发射端选择其中一个相关码来发送预发送的功能信息，接收端并行多个相关码的相关计算，解析出发送端的功能信息，实现了无线信息交流的双方功能同步，相比传统技术一，加强了无线通信性能，抗干扰和抗衰减能力增强，相比传统技术二，可以交流更多的信息量。The wireless information exchange method of the present invention formulates relevant codes according to the amount of functional information that needs to be wirelessly transmitted, wireless channel parameters and the preset Hamming distance threshold. The transmitting end selects one of the relevant codes to send the pre-sent functional information, and the receiving end works in parallel. Related calculations of multiple correlation codes parse out the functional information of the sender, realizing functional synchronization of both parties in wireless information exchange. Compared with traditional technology one, it has enhanced wireless communication performance, enhanced anti-interference and anti-attenuation capabilities. Compared with traditional technology two, , can exchange more information.
在一实施方式中，无线信道参数可以包括：无线信道环境造成的相关码比特位错误的概率P、相关码正确识别概率Pc，相关码误检测概率Pe和相关码之间误识别概率Pr。In one embodiment, the wireless channel parameters may include: probability P of correlation code bit errors caused by the wireless channel environment, probability of correct identification of correlation codes Pc, probability of misdetection of correlation codes Pe and probability of misidentification between correlation codes Pr.
在具体实施方式中，相关码正确识别概率Pc，相关码误检测概率Pe和相关码之间误识别概率Pr可以根据无线信道环境造成的相关码比特位错误的概率P进行计算。例如，相关码长度为N bit，定义功能信息为发送端和接收端进入交流为一个相关码序列，预设的相关阈值为N-1，即，允许错一bit，那么相关码正确识别概率为：In a specific implementation, the correlation code correct identification probability Pc, the correlation code misdetection probability Pe and the misidentification probability between correlation codes Pr can be calculated based on the probability P of the correlation code bit error caused by the wireless channel environment. For example, the length of the correlation code is N bits, and the functional information is defined as a correlation code sequence between the transmitter and the receiver. The preset correlation threshold is N-1, that is, one bit error is allowed, then the probability of correct identification of the correlation code is :
Pc＝(1-P)M-1pPc = (1-P)M-1 p
相关码误检测概率为：The probability of false detection of relevant codes is:
Pe＝0.5N-1Pe =0.5N-1
相关码误检测到是指接收端在干扰或噪声里得到了相关码对应的信息，但实施上发送端并没有发送相关码。Correlation code error detection means that the receiving end obtains the information corresponding to the correlation code in interference or noise, but in practice the sending end does not send the correlation code.
相关码之间误识别概率Pr为：The misidentification probability Pr between related codes is:
Pr＝(1-P)PN-1Pr =(1-P)PN-1
从上述计算公式可以看出，相关码长度越大，被误检测概率会越低，另外，随着预设的相关阈值下降，可以得到更高的正确检测概率，同时，通过增加相关码长度和相关阈值，是可以减低相关码之间误识别概率。上述概率值是在知道相关码长度的情况下，给出的理论计算值。在本方案中，是根据设计需求统计出上述概率值，再根据上述概率值，以及相关码的数量和预设的汉明距阈值设计相关码的长度。It can be seen from the above calculation formula that the larger the correlation code length, the lower the probability of false detection. In addition, as the preset correlation threshold decreases, a higher probability of correct detection can be obtained. At the same time, by increasing the correlation code length and The correlation threshold can reduce the probability of misidentification between related codes. The above probability value is a theoretical calculation value given when the length of the relevant code is known. In this solution, the above probability value is calculated based on the design requirements, and then the length of the correlation code is designed based on the above probability value, the number of correlation codes, and the preset Hamming distance threshold.
所以，本方案根据信道环境造成的相关码比特位错误的概率、相关码正确识别概率，相关码误检测概率和相关码之间误识别概率来制定相关码长度和相关阈值。当然，也不能无限增加相关码长度，因为带宽资源与能量资源有限，所以也考虑带宽与能量资源制定最长相关码长度。Therefore, this solution formulates the correlation code length and correlation threshold based on the probability of correlation code bit errors caused by the channel environment, the probability of correct identification of correlation codes, the probability of misdetection of correlation codes and the probability of misidentification between correlation codes. Of course, the correlation code length cannot be increased infinitely because bandwidth resources and energy resources are limited, so bandwidth and energy resources are also considered to determine the longest correlation code length.
在一实施方式中，可以先根据需要无线传输的功能信息数量制定相关码的数量，通常，相关码的数量与需要无线传输的功能信息数量相等；再根据相关码的数量、信道环境造成的相关码比特位错误的概率、相关码正确识别概率、相关码误检测概率、相关码之间误识别概率和汉明距阈值制定相关码的长度和内容，相关码之间的汉明距应该大于预设的汉明距阈值。可以先根据已经确定的相关码的数量确定需要的相关码的最小长度；接下来，由于相关码长度越大，被误检测概率会越低，所以可以再结合无线信道环境造成的相关码比特位错误的概率P、相关码正确识别概率Pc，相关码误检测概率Pe和相关码之间误识别概率Pr的需要去扩展相关码的长度；同时，还要保证相关码之间的汉明距大于预设的汉明距阈值，所以，最后再根据汉明距要求去设计相关码的长度和内容。In one implementation, the number of correlation codes can be determined first according to the number of functional information that needs to be wirelessly transmitted. Usually, the number of correlation codes is equal to the number of functional information that needs to be wirelessly transmitted. Then, the number of correlation codes can be determined based on the number of correlation codes and the correlation caused by the channel environment. The probability of code bit errors, the probability of correct identification of related codes, the probability of misdetection of related codes, the probability of misidentification between related codes and the Hamming distance threshold determine the length and content of the related codes. The Hamming distance between related codes should be greater than the predetermined Set the Hamming distance threshold. You can first determine the minimum length of the required correlation code based on the number of determined correlation codes. Next, since the larger the length of the correlation code, the lower the probability of false detection, it can be combined with the correlation code bits caused by the wireless channel environment. The probability of error P, the probability of correct identification of related codes Pc, the probability of misdetection of related codes Pe and the probability of misidentification between related codes Pr need to extend the length of the related codes; at the same time, it is necessary to ensure that the Hamming distance between related codes is greater than The preset Hamming distance threshold, therefore, the length and content of the relevant code are finally designed according to the Hamming distance requirements.
现有技术是采用一段固定的相关码进行通信，与无线信道的参数、传输的功能信息数量均无关联，导致传输的信息量很低。本发明根据无线信道的参数、无线传输的功能信息数量和预设的汉明距阈值为每个传输的功能信息制定对应的相关码，在保证传输性能的同时，提高了传输的信息量。The existing technology uses a fixed correlation code for communication, which is not related to the parameters of the wireless channel or the amount of transmitted functional information, resulting in a very low amount of transmitted information. The present invention formulates corresponding correlation codes for each transmitted functional information based on the parameters of the wireless channel, the amount of wirelessly transmitted functional information and the preset Hamming distance threshold, thereby ensuring the transmission performance while increasing the amount of transmitted information.
通常，汉明距是指两个相关码中不同位的数量，使得该数量大于预设的汉明距阈值，从而满足抗干扰需求。预设的汉明距阈值通常是根据无线通信设备的软硬件条件测试出来的满足某些需求的阈值。例如，可以是64。Generally, the Hamming distance refers to the number of different bits in two related codes, such that the number is greater than the preset Hamming distance threshold, thereby meeting the anti-interference requirements. The preset Hamming distance threshold is usually a threshold that is tested based on the software and hardware conditions of the wireless communication device to meet certain requirements. For example, it could be 64.
在一实施方式中，步骤S40可以是将接收到相关码与第二组相关码中的每一个相关码分别进行卷积计算，从而计算出相关值组。在具体实施方式中，卷积计算可以是对上述相关码的各数据位进行异或非计算。通过异或非计算出接收端接收到的相关码和第二组相关码中各数据位中相同的数位，相同位数最多的会输出最大相关值，经过相关值比较之后就会输出该最大相关值，当该最大相关值大于预设的相关值阈值时，接收端会执行对应相关码的功能。In one embodiment, step S40 may be to perform convolution calculation on the received correlation code and each correlation code in the second group of correlation codes respectively, thereby calculating the correlation value group. In a specific implementation, the convolution calculation may be an XOR-NOT calculation on each data bit of the above-mentioned correlation code. The same digits in each data bit in the correlation code received by the receiving end and the second group of correlation codes are calculated through XOR. The one with the most identical digits will output the maximum correlation value. After the correlation value is compared, the maximum correlation will be output. value, when the maximum correlation value is greater than the preset correlation value threshold, the receiving end will execute the function of the corresponding correlation code.
在一实施方式中，预设的相关阈值可以根据无线信道环境造成的相关码比特位错误的概率P、相关码正确识别概率Pc，相关码误检测概率Pe和相关码之间误识别概率Pr去设置的。由于随着预设的相关阈值下降，可以得到更高的正确检测概率，所以，可以设置相对较低的相关阈值，但为保证准确性，也不能无限下降相关阈值。In one embodiment, the preset correlation threshold can be determined based on the probability P of correlation code bit errors caused by the wireless channel environment, the probability of correct identification of correlation codes Pc, the probability of misdetection of correlation codes Pe and the probability of misidentification between correlation codes Pr. set. Since as the preset correlation threshold decreases, a higher probability of correct detection can be obtained, so a relatively low correlation threshold can be set, but to ensure accuracy, the correlation threshold cannot be lowered infinitely.
在一实施方式中，本发明的无线信息交流方法可以结合蓝牙协议进行使用，把相对重要的信息由本发明的无线信息交流方法传输，把相对次要的信息由采用蓝牙协议的DM1包传输，信息传输量增加，抗干扰能力强，且可以加强稳定性减少重传率。In one embodiment, the wireless information exchange method of the present invention can be used in conjunction with the Bluetooth protocol. Relatively important information is transmitted by the wireless information exchange method of the present invention, and relatively minor information is transmitted by DM1 packets using the Bluetooth protocol. The transmission volume is increased, the anti-interference ability is strong, and the stability can be enhanced to reduce the retransmission rate.
在一实施方式中，执行本发明的无线信息交流方法的无线通信设备可以是蓝牙通信设备。也可以是其他无线通信设备。In one embodiment, the wireless communication device that performs the wireless information exchange method of the present invention may be a Bluetooth communication device. It can also be other wireless communication devices.
本发明还提供一种无线通信设备，图2为根据本发明的一种优选实施方式的无线通信设备结构示意图，包括发送端70和接收端80，发送端70包括第一存储器701和发射模块702，接收端80包括第二存储器801、接收模块802、相关计算模块803、相关值比较模块804、相关值阈值比较模块805和执行模块806。The present invention also provides a wireless communication device. Figure 2 is a schematic structural diagram of a wireless communication device according to a preferred embodiment of the present invention, including a sending end 70 and a receiving end 80. The sending end 70 includes a first memory 701 and a transmitting module 702. , the receiving end 80 includes a second memory 801, a receiving module 802, a correlation calculation module 803, a correlation value comparison module 804, a correlation value threshold comparison module 805 and an execution module 806.
第一存储器701中存储至少一个相关码，该相关码是根据无线通信设备需要传输的功能信息数量、信道参数和预设的汉明距阈值制定，相关码为二进制数序列，每个相关码用来表示无线通信设备需要传输的功能信息；发射模块702根据预发送的功能信息在至少一个相关码中选择对应的相关码并发送。The first memory 701 stores at least one correlation code. The correlation code is formulated based on the amount of functional information that the wireless communication device needs to transmit, channel parameters and the preset Hamming distance threshold. The correlation code is a binary number sequence, and each correlation code is to represent the function information that the wireless communication device needs to transmit; the transmitting module 702 selects the corresponding correlation code from at least one correlation code according to the pre-sent function information and sends it.
第二存储器801中也存储了上述的至少一个相关码；接收模块802接收发射模块702发送的相关码；相关计算模块803根据接收模块802接收到的相关码和第二存储器801存储的相关码分别进行相关计算，得到至少一个相关值；相关值比较模块804根据该至少一个相关值计算出最大相关值；相关值阈值比较模块805将该最大相关值与预设的相关值阈值进行比较，当最大相关值大于预设的相关阈值时，执行模块806能够执行最大相关值对应的相关码所表示的功能，从而完成发送端和接收端的功能信息交流，实现了发送端和接收端的功能同步。The second memory 801 also stores at least one of the above-mentioned correlation codes; the receiving module 802 receives the correlation code sent by the transmitting module 702; the correlation calculation module 803 calculates the correlation code according to the correlation code received by the receiving module 802 and the correlation code stored in the second memory 801. Correlation calculation is performed to obtain at least one correlation value; the correlation value comparison module 804 calculates the maximum correlation value based on the at least one correlation value; the correlation value threshold comparison module 805 compares the maximum correlation value with a preset correlation value threshold. When the maximum correlation value is When the correlation value is greater than the preset correlation threshold, the execution module 806 can execute the function represented by the correlation code corresponding to the maximum correlation value, thereby completing the exchange of functional information between the sending end and the receiving end, and realizing functional synchronization between the sending end and the receiving end.
本发明的无线通信设备中存储了定制的相关码，通过增加硬件资源，发射端选择其中一个相关码来发送预发送的功能信息，接收端并行多个相关码的相关计算，解析出发送端的功能信息，实现了无线信息交流的双方功能同步，抗干扰和抗衰减能力增强，且传输的信息量增加。Customized correlation codes are stored in the wireless communication device of the present invention. By adding hardware resources, the transmitter selects one of the correlation codes to send pre-sent function information, and the receiver performs related calculations on multiple correlation codes in parallel to analyze the functions of the sender. information, realizing the functional synchronization of both parties in wireless information exchange, enhancing the anti-interference and anti-attenuation capabilities, and increasing the amount of transmitted information.
在一实施方式中，制定相关码中依据的信道参数可以包括信道环境造成的相关码比特位错误的概率、相关码正确识别概率，相关码误检测概率和相关码之间误识别概率。In one embodiment, the channel parameters based on which the correlation codes are formulated may include the probability of correlation code bit errors caused by the channel environment, the probability of correct identification of correlation codes, the probability of misdetection of correlation codes and the probability of misidentification between correlation codes.
在具体实施方式中，可以根据无线通信设备传输的功能信息数量制定相关码的数量；再根据相关码的数量、信道参数可以包括信道环境造成的相关码比特位错误的概率、相关码正确识别概率，相关码误检测概率和相关码之间误识别概率和预设的汉明距阈值制定相关码的长度和内容，相关码之间的汉明距大于预设的汉明距阈值。根据上述方法制定对应的相关码，在保证传输性能的同时，提高了传输的信息量。In a specific implementation, the number of relevant codes can be determined according to the amount of functional information transmitted by the wireless communication device; and then according to the number of relevant codes and channel parameters, the probability of relevant code bit errors caused by the channel environment and the probability of correct identification of the relevant codes can be included , the probability of false detection of related codes and the probability of misidentification between related codes and the preset Hamming distance threshold determine the length and content of the related codes, and the Hamming distance between related codes is greater than the preset Hamming distance threshold. The corresponding correlation code is formulated according to the above method, which not only ensures the transmission performance, but also increases the amount of transmitted information.
在一实施方式中，如图3所示，相关计算模块803可包括至少一个相关计算单元，例如，可以是N个，N大于等于1，该N个相关计算单元分别根据接收模块接收的相关码和第二存储器存储的至少一个相关码进行相关计算，相关计算单元的数量与第二存储器存储的至少一个相关码的数量相同。至少一个相关计算单元同时对接收到的相关码进行多组相关计算，以最快计算出最大相关值，降低了通信延迟，提升用户体验。In one embodiment, as shown in Figure 3, the correlation calculation module 803 may include at least one correlation calculation unit, for example, there may be N, N is greater than or equal to 1, and the N correlation calculation units are respectively based on the correlation code received by the receiving module. Correlation calculation is performed with at least one correlation code stored in the second memory, and the number of correlation calculation units is the same as the number of at least one correlation code stored in the second memory. At least one correlation calculation unit simultaneously performs multiple sets of correlation calculations on the received correlation codes to calculate the maximum correlation value as quickly as possible, reducing communication delays and improving user experience.
在一实施方式中，如图4所示，相关计算单元可以包括M个寄存器、M个卷积计算电路和M-1个累加器，其中，M等于相关码的长度值。其中，M个寄存器分别接收接收模块接收到的相关码的每位二进制数值；M个卷积计算电路接收M个寄存器存储的相关码的每位二进制数值，并与和第二存储器存储的至少一个相关码的对应位二进制数值进行卷积相关计算；M-1个累加器分别对M个卷积计算电路的输出值进行累加，以输出接收模块接收的相关码和第二存储器存储的至少一个相关码的相关值。In one implementation, as shown in FIG. 4 , the correlation calculation unit may include M registers, M convolution calculation circuits and M-1 accumulators, where M is equal to the length value of the correlation code. Among them, M registers respectively receive each bit of the binary value of the correlation code received by the receiving module; M convolution calculation circuits receive each bit of the binary value of the correlation code stored in the M registers, and combine it with at least one bit of the correlation code stored in the second memory. The corresponding bit binary value of the correlation code performs convolution correlation calculation; M-1 accumulators respectively accumulate the output values of the M convolution calculation circuits to output the correlation code received by the receiving module and at least one correlation stored in the second memory code related value.
在具体实施方式中，M个卷积计算电路可以为异或非电路(XOR-NOT)，该异或非电路接收M个寄存器接收的相关码的每位二进制数值，并与第二存储器存储的至少一个相关码的对应位二进制数值进行异或非计算。In a specific implementation, the M convolution calculation circuits may be XOR-NOT circuits. The XOR-NOT circuit receives each bit of the binary value of the correlation code received by the M registers, and compares it with the binary value stored in the second memory. The corresponding bit binary value of at least one relevant code is XORed and not calculated.
在一实施方式中，如图5所示，相关值比较模块804包括多个比较器，多个比较器接收相关值计算模块输出的至少一个相关值，并计算出最大相关值。In one implementation, as shown in FIG. 5 , the correlation value comparison module 804 includes multiple comparators. The multiple comparators receive at least one correlation value output by the correlation value calculation module and calculate the maximum correlation value.
在一实施方式中，如图6所示，相关值阈值比较模块805可包括一个比较器，该比较器接收最大相关值，并与预设的相关阈值进行比较，当最大相关值大于预设的相关阈值时，接收端执行最大相关值对应的相关码的功能，完成发送端和接收端的功能信息交流。In one embodiment, as shown in Figure 6, the correlation value threshold comparison module 805 may include a comparator that receives the maximum correlation value and compares it with a preset correlation threshold. When the maximum correlation value is greater than the preset When the correlation threshold is reached, the receiving end executes the function of the correlation code corresponding to the maximum correlation value, completing the exchange of functional information between the sending end and the receiving end.
在具体实施方式中，预设的相关阈值是可以根据信道环境造成的相关码比特位错误的概率、相关码正确识别概率，相关码误检测概率和相关码之间误识别概率设置的。In a specific implementation, the preset correlation threshold can be set based on the probability of correlation code bit errors caused by the channel environment, the probability of correct identification of correlation codes, the probability of misdetection of correlation codes and the probability of misidentification between correlation codes.
在一实施方式中，本发明的无线通信设备的发射模块可以为蓝牙发射模块，接收模块可以为蓝牙接收模块，其中，发射模块还能够采用蓝牙协议的DM1包发送部分功能信息，接收模块还能够接收所述蓝牙协议的DM1包。当接收到有效的功能信息数据包时，执行模块806执行该功能信息数据包对应的功能。通常，可把相对重要的信息由本发明的方案传输，把相对次要的信息由采用蓝牙协议的DM1包传输，信息传输量增加，抗干扰能力强，且可以加强稳定性减少重传率。In one embodiment, the transmitting module of the wireless communication device of the present invention can be a Bluetooth transmitting module, and the receiving module can be a Bluetooth receiving module. The transmitting module can also use the DM1 packet of the Bluetooth protocol to send part of the functional information, and the receiving module can also use the DM1 packet of the Bluetooth protocol to send part of the functional information. Receive the DM1 packet of the Bluetooth protocol. When receiving a valid function information data packet, the execution module 806 executes the function corresponding to the function information data packet. Generally, relatively important information can be transmitted by the solution of the present invention, and relatively minor information can be transmitted by DM1 packets using the Bluetooth protocol. The information transmission volume is increased, the anti-interference ability is strong, and the stability can be enhanced to reduce the retransmission rate.
在一实施方式中，本发明的无线通信设备可以是无线耳机对或无线音响对。其中的发送端和接收端分别是第一无线耳机和第二无线耳机，或，第一无线音响和第二无线音响。In one embodiment, the wireless communication device of the present invention may be a pair of wireless headphones or a pair of wireless speakers. The sending end and the receiving end are respectively a first wireless earphone and a second wireless earphone, or a first wireless speaker and a second wireless speaker.
在具体实施方式中，无线耳机对可以是TWS蓝牙耳机，无线音响对可以是TWS蓝牙音响。其中的第一无线耳机和第二无线耳机是TWS蓝牙耳机，第一无线音响和第二无线音响可以是TWS蓝牙音响。In a specific implementation, the pair of wireless earphones may be TWS Bluetooth earphones, and the pair of wireless speakers may be TWS Bluetooth speakers. The first wireless earphone and the second wireless earphone are TWS Bluetooth earphones, and the first wireless speaker and the second wireless speaker can be TWS Bluetooth speakers.
图7中示出了发送端的结构示意图，图8中示出了接收端的结构示意图，接下来以图7和图8为例说明本发明技术方案的工作过程。Figure 7 shows a schematic structural diagram of the sending end, and Figure 8 shows a schematic structural diagram of the receiving end. Next, Figures 7 and 8 are used as examples to illustrate the working process of the technical solution of the present invention.
首先，根据无线通信设备需要传输的功能信息数量、信道参数和预设的汉明距阈值制定相关码，确保各个码之间的汉明距大于预设的汉明距阈值，然后将相关码存入发送端和接收端的存储器。First, relevant codes are formulated based on the amount of functional information that the wireless communication device needs to transmit, channel parameters and the preset Hamming distance threshold, ensuring that the Hamming distance between each code is greater than the preset Hamming distance threshold, and then the relevant codes are stored into the memory of the sender and receiver.
当发送端需要发送某一功能信息时，例如提示音，发送端的调制电路把相关码数字流调制成特定的时域波形，再通过RF发射电路进行DA转换、上变频和功率放大等，再发送出去。When the sending end needs to send certain functional information, such as a prompt tone, the modulation circuit at the sending end modulates the relevant code stream into a specific time domain waveform, and then performs DA conversion, upconversion, power amplification, etc. through the RF transmitting circuit, and then sends go out.
接收端的RF接收电路对接收到的信号进行AD转换、下变频和降噪处理后至解调电路，解调电路把特定的时域波形解调成数字信号，通常是数字比特流或者带有幅度信息的比特流；相关计算电路将解调信号与本地的所有相关码做卷积相关计算得到一组相关值，通常，当接收到与本地相同的相关码，卷积输出出现峰值；之后，相关值比较器比较各个相关极端电路的输出幅度，得到最大相关值，并把最大值输出到相关阈值比较器；相关阈值比较器将最大相关值与预设的相关阈值进行比较，如果大于预设的相关阈值，则说明已经检测到某一相关码，接收端的执行电路便执行该相关码对应的功能，从而实现了发送端和接收端的功能同步。The RF receiving circuit at the receiving end performs AD conversion, down-conversion and noise reduction processing on the received signal before sending it to the demodulation circuit. The demodulation circuit demodulates the specific time domain waveform into a digital signal, usually a digital bit stream or with amplitude. Bit stream of information; the correlation calculation circuit performs convolution correlation calculation on the demodulated signal with all local correlation codes to obtain a set of correlation values. Usually, when the same correlation code as the local one is received, the convolution output peaks; after that, the correlation The value comparator compares the output amplitude of each relevant extreme circuit to obtain the maximum correlation value, and outputs the maximum value to the correlation threshold comparator; the correlation threshold comparator compares the maximum correlation value with the preset correlation threshold. If it is greater than the preset The correlation threshold indicates that a certain correlation code has been detected, and the execution circuit of the receiving end executes the function corresponding to the correlation code, thereby achieving functional synchronization between the sending end and the receiving end.
需要说明的是，本发明中采用步骤编号(字母或数字编号)来指代某些具体的方法步骤，仅仅是出于描述方便和简洁的目的，而绝不是用字母或数字来限制这些方法步骤的顺序。本领域的技术人员能够明了，相关方法步骤的顺序，应由技术本身决定，不应因步骤编号的存在而被不适当地限制。It should be noted that the use of step numbers (letter or numerical numbers) in the present invention to refer to certain specific method steps is only for the purpose of convenience and conciseness of description, and is in no way limited to these method steps by letters or numbers. Order. Those skilled in the art can understand that the order of relevant method steps should be determined by the technology itself and should not be unduly limited due to the existence of step numbers.
本领域的技术人员能够理解的是，在不冲突的前提下，上述各优选方案可以自由地组合、叠加。Those skilled in the art can understand that, provided there is no conflict, the above-mentioned preferred solutions can be freely combined and superimposed.
应当理解，上述的实施方式仅是示例性的，而非限制性的，在不偏离本发明的基本原理的情况下，本领域的技术人员可以针对上述细节做出的各种明显的或等同的修改或替换，都将包含于本发明的权利要求范围内。It should be understood that the above-described embodiments are only exemplary and not restrictive. Without departing from the basic principles of the present invention, those skilled in the art can make various obvious or equivalent modifications to the above-described details. Modifications or substitutions will be included in the scope of the claims of the present invention.
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| CN202110855788.4ACN114079539B (en) | 2021-07-28 | 2021-07-28 | Wireless information communication method and wireless communication equipment |
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