Summary of the invention
The present invention is directed at least solve one of the technical problems existing in the prior art.For this purpose, the present invention needs to provide oneThe resource fairness distribution method and its optimization method of kind wireless communication energy simultaneous interpretation.
The control method of embodiment of the present invention, for controlling radio communication base station, which is characterized in that the control methodInclude:
Estimate the channel of current time slots to obtain the letter of current time slots using the channel information and pilot signal of passing time slotRoad information, the channel information of the current time slots are used to describe the transmission characteristic of the channel of the current time slots；
The radio communication base station is controlled using the transmission initial data of the current time slots to obtain the first receptionSignal；
The pilot signal is updated using the initial data to obtain the long pilot signal of the current time slots；And
The current time slots are reevaluated using the long pilot signal and the first reception signal of the current time slotsTo obtain the update channel information of the current time slots, the update channel information of the current time slots changes channel information for updatingThe channel information of next time slot is estimated for the channel information of the passing time slot of next time slot.
In some embodiments, the control method includes updating the set of the activation user under current time slots.
In some embodiments, the letter of channel information and pilot signal the estimation current time slots using passing time slotRoad includes following sub-step with the channel information for obtaining current time slots:
Pilot signal described in transmission using the current time slots is to obtain the second reception signal；
Become using the channel that the channel information of the second reception signal and the passing time slot obtains the current time slotsChange the information of part；
The information of the channel variation part of current time slots described in Linear Estimation is to obtain the channel variation of the current time slotsPartial fading coefficients；And
The channel information of current time slots is reconstructed using the channel information and the fading coefficients of passing time slot.
In some embodiments, the information of the channel variation part of the Linear Estimation current time slots includes based on minimumThe Linear Estimation of mean-square error criteria.
In some embodiments, the control radio communication base station is former using the transmission of the current time slotsBeginning data transmit initial data including the use of channel coding or hybrid automatic repeat-request.
In some embodiments, the control radio communication base station is former using the transmission of the current time slotsBeginning data include receiving signal to described first to carry out Data Detection to obtain initial data.
In some embodiments, the Data Detection includes the Data Detection based on minimum mean square error criterion.
In some embodiments, described to receive signal weight using the long pilot signal of the current time slots and described firstThe channel information of current time slots described in new estimation includes the channel estimation based on minimum mean square error criterion.
The control device of embodiment of the present invention, for controlling radio communication base station, which is characterized in that the control deviceIncluding the first estimation module, control module, the second estimation module of update module grade.First estimation module is used for described firstEstimation module is used for the channel information of channel information and pilot signal the estimation current time slots using passing time slot, the control mouldBlock is for controlling the radio communication base station using the transmission initial data of the current time slots to obtain the first reception letterNumber, update module described in the update module is used to update the pilot signal using the initial data described current to obtainThe long pilot signal of time slot, second estimation module receive letter using the long pilot signal of the current time slots and described firstNumber the channel information of the current time slots is reevaluated to obtain the update channel information of the current time slots.
The base station system of embodiment of the present invention includes radio communication base station and control device.
In some embodiments, the control device further includes obtaining module.The acquisition module is described for obtainingThe set of the activation user of the radio communication base station service of current time slots.
In some embodiments, first estimation module includes transmission module, the first computing module, the second calculating mouldBlock and third computing module.The transmission module is for pilot signal described in the transmission using the current time slots to obtainSecond receives signal, the channel information that first computing module is used to receive signal and the passing time slot using described secondObtain the information of the channel variation part of the current time slots.Second computing module is for current time slots described in Linear EstimationChannel variation part information to obtain the fading coefficients of the channel variation part of the current time slots, the third calculates mouldBlock is used to reconstruct the channel information of current time slots using the channel information and the fading coefficients of passing time slot.
Control method and control device in embodiment of the present invention utilize the correlation between the channel of adjoining time slotChannel estimation is carried out, and updates pilot signal using initial data and obtains long pilot signal, and using the long pilot signal to letterRoad carries out quadratic estimate, can reduce pilot pollution, improve the accuracy of channel estimation.
Specific embodiment
Embodiments of the present invention are described below in detail, the example of the embodiment is shown in the accompanying drawings, wherein from beginningSame or similar element or element with the same or similar functions are indicated to same or similar label eventually.
It is exemplary below with reference to the embodiment of attached drawing description, for explaining only the invention, and cannot understandFor limitation of the present invention.
Referring to Fig. 1, the control method of embodiment of the present invention is for controlling radio communication base station.Control method include withLower step:
S12: estimate the channel of current time slots to obtain current time slots using the channel information and pilot signal of passing time slotChannel information, the channel informations of the current time slots is used to describe the transmission characteristic of the channel of the current time slots；
S14: the radio communication base station is controlled using the transmission initial data of the current time slots to obtain firstReceive signal；
S16: the pilot signal is updated using the initial data to obtain the long pilot signal of the current time slots；And
S18: when reevaluating described current using the long pilot signal and the first reception signal of the current time slotsThe channel information of gap is to obtain the update channel information of the current time slots, and the update channel information of the current time slots is for moreThe channel information of the passing time slot of the new lower time slot of iteration is to estimate the channel information of next time slot.
Referring to Fig. 2, the control method of embodiment of the present invention can be real by the control device 10 of embodiment of the present inventionIt applies, and for controlling radio communication base station 20.
In some embodiments, control device 10 can constitute base station system 100 with radio communication base station 20.
Control device 10 includes the first estimation module 12, control module 14, update module 16 and the second estimation module 18.TheOne estimation module 12 is used for the channel information of channel information and pilot signal the estimation current time slots using passing time slot.Control mouldBlock 14 controls the radio communication base station using the transmission initial data of the current time slots to obtain the first reception signal.Update module 16 is used to update the pilot signal using the initial data to obtain the long pilot signal of the current time slots.Second estimation module 18 is received for second estimation module using the long pilot signal of the current time slots and described firstSignal reevaluates the channel information of the current time slots to obtain the update channel information of the current time slots.
In other words, step S12 can be realized that step S14 can be realized by control module 14 by the first estimation module 12,Step S16 can be realized that step S18 can be realized by the second estimation module 18 by update module 16.
In wireless communication procedure, there are certain correlations, especially base for the channel information between adjacent transmission time slotWhen mobile terminal in system of standing 100 is in static or low mobility state, channel information between neighboring transmission time slotCorrelation is stronger.Therefore, the control method of embodiment of the present invention, control device 10 and base station system 100 utilize passing time slotChannel information and pilot signal estimate the channel informations of current time slots, the channel of available accurate current time slotsInformation.In addition, updating pilot signal with initial data again obtains long pilot signal, when reevaluating current using long pilot signalThe channel information of gap, and the channel information of the passing time slot as next time slot can reduce pilot pollution, further increase letterThe accuracy of road information estimation.This is because mutually orthogonal pilot signal quantity is limited, when the shifting for being in communications statusWhen the quantity of dynamic terminal is more, it may need to carry out channel estimation, pilot signal using identical pilot signal between neighboring communityMultiplexing influence channel estimation accuracy.After updating pilot signal, long pilot signal is more compared with original pilot signalThe sequence of one section of initial data, so that the correlation between long pilot signal and original pilot signal reduces, even if moreIn the case that a mobile terminal is multiplexed original pilot signal, since the initial data of each mobile terminal transmission is different, finallyThe long pilot signal constituted is also corresponding different, therefore will not interfere to the channel estimation of radio communication base station 20.
The channel information of any one time slot is used to describe the transmission characteristic i.e. channel response of the channel of corresponding time slot.SignalWhen transmitting in the channel, the interference of multipath fading, noise will receive, therefore, it is necessary to channel information, that is, channels to any time slotResponse is accurately estimated, to facilitate radio communication base station 20 correctly to demodulate the initial data of mobile terminal transmission.
Passing time slot refers to the preceding n time slot of current time slots, preceding n time slot can be current time slots previous time slot orPreceding multiple time slots of person's current time slots.
Referring to Fig. 3, being intended to carry out channel estimation twice to the channel in corresponding time slot in any time slot of uplinkAnd the update of a pilot signal.Original pilot signal is identical in the frame structure of any time slot, each slot transmissionInitial data and obtained updated long pilot signal be then different.
Referring to Fig. 4, in some embodiments, control method is further comprising the steps of:
S11: the set of the activation user of the radio communication base station service of the current time slots is obtained.
Referring to Fig. 5, the control device 10 of embodiment of the present invention includes obtaining module 11.Module 11 is obtained for obtainingThe set for the activation user that the radio communication base station 20 of current time slots services.
Since radio communication base station 20 will receive the communication request of multiple users under same time slot, user under the time slotCommunication request number be even larger than radio communication base station 20 can load maximum communication quantity.Therefore, in each transmissionIn gap, needs to dispatch out a certain number of users from the user of all request communication using acquisition module 11, obtain theseThe collection merging of user allows the user in the set to communicate.
Referring again to Fig. 4, in some embodiments, the step S12 in control method includes following sub-step:
S122: pilot signal described in the transmission using the current time slots is to obtain the second reception signal；
S124: the letter of the current time slots is obtained using the channel information of the second reception signal and the passing time slotThe information of road changing unit；
S126: the information of the channel variation part of current time slots described in Linear Estimation is to obtain the channel of the current time slotsThe fading coefficients of changing unit；And
S128: the channel information of current time slots is reconstructed using the channel information and the fading coefficients of passing time slot.
Referring again to Fig. 5, in some embodiments, the first estimation module 12 in control device 10 includes transmission module122, the first computing module 124, the second computing module 126, third computing module 128.Transmission module 122 described in utilization for working asTo obtain the second reception signal, the first computing module 124 is used to utilize described the pilot signal described in the transmission of preceding time slotThe channel information of two reception signals and the passing time slot obtains the information of the channel variation part of the current time slots, the second meterModule 126 is calculated for the information of the channel variation part of current time slots described in Linear Estimation to obtain the channel of the current time slotsThe fading coefficients of changing unit, third computing module 128 are used for channel information and the fading coefficients weight using passing time slotStructure goes out the channel information of current time slots.
In other words, step S122 can be realized by transmission module 122, and step S124 can be by the first computing module 124It realizes, step S126 can be realized that step S128 can be realized by third computing module 128 by the second estimation module 12.
The channel information for the current time slots n that first estimation module 12 estimates is a more accurate estimated value, this isSince for communicating user, there are certain correlations for channel between two adjoining time slots, and can use phase relationThe correlation degree of both number descriptions, especially when user is in the mobile state of static or low speed, two adjoining time slots itBetween correlation it is stronger, related coefficient is also bigger.Have the characteristics that correlation according to channel between two adjacent time-slots, it can will be currentThe channel information of time slot, which is regarded as, to be made of the channel information of the channel information of non-changing unit and changing unit.Wherein,The channel information of non-changing unit is obtained by the channel information of passing time slot and the product of related coefficient.Due to it is passing whenThe channel information of gap has been an accurate estimated value, therefore, when using step S12 description channel estimation methods intoThe channel estimation of row current time slots has included a part of accurately channel information value in obtained channel information, exist compared withThe part of big error is only that the information of channel variation part, thus the error of the channel information finally obtained is relatively small.AndTraditional channel estimation methods directly using pilot signal carry out channel estimation, obtained channel information do not include a part moreAccurate channel information value, the error of whole channel information because obtained from are also larger.
In some embodiments, the information of the channel variation part of Linear Estimation current time slots includes being based on lowest mean squareThe channel estimation of error criterion.
Since there are white Gaussian noises in channel, and the multipath effect in transmission process can generate the interference between subcarrierICI.Therefore the channel estimation methods based on minimum mean square error criterion are used, have good inhibition to ICI and white Gaussian noiseEffect, available more accurate channel information.
In some embodiments, control radio communication base station 20 includes using the transmission initial data of current time slotsInitial data is transmitted using channel coding or hybrid automatic repeat-request.
Due to the time-varying characteristics of channel, multipath fading and various artificial and natural noise interference, data are in the channelThe decline and phase shift that will receive different amplitudes when transmission cause receiving end to receive the information of mistake.It therefore, can be in transmissionIncrease redundant code and check code in the code stream of data, reduce the bit error rate of signal, improve the data of transmission anti-interference ability andThe reliability of transmission.Also it can use hybrid automatic repeat request technology to carry out data transmission.Hybrid automatic repeat request technologyIncluding the error control methods such as forward error correction and automatic repeat request, the bit error rate that can reduce system ensures the matter of data transmissionAmount, lifting system handling capacity and improve data transfer efficiency.
In some embodiments, control radio communication base station 40 utilizes the transmission initial data of the current time slotsData Detection is carried out including receiving signal to first to obtain initial data.
The first reception signal that radio communication base station 20 receives is the signal not demodulated, is needed to first receptionSignal carries out Data Detection to obtain initial data.
In some embodiments, the Data Detection includes the Data Detection based on minimum mean square error criterion.
Data Detection based on minimum mean square error criterion can with the interference of repressor intercarrier and white Gaussian noise, thusObtain accurate initial data.
In some embodiments, when reevaluating current using the long pilot signal of current time slots and the first reception signalThe channel information of gap includes the channel estimation based on minimum mean square error criterion.
Multipath effect and white Gaussian noise existing for channel can interfere the channel estimation of radio communication base station 20.It canThe accuracy of channel estimation is improved to inhibit to interfere to carry out channel estimation using minimum mean square error criterion.
In the description of this specification, reference term " embodiment ", " some embodiments ", " schematically implementationThe description of mode ", " example ", specific examples or " some examples " etc. means the tool described in conjunction with the embodiment or exampleBody characteristics, structure, material or feature are contained at least one embodiment or example of the invention.In the present specification,Schematic expression of the above terms are not necessarily referring to identical embodiment or example.Moreover, the specific features of description, knotStructure, material or feature can be combined in any suitable manner in any one or more embodiments or example.
Any process described otherwise above or method description are construed as in flow chart or herein, and expression includesIt is one or more for realizing specific logical function or process the step of executable instruction code module, segment or portionPoint, and the range of the preferred embodiment of the present invention includes other realization, wherein can not press shown or discussed suitableSequence, including according to related function by it is basic simultaneously in the way of or in the opposite order, Lai Zhihang function, this should be of the inventionEmbodiment person of ordinary skill in the field understood.
Each functional unit in various embodiments of the present invention can integrate in a processing module, be also possible to eachA unit physically exists alone, and can also be integrated in a module with two or more units.Above-mentioned integrated module was bothIt can take the form of hardware realization, can also be realized in the form of software function module.
Although embodiments of the present invention have been shown and described above, it is to be understood that above embodiment isIllustratively, it is not considered as limiting the invention, those skilled in the art within the scope of the invention can be rightAbove-mentioned implementation implementation is changed, modifies, replacement and variant.