CN101741441A - Wireless terminal and antenna switching control method and device - Google Patents
Wireless terminal and antenna switching control method and deviceDownload PDFInfo
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Abstract
Description
Technical field
The present invention relates to communication technical field, particularly a kind of wireless terminal, antenna switching control method and device.
Background technology
Along with development of wireless communication devices, wireless terminal is from supporting speech business than low rate to the data service evolution of supporting higher rate, need adopt diversity technique can strengthen the performance of wireless terminal receiver on wireless terminal this moment, parse downstream signal better, improve the data downloading speed of wireless terminal.
Diversity receiving technology is to use No. two receivers to carry out signal simultaneously on a wireless terminal to receive, and the two-way receiver comprises a main collection receiver and a diversity receiver, the corresponding main antenna of wherein main collection receiver, the corresponding slave antenna of diversity receiver.Except receiver, also have in the wireless terminal one the tunnel with the matching used main collection transmitter of main collection receiver, this main collection transmitter is also corresponding to main antenna, wireless terminal outwards sends signal by main collection transmitter.Because wireless terminal is to the restriction (volume is less) of volume, main antenna and slave antenna are difficult to the performance that reaches identical, more common a kind of situation is that the efficient of slave antenna is lower by 3 to 6dB than the efficient of main antenna, when receiving signal more weak in the network by diversity receiver, lower slave antenna efficient can cause wireless terminal to be difficult to demodulate downstream signal, makes that the business in the network is difficult to insert this wireless terminal.Therefore, need collect the transmitting-receiving path of receiver the master, and on the reception path of diversity receiver radio-frequency (RF) switch is set, when receiving more weak signal, break-make by the control radio-frequency (RF) switch makes diversity receiver link to each other with main antenna, improves the receiving sensitivity of diversity receiver; When receiving stronger signal, the break-make by the control radio-frequency (RF) switch makes diversity receiver still link to each other with slave antenna, and main collection receiver still links to each other with main antenna.
The inventor finds in the research process to prior art, when adopting the break-make between radio-frequency (RF) switch receiver control and the antenna, main collection transmitter in the wireless terminal links to each other with radio-frequency (RF) switch all the time, be that radio-frequency (RF) switch is placed on the common transmit-receive path of main collection receiver and main collection transmitter, because main collection transmitter need not switch control, can increase the Insertion Loss of launching on the path and transmit through radio-frequency (RF) switch, increase the complete machine power loss of wireless terminal thus; And because the average transmit power that transmits is bigger, in the time of will passing through radio-frequency (RF) switch when transmitting, then require radio-frequency (RF) switch to the also corresponding increase of index that should average transmit power, promptly need to select for use the higher radio-frequency (RF) switch device of P-1 (1dB compression point) index, cause the radio-frequency (RF) switch device volume to increase the wireless terminal cost up thus.
Summary of the invention
The purpose of the embodiment of the invention is to provide a kind of wireless terminal, antenna switching control method and device, to reduce the power loss of wireless terminal, reduces cost.
For realizing the purpose of the embodiment of the invention, the embodiment of the invention provides following technical scheme:
A kind of wireless terminal, comprise main antenna, the main collection transmitter corresponding, main radio-frequency (RF) switch with main antenna, the output of described main collection transmitter is connected between the stiff end of described main antenna and described main radio-frequency (RF) switch, and the input of described main collection transmitter links to each other with base band.
Antenna switching control method in a kind of wireless terminal, on the transmitting-receiving path of main antenna and base band, main collection transmitter is connected between the stiff end of described main antenna and described main radio-frequency (RF) switch in the described wireless terminal, and described method comprises:
When the intensity level of the wireless network signal that receives is higher than the threshold value that sets in advance, controls main radio-frequency (RF) switch and be communicated with main collection receiver;
When the signal that will launch, described signal transfers to described main antenna by described main collection transmitter through the stiff end of described main radio-frequency (RF) switch and the path between the described main antenna.
Antenna switching control in a kind of wireless terminal, on the transmitting-receiving path of main antenna and base band, main collection transmitter is connected between the stiff end of described main antenna and described main radio-frequency (RF) switch in the described wireless terminal, and described device comprises:
Judging unit is used to judge the intensity level of the wireless network signal that receives;
Control unit, be used for when described intensity level is higher than the threshold value that sets in advance, controlling main radio-frequency (RF) switch is communicated with main collection receiver, and when the signal that will launch, control described signal and transfer to described main antenna through the stiff end of described main radio-frequency (RF) switch and the path between the described main antenna by described main collection transmitter.
The technical scheme that is provided by the above embodiment of the invention as seen, the output that to lead the collection transmitter in the embodiment of the invention is connected between the stiff end and antenna of main radio-frequency (RF) switch, the emission path of therefore main collection transmitter is not subjected to the control of main radio-frequency (RF) switch, it transmits and need not in transmission course through main radio-frequency (RF) switch, also need not through transmission channel if any the signal reception, therefore reduced the Insertion Loss on the emission path, the corresponding complete machine power loss that has reduced wireless terminal; And need not therefore to have reduced the P-1 index of main radio-frequency (RF) switch owing to transmit, make and to select for use volume less in the wireless terminal, lower-cost radio-frequency (RF) switch device through the transmission of main radio-frequency (RF) switch.
Description of drawings
Fig. 1 is the structural representation of wireless terminal first embodiment of the present invention;
Fig. 2 is the structural representation of wireless terminal second embodiment of the present invention;
Fig. 3 is the first embodiment flow chart of antenna switching control method of the present invention;
Fig. 4 is the second embodiment flow chart of antenna switching control method of the present invention;
Fig. 5 is the embodiment block diagram of antenna switching control of the present invention.
Embodiment
In order to make those skilled in the art person understand the present invention program better, and above-mentioned purpose of the present invention, feature and advantage can be become apparent more, the present invention is further detailed explanation below in conjunction with the drawings and specific embodiments.
The wireless terminal of the embodiment of the invention comprises main antenna, the main collection transmitter corresponding with main antenna, main radio-frequency (RF) switch.Wherein, the output of described main collection transmitter is connected between the stiff end of described main antenna and described main radio-frequency (RF) switch, and the input of described main collection transmitter links to each other with base band.
Because the emission path of main collection transmitter is not subjected to the control of main radio-frequency (RF) switch in the foregoing description, it transmits and need not in transmission course through main radio-frequency (RF) switch, also need not through transmission channel if any the signal reception, therefore reduced the Insertion Loss on the emission path, the corresponding complete machine power loss that has reduced wireless terminal.
The structural representation of wireless terminal first embodiment of the present invention as shown in Figure 1, this embodiment mainly shows the annexation between radio-frequency (RF) switch in the wireless terminal, the transmitter and receiver.
This wireless terminal comprises main antenna and slave antenna, wherein, main antenna links to each other with the stiff end of main radio-frequency (RF) switch, the selecting side of main radio-frequency (RF) switch links to each other with the input of main collection receiver, the output of main collection receiver links to each other with base band, and slave antenna links to each other with the selecting side of secondary radio-frequency (RF) switch, and the stiff end of secondary radio-frequency (RF) switch links to each other with the input of diversity receiver, the output of diversity receiver links to each other with base band, and the selecting side of main radio-frequency (RF) switch also links to each other with the selecting side of secondary radio-frequency (RF) switch.The input of main collection transmitter links to each other with base band, and the output of main collection transmitter is not connected to the selecting side of main radio-frequency (RF) switch, but is connected between the stiff end of main antenna and main radio-frequency (RF) switch.
By the wireless terminal shown in the foregoing description as can be known, the emission path of wherein main collection transmitter is connected between the stiff end of main antenna and main radio-frequency (RF) switch, therefore be not subjected to the control of main radio-frequency (RF) switch, it transmits and need not in transmission course through main radio-frequency (RF) switch, therefore reduced the Insertion Loss on the emission path, the corresponding complete machine power loss that has reduced wireless terminal; And need not therefore to have reduced the P-1 index of main radio-frequency (RF) switch owing to transmit, make and to select for use volume less in the wireless terminal, lower-cost radio-frequency (RF) switch device through the transmission of main radio-frequency (RF) switch.
The structural representation of wireless terminal second embodiment of the present invention as shown in Figure 2, this embodiment shows the detailed structure schematic diagram of the wireless terminal that comprises duplexer and filter.
This wireless terminal comprises main antenna and slave antenna, main antenna links to each other with an end of duplexer, the other end of duplexer is connected with the stiff end of main radio-frequency (RF) switch, the selecting side of main radio-frequency (RF) switch links to each other with the input of main collection receiver, the output of main collection receiver links to each other with base band, slave antenna links to each other with an end of diversity reception filter, the other end of diversity reception filter links to each other with the selecting side of secondary radio-frequency (RF) switch, the stiff end of secondary radio-frequency (RF) switch links to each other with the input of diversity receiver, the output of diversity receiver links to each other with base band, and the selecting side of main radio-frequency (RF) switch also links to each other with the selecting side of secondary radio-frequency (RF) switch.
The input of main collection transmitter links to each other with base band, and the output of main collection transmitter is not connected to the selecting side of main radio-frequency (RF) switch, but is connected on the duplexer between the stiff end of main antenna and main radio-frequency (RF) switch.Wherein, base band can be used as information source and is used to send the raw electrical signal that does not have through ovennodulation (carrying out frequency spectrum shift and conversion), this signal frequency is lower, has low-pass form, and this low frequency signal is transferred to transmitter after becoming radiofrequency signal after ovennodulation, frequency conversion and the filtering; The radiofrequency signal that receiver receives is received by base band after becoming low frequency signal after filtering, frequency conversion and the demodulation; Duplexer is positioned on the shared path of main collection receiver and main collection transmitter, its effect is that transmitting of wireless terminal is isolated with received signal, to guarantee Receiver And Transmitter operate as normal simultaneously, usually duplexer is made up of the band pass filter of two groups of different frequencies, the corresponding main collection receiver of the band pass filter of one class frequency, the corresponding main collection transmitter of the band pass filter of another class frequency is transferred to receiver to avoid transmitting of this machine; The diversity reception filter is generally band pass filter, is used to allow the signal of certain frequency range to pass through, and suppresses to be below or above signal, interference and the noise of this frequency range.
By the wireless terminal shown in the foregoing description as can be known, the emission path of wherein main collection transmitter is connected on the duplexer between the stiff end of main antenna and main radio-frequency (RF) switch, therefore be not subjected to the control of main radio-frequency (RF) switch, it transmits and need not in transmission course through main radio-frequency (RF) switch, therefore reduced the Insertion Loss on the emission path, the corresponding complete machine power loss that has reduced wireless terminal; And need not therefore to have reduced the P-1 index of main radio-frequency (RF) switch owing to transmit, make and to select for use volume less in the wireless terminal, lower-cost radio-frequency (RF) switch device through the transmission of main radio-frequency (RF) switch.
Need to prove, among second embodiment of the invention described above wireless terminal, the diversity reception filter is connected between the selecting side of slave antenna and secondary radio-frequency (RF) switch, and its effect is when slave antenna is communicated with diversity receiver, and the signal that slave antenna is received carries out being transferred to diversity receiver after the filtering.Thus can, this diversity reception filter can also be connected between the input of the stiff end of secondary radio-frequency (RF) switch and diversity receiver, as long as it carries out filtering to this signal before can being transferred to diversity receiver at the signal that slave antenna receives, so the embodiment of the invention does not limit the position of the diversity reception filter that can realize above-mentioned filter function.
Wireless terminal in the embodiment of the invention can be CDMA (Code DivisionMultiple Access, code division multiple access) wireless terminal, WCDMA (Wideband CodeDivision Multiple Access, Wideband Code Division Multiple Access (WCDMA)) wireless terminal, or the wireless terminal of CDMA/EVDO (Evolution Data Only) mixing.Wherein, the EVDO technology is the evolution form of CDMA technology, the main flow scheme that hybrid wireless terminal that the EVDO technology combines with CDMA technology adopts is called FTS (Full Time SimultaneousHybrid Diversity Receiver, full-time quarter synchronized mixes diversity receiver).The syndeton of the diversity transmitter in the above-mentioned terminal is consistent with the structure of previous embodiment, and when main radio-frequency (RF) switch switched to the state that is communicated with main collection receiver, the break-make of main collection transmitter path and the break-make of main radio-frequency (RF) switch were selected irrelevant.
A kind of first embodiment flow process of the antenna switching control method based on wireless terminal embodiment of the present invention as shown in Figure 3, on the transmitting-receiving path of main antenna and base band, main collection transmitter is connected between the stiff end of described main antenna and described main radio-frequency (RF) switch in the wireless terminal:
Step 301: when the intensity level of the wireless network signal that receives is higher than the threshold value that sets in advance, controls main radio-frequency (RF) switch and be communicated with main collection receiver.
Step 302: when the signal that will launch, signal transfers to main antenna by described main collection transmitter through the stiff end of main radio-frequency (RF) switch and the path between the main antenna.
Wherein, the signal of main collection transmitter emission needn't just can transfer to main antenna through main radio-frequency (RF) switch in transmission course, and the signal of promptly main collection transmitter emission transfers to main antenna through the path between main radio-frequency (RF) switch and the main antenna.
Wherein, wireless terminal can be the terminal that CDMA terminal or WCDMA terminal or CDMA mix with EVDO.
A kind of second embodiment flow process of the antenna switching control method based on wireless terminal embodiment of the present invention as shown in Figure 4, this embodiment shows main radio-frequency (RF) switch and secondary radio-frequency (RF) switch is operated, the process of switching with control main antenna and slave antenna:
Step 401: diversity receiver receives wireless network signal.
Step 402: whether the intensity level of judging this wireless network signal surpasses default threshold value, if then execution instep 403; Otherwise, execution instep 404.
The power of the wireless signal that the embodiment of the invention need receive according to diversity receiver triggers the handover operation of main radio-frequency (RF) switch and secondary radio-frequency (RF) switch.When promptly the wireless signal that receives at diversity receiver was strong, the break-make of control radio-frequency (RF) switch made main collection receiver be communicated with main antenna, and diversity receiver is communicated with slave antenna; When the wireless signal that receives at diversity receiver is more weak, the break-make of control radio-frequency (RF) switch, diversity receiver is communicated with main antenna, because the efficient of main antenna received signal is higher, therefore can improve the no line sensitivity of diversity receiver, make that more weak downstream signal can be by the correct demodulation of wireless terminal.
Step 403: the selecting side of controlling main radio-frequency (RF) switch is communicated with main collection receiver, and the selecting side of secondary radio-frequency (RF) switch is communicated with slave antenna.
Wherein, the signal of main collection transmitter emission needn't just can transfer to main antenna through main radio-frequency (RF) switch in transmission course, and the signal of promptly main collection transmitter emission transfers to main antenna through the path between described main radio-frequency (RF) switch and the main antenna.Further, when being connected duplexer between main antenna and the main radio-frequency (RF) switch, the signal of host transmitter emission is transferred to main antenna after through duplexer filtering.
Wherein, the terminal that can mix with EVDO for CDMA terminal or WCDMA terminal or CDMA of wireless terminal.
Step 404: control main radio-frequency (RF) switch and disconnect with main collection receiver, be communicated with diversity receiver, secondary radio-frequency (RF) switch and slave antenna disconnect, and are communicated with main antenna.
Corresponding with the embodiment of antenna switching control method of the present invention, the present invention also provides a kind of embodiment of antenna switching control, this installs in the applied wireless terminal, on the transmitting-receiving path of main antenna and base band, main collection transmitter is connected between the stiff end of described main antenna and described main radio-frequency (RF) switch.
The embodiment block diagram of antenna switching control of the present invention as shown in Figure 5, this device comprises: judging unit 510 and control unit 520.
Wherein, judging unit 510 is used to judge the intensity level of the wireless network signal that receives; Control unit 520 is used for when described intensity level is higher than the threshold value that sets in advance, controlling main radio-frequency (RF) switch is communicated with main collection receiver, and when the signal that will launch, control described signal and transfer to described main antenna through the stiff end of described main radio-frequency (RF) switch and the path between the described main antenna by described main collection transmitter.
Further, control unit 520 also is used for when described intensity level is lower than the threshold value that sets in advance, and controls main radio-frequency (RF) switch and is communicated with diversity receiver.
Description by the embodiment of the invention as can be known, in the embodiment of the invention main radio-frequency (RF) switch is arranged on the reception path of main collection receiver, and the output of main collection transmitter is connected between the stiff end and antenna of main radio-frequency (RF) switch, the emission path of therefore main collection transmitter is not subjected to the control of main radio-frequency (RF) switch, it transmits and need not in transmission course through main radio-frequency (RF) switch, therefore reduced the Insertion Loss on the emission path, the corresponding complete machine power loss that has reduced wireless terminal; And need not therefore to have reduced the P-1 index of main radio-frequency (RF) switch owing to transmit, make and to select for use volume less in the wireless terminal, lower-cost radio-frequency (RF) switch device through the transmission of main radio-frequency (RF) switch.
As seen through the above description of the embodiments, those skilled in the art can be well understood to the present invention and can realize by the mode that software adds essential general hardware platform.Based on such understanding, the part that technical scheme of the present invention contributes to prior art in essence in other words can embody with the form of software product, this computer software product can be stored in the storage medium, as ROM/RAM, magnetic disc, CD etc., comprise that some instructions are with so that a computer equipment (can be a personal computer, server, the perhaps network equipment etc.) carry out the described method of some part of each embodiment of the present invention or embodiment.
Though described the present invention by embodiment, those of ordinary skills know, the present invention has many distortion and variation and do not break away from spirit of the present invention, wish that appended claim comprises these distortion and variation and do not break away from spirit of the present invention.
Claims (10)
1. wireless terminal, comprise main antenna, the main collection transmitter corresponding, main radio-frequency (RF) switch with main antenna, it is characterized in that the output of described main collection transmitter is connected between the stiff end of described main antenna and described main radio-frequency (RF) switch, the input of described main collection transmitter links to each other with base band.
2. wireless terminal according to claim 1 is characterized in that, is connected duplexer between the stiff end of described main antenna and described main radio frequency selector switch, and the output of described main collection transmitter is connected to described duplexer.
3. wireless terminal according to claim 1 and 2 is characterized in that, described wireless terminal also comprises: corresponding with main antenna main collection receiver, slave antenna, diversity receiver and the secondary radio-frequency (RF) switch corresponding with slave antenna;
The selecting side of described main radio-frequency (RF) switch links to each other with the input of described main collection receiver, and the output of described main collection receiver links to each other with base band;
The selecting side of described secondary radio-frequency (RF) switch links to each other with slave antenna, and the stiff end of secondary radio-frequency (RF) switch links to each other with the input of diversity receiver, and the output of described diversity receiver links to each other with base band;
The selecting side of described main radio-frequency (RF) switch connects the selecting side of described secondary radio-frequency (RF) switch.
4. wireless terminal according to claim 3 is characterized in that, is connected the diversity reception filter between the selecting side of described slave antenna and described secondary radio-frequency (RF) switch; Or
Be connected the diversity reception filter between the stiff end of described secondary radio-frequency (RF) switch and the input of described diversity receiver.
5. antenna switching control method in the wireless terminal according to claim 1, it is characterized in that, on the transmitting-receiving path of main antenna and base band, main collection transmitter is connected between the stiff end of described main antenna and described main radio-frequency (RF) switch in the described wireless terminal, and described method comprises:
When the intensity level of the wireless network signal that receives is higher than the threshold value that sets in advance, controls main radio-frequency (RF) switch and be communicated with main collection receiver;
When the signal that will launch, described signal transfers to described main antenna by described main collection transmitter through the stiff end of described main radio-frequency (RF) switch and the path between the described main antenna.
6. method according to claim 5 is characterized in that, also comprises:
When described intensity level is lower than the threshold value that sets in advance, controls main radio-frequency (RF) switch and be communicated with diversity receiver.
7. method according to claim 6 is characterized in that, is connected duplexer between described main antenna and the main radio-frequency (RF) switch, and the described main antenna that transfers to is specially: by transferring to described main antenna after the described duplexer filtering.
8. according to the method shown in any one of the claim 5 to 7, it is characterized in that described wireless terminal comprises: the terminal that CDMA terminal or WCDMA terminal or CDMA mix with EVDO.
9. antenna switching control in the wireless terminal according to claim 1, it is characterized in that, on the transmitting-receiving path of main antenna and base band, main collection transmitter is connected between the stiff end of described main antenna and described main radio-frequency (RF) switch in the described wireless terminal, and described device comprises:
Judging unit is used to judge the intensity level of the wireless network signal that receives;
Control unit, be used for when described intensity level is higher than the threshold value that sets in advance, controlling main radio-frequency (RF) switch is communicated with main collection receiver, and when the signal that will launch, control described signal and transfer to described main antenna through the stiff end of described main radio-frequency (RF) switch and the path between the described main antenna by described main collection transmitter.
10. device according to claim 9 is characterized in that described control unit is further used for, and when described intensity level is lower than the threshold value that sets in advance, controls main radio-frequency (RF) switch and is communicated with diversity receiver.
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| CN200810177725ACN101741441A (en) | 2008-11-12 | 2008-11-12 | Wireless terminal and antenna switching control method and device |
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| CN200810177725ACN101741441A (en) | 2008-11-12 | 2008-11-12 | Wireless terminal and antenna switching control method and device |
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| CN103414507A (en)* | 2013-07-26 | 2013-11-27 | 北京小米科技有限责任公司 | Mobile terminal and method and device for switching antennas of mobile terminal |
| CN104079385A (en)* | 2013-03-28 | 2014-10-01 | 华为终端有限公司 | Method and device for adjusting diversity switch-on/off |
| CN104113357A (en)* | 2013-04-19 | 2014-10-22 | 宏达国际电子股份有限公司 | Handheld electronic device, wireless communication device and method for switching antennas thereof |
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| CN104079385A (en)* | 2013-03-28 | 2014-10-01 | 华为终端有限公司 | Method and device for adjusting diversity switch-on/off |
| CN104079385B (en)* | 2013-03-28 | 2017-11-07 | 华为终端有限公司 | A kind of method and device for adjusting diversity switch |
| CN104113357A (en)* | 2013-04-19 | 2014-10-22 | 宏达国际电子股份有限公司 | Handheld electronic device, wireless communication device and method for switching antennas thereof |
| CN103414507A (en)* | 2013-07-26 | 2013-11-27 | 北京小米科技有限责任公司 | Mobile terminal and method and device for switching antennas of mobile terminal |
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