CN101414873A - Communication receiver and frequency bias compensation method and apparatus - Google Patents
Communication receiver and frequency bias compensation method and apparatus Download PDFInfo
- Publication number
- CN101414873A CN101414873A CNA2007101761457A CN200710176145A CN101414873A CN 101414873 A CN101414873 A CN 101414873A CN A2007101761457 A CNA2007101761457 A CN A2007101761457A CN 200710176145 A CN200710176145 A CN 200710176145A CN 101414873 A CN101414873 A CN 101414873A
- Authority
- CN
- China
- Prior art keywords
- signal
- user
- frequency deviation
- module
- frequency
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Abstract
The invention discloses a communication receiver, a frequency offset compensation method thereof and a device. The communication receiver comprises a channel estimation module, a united detection module, a frequency offset compensation module with intermediate codes and a demodulation module, wherein, the frequency offset compensation module with intermediate codes comprises a frequency offset estimation module and a frequency offset compensation module, the frequency offset estimation module is used for the frequency offset estimation of user signals according to the intermediate codes for receiving the signals and channel estimation results output by the channel estimation module, and the frequency offset compensation module utilizes the result of frequency offset estimation to carry out the operation of frequency offset compensation to user detection signals output by the united detection module so as to input the compensated signals into the demodulation module to process. The invention can enlarge the scope of frequency offset estimation compensation and thus enhances the demodulation performance of the receiver under high speed environment.
Description
Technical field
The present invention relates to the mobile communication technology field, relate in particular to a kind of frequency bias compensation method and device of communication control processor, and the communication control processor of using described frequency bias compensation method and device.
Background technology
In mobile communication system, because the mobility of terminal is base station receiver or terminal receiver no matter cause, all have Doppler frequency shift in the signal that is received, and the translational speed of terminal is high more, and then Doppler frequency shift is big more, and the intersymbol phase deviation of adjacent data is also big more.Along with the development of high-speed railway and magnetic suspended railway, the translational speed of terminal will improve a lot in the mobile communication, can reach 300-400Km/h, and this can introduce very big Doppler frequency shift.
At present Time Division-Synchronous Code Division Multiple Access (TD-SCDMA, Time Division-Synchronized Code Division Multiple Access) in the mobile communication system, adopt linear combined detection algorithm to eliminate multipath and multiple access interference, but linear combined detection algorithm can not compensate the time covert biased commentaries on classics that is caused by Doppler frequency shift, promptly have the phase place amount of deflection in the symbol after joint-detection (being data symbol), this phase place amount of deflection is relevant with the size of Doppler frequency shift, because phase place and frequency have corresponding relation, so corresponding frequency shift (FS), frequency shift (FS) abbreviation frequency deviation of producing of phase place deflection meeting.With the translational speed of terminal in the reality, can think in a time slot that the frequency deviation that receives data is a certain value, the phase place that promptly receives data is a linear change in time.In order to improve demodulation performance, need carry out compensate of frequency deviation to detected symbol, promptly estimate the size of frequency deviation, again according to the frequency offset estimation result compensating for frequency offset, promptly the phase place to the frequency deviation correspondence compensates.
Existing frequency bias compensation method in the TD-SCDMA system is to carry out according to the symbol after detecting, main thought is the modulation scheme according to transmitting terminal, earlier the data symbol after detecting is carried out hard decision, bit behind the hard decision is modulated again, calculate the phase deviation of corresponding modulating symbol and detected symbol then, according to phase place linear change characteristic in time in the time slot, just can calculate phase increment and frequency deviation size, and carry out compensate of frequency deviation detecting data.
Be that example describes existing frequency offset estimating algorithm with Quaternary Phase Shift Keying (QPSK, Quaternary Phase Shift Keying) modulation scheme below.Fig. 1 is the QPSK planisphere.Fig. 2 is a detected block data structure schematic diagram in a certain time slot.Referring to Fig. 1 and Fig. 2, numeral spreading factor (SF among Fig. 2, Spreading Factor) be 16 o'clock symbolic number, 201 expressions of oblique line part participate in intermediate code (Midamble) part of channel estimating, and latticed data division 202 be a M data symbol of close intermediate code; Numeral 1 expression takies a data symbol, and GP represents the interval of the protection between time slot in the TD system, and free of data sends.Existing compensation method is to estimate according to M data symbol near intermediate code in the detected data block of each time slot.
Be that 16 code channel is that example describes existing compensate of frequency deviation scheme with a spreading factor below, mainly may further comprise the steps:
1) receiver is selected 2M data symbol near the intermediate code part from the detected data of current time slots, shown in 202 among Fig. 2.
2) according to QPSK planisphere shown in Figure 1,2M the data symbol of selecting carried out hard decision, and hard-decision bits is modulated again, obtain 2M modulation symbol.
3) phase difference of described 2M data symbol of calculating and 2M corresponding modulating symbol obtains 2M phase value.
4) according to the linear change characteristic of phase place and 2M the phase value that obtains, calculate the phase increment between data symbol, can calculate frequency deviation f according to following relational expression (1):
θ＝2πft (1)
5) according to the frequency deviation f that calculates the detected data of this time slot are carried out compensate of frequency deviation.
According to the planisphere of QPSK, described hard decision process is: calculate the Euclidean distance of four constellation point in detected data symbol and the planisphere, the data symbol of the constellation point correspondence of Euclidean distance minimum is promptly thought the data symbol that transmitting terminal sends.According to planisphere, phase difference between two adjacent constellation point is: pi/2, in conjunction with top hard decision process, under desirable noise-free case, this just requires to participate in phase place rotation maximum in the symbol of frequency offset estimating and can not surpass π/4 to guarantee the correct condition of hard decision to be the phase place rotation that receives data less than π/4., and the schematic diagram that provides according to Fig. 2, from intermediate code symbolic number farthest is M+1+4, the value of M can be any integer value in 1 to 22 in theory, the more little frequency deviation region that can estimate of M value is big more but precision is poor more, and the big more frequency deviation region that can estimate of M value is more little, but precision is higher.Consider the influence of noise and interference in the reality, M is too poor less than 3 o'clock frequency offset estimation accuracy, provide M below and get the maximum frequency deviation scope that ideally can estimate at 3 o'clock, the time span of maximum phase rotation this moment symbol is 8 symbol lengths, and following relational expression (2) is promptly arranged:
π/4＝2πf(8*Δt) (2)
In the formula (2) 8 expression symbolic number, Δ t=16/1.28e6, therefore can calculate the maximum frequency deviation that ideally can estimate is 1250Hz.Consider the influence of noise and interference, the frequency deviation that can estimate can be less than 1250Hz.Yet in the TD-SCDMA system, the base station adopts reference frequency point to carry out receiving and transmitting signal, and terminal is to adopt the mode receiving and transmitting signal of frequency-tracking, and the signal that comes self terminal that makes the base station receive contains the Doppler frequency shift amount of twice.Suppose that moving velocity of terminal is 400Km/h, then maximum doppler frequency is 740Hz, and the signal that this moment, the base station received is 1480Hz with respect to the maximum frequency shift of reference frequency point.And maximum frequency deviation that can estimation compensation under the ideal situation in the existing above-mentioned technology is 1250Hz.Therefore, the shortcoming of above-mentioned existing compensate of frequency deviation technology is that the frequency deviation region that can estimate is less, makes that receiver demodulation performance under high velocity environment is very poor, even can not proper solution transfer.
Summary of the invention
In view of this, technical problem to be solved by this invention is to provide a kind of frequency bias compensation method of communication control processor, to increase the scope of frequency offset estimation compensation, improves the demodulation performance of receiver under high velocity environment.
Another technical problem to be solved by this invention is to provide a kind of compensate of frequency deviation device of communication control processor, to increase the scope of frequency offset estimation compensation, improves the demodulation performance of receiver under high velocity environment.
The another technical problem that will solve of the present invention is to provide a kind of communication control processor, can increase the scope of frequency offset estimation compensation, is implemented in the high demodulation performance under the high velocity environment.
In order to realize the foregoing invention purpose, main technical schemes of the present invention is:
A kind of frequency bias compensation method of communication control processor comprises:
A, subscriber signal is carried out frequency offset estimating according to the intermediate code and the channel estimation results of received signal;
B, user's detection signal is carried out compensate of frequency deviation according to described frequency offset estimation result.
Preferably, described steps A specifically comprises:
A1, determine each self-corresponding channel estimation results of different user;
A2, according to each user's the channel estimation results and the intermediate code of received signal, determine each user's reference signal respectively according to the channel estimating method; Wherein at investigating the user, non-the reference signal of investigating the user is interference signal;
A3, deduct the interference signal of investigating the user, obtain investigating user's received signal with total received signal;
A4, the reference signal that will investigate the user are relevant with the received signal conjugation, obtain conjugated signal;
The phase place of the corresponding conjugated signal of user is investigated in A5, calculating, investigates user's frequency deviation according to the linear change property calculation of phase place.
Preferably, the detailed process of the channel estimation results of steps A 1 described definite a certain user's correspondence is:
Determine the estimating window of described CU; Channel estimation results to described received signal screens, and only keeps the tap in the described CU estimating window, and all zero setting of other tap obtains described user's channel estimation results.
Preferably, specifically comprise in the steps A 4: reference signal and the received signal with described investigation user merges respectively, with reference signal after merging and the relevant conjugated signal that obtains of received signal conjugation after the merging; Perhaps, the reference signal that will investigate the user earlier is relevant with the received signal conjugation, will obtain conjugated signal again and merge, and obtains merging the conjugated signal after the processing.
Preferably, described merging method is: one in the complex number components of described signal above adjacent continuous component is simply asked average.
Preferably, described receiver has an above antenna, carry out described steps A at the signal that each antenna receives, and the received signal power that utilizes each antenna is weighted merging to user's frequency offset estimation result of each antenna, carries out compensate of frequency deviation with the frequency offset estimation result after merging in step B.
Preferably, further comprise before the step B: described frequency offset estimation result is carried out the recurrence smoothing processing; Carry out compensate of frequency deviation according to described recurrence smoothing processing result among the step B.
A kind of compensate of frequency deviation device of communication control processor, this device comprises: frequency deviation estimating modules and compensate of frequency deviation module; Wherein:
Frequency deviation estimating modules is used for according to the channel estimation results of the intermediate code of received signal and receiver subscriber signal being carried out frequency offset estimating;
The compensate of frequency deviation module utilizes described frequency offset estimation result that user's detection signal of receiver is carried out compensate of frequency deviation.
Preferably, described frequency deviation estimating modules specifically comprises:
The channel post-processing module is used for the channel estimation results of receiver is carried out branch user processing, obtains each self-corresponding channel estimation results of different user;
The reference signal determination module is used for according to described each user's the channel estimation results and the intermediate code of received signal, determines each user's reference signal respectively; Wherein at investigating the user, non-the reference signal of investigating the user is interference signal;
The received signal determination module is used for total received signal is deducted the interference signal of investigating the user, obtains investigating user's received signal;
The conjugated signal determination module, the reference signal that is used for investigating the user is relevant with the received signal conjugation, obtains conjugated signal;
The frequency deviation determination module is used for determine investigating the phase place of the conjugated signal of user's correspondence, determines described investigation user's frequency deviation according to described phase place.
Preferably, described frequency deviation estimating modules further comprises: phase place merges module, is used for combined signal to reduce the length of signal;
Described phase place merges module and cooperates with the conjugated signal determination module: respectively described reference signal and received signal are merged, the relevant conjugated signal that obtains of received signal conjugation with after reference signal after merging and the merging is input to the frequency deviation determination module with this conjugated signal; Perhaps directly conjugated signal is merged, the conjugated signal after merging is input to the frequency deviation determination module.
Preferably, described receiver has an above antenna, and described frequency deviation estimating modules is carried out frequency offset estimating to the subscriber signal that each antenna receives respectively; And described compensate of frequency deviation device further comprises: frequency deviation merges module, is used for the frequency offset estimation result of all antenna correspondences is merged; The compensate of frequency deviation module is carried out compensate of frequency deviation with the frequency offset estimation result after merging.
Preferably, described device further comprises recurrence smoothing processing module, is used for before frequency offset estimating input compensate of frequency deviation module described frequency offset estimating being carried out the recurrence smoothing processing, and the frequency offset estimating after handling is inputed to the compensate of frequency deviation module.
A kind of communication control processor comprises channel estimation module, joint-detection module and demodulation module, it is characterized in that, further comprises intermediate code compensate of frequency deviation module, comprising frequency deviation estimating modules and compensate of frequency deviation module; Frequency deviation estimating modules is used for according to the channel estimation results of the intermediate code of received signal and channel estimation module output subscriber signal being carried out frequency offset estimating; User's detection signal that the compensate of frequency deviation module utilizes described frequency offset estimation result that the associating detection module is exported carries out compensate of frequency deviation, the signal after the compensation is inputed to demodulation module handle.
Preferably, further comprise secondary compensate of frequency deviation module in the described demodulation module, be used near the specified data symbols of intermediate code subscriber signal being carried out frequency offset estimating, utilize frequency offset estimation result that user's detection signal is carried out compensate of frequency deviation again according to received signal.
The present invention is according to the known basic midamble code's sequence of receiver and each user's channel estimation results, obtain current investigation user's reference signal and interference signal, and from the multi-user's intermediate code that receives, obtain this user's received signal by interference eliminated, the frequency deviation information that contains current investigation user in this received signal, the reference signal by calculating current investigation user and the phase difference of received signal change relation, can calculate current investigation user's frequency deviation size.
Utilize technical solution of the present invention, what need compare is two phase relations between the sequence of complex numbers, linear relationship according to frequency and phase place, the cycle saltus step did not appear in estimated time as long as guarantee the sequence of complex numbers phase place, and the cycle of plural phase place is 2 π, the maximum phase variable quantity that can allow in estimated time when therefore adopting intermediate code to carry out frequency offset estimating is 2 π, can get following formula (3) according to the relation of frequency and phase place:
2π＝2πf(8*Δt) (3)
Δ t=16/1.28e6 represents the time span of a data symbol or 16 chips in the formula (3), can calculating ideally according to formula (3), the maximum estimated frequency deviation is 10000Hz, and the maximum doppler frequency of moving velocity of terminal base station end when being 400Km/h is 1480Hz, and the maximum doppler frequency of terminal is 740Hz.Therefore, the present invention can increase the scope of frequency offset estimation compensation with respect to prior art as can be seen, can satisfy the compensation demand of frequency deviation under the high velocity environment, improves the demodulation performance of receiver under high velocity environment.
In addition, the present invention can merge relevant reference signal, received signal, conjugated signal in calculation processes, utilizes amalgamation result to handle again and obtains frequency offset estimating, therefore can reduce amount of calculation, improves treatment effeciency.
The present invention can also utilize described method of subscriber signal being carried out frequency offset estimation compensation according to intermediate code and channel estimation results that user's detection signal is compensated for the first time earlier, utilize existing frequency offset estimation compensation method to carry out the secondary compensate of frequency deviation again, thereby make compensate of frequency deviation more accurate, further improve demodulation performance.
The present invention can be applied in the terminal or base station of mobile communication system, because the signal that the base station termination is received is the twice of terminal with respect to the maximum frequency shift of reference frequency point, so the present invention is particularly useful for the receiver of base station.
Description of drawings
Fig. 1 is the QPSK planisphere;
Fig. 2 is a detected block data structure schematic diagram in a certain time slot;
Fig. 3 is the structural representation of communication control processor of the present invention;
Fig. 4 is the structural representation of intermediate code compensate of frequency deviation module of the present invention;
Fig. 5 is the flow chart of a kind of specific embodiment of frequency bias compensation method of the present invention.
Embodiment
Below by specific embodiments and the drawings the present invention is described in further details.
Core concept of the present invention is: communication control processor carries out frequency offset estimating according to the intermediate code and the channel estimation results of received signal to subscriber signal, according to described frequency offset estimation result user's detection signal is carried out compensate of frequency deviation.
Fig. 3 is the structural representation of communication control processor of the present invention.Referring to Fig. 3, described communication control processor comprises channel estimation module 301, joint-detection module 302, intermediate code compensate of frequency deviation module 303 and demodulation module 304.Wherein channel estimation module 301 obtains original estimation result h according to receiving data e
Raw, 302 pairs of receptions of joint-detection module data e carries out united detection processing and obtains Multiuser Detection data d
Sym0, demodulation module 304 is used for subscriber signal is carried out demodulation process, output restituted signal d
Bit, above-mentioned channel estimation module 301, joint-detection module 302 and demodulation module 304 can adopt the corresponding technology in the existing receiver to realize.The module that intermediate code compensate of frequency deviation module 303 increases newly for the present invention is comprising frequency deviation estimating modules and compensate of frequency deviation module; Frequency deviation estimating modules is used for the intermediate code of the received signal e that receives according to receiver and the channel estimation results h of channel estimation module 301 outputs
RawSubscriber signal is carried out frequency offset estimating; The compensate of frequency deviation module is utilized the user detection signal d of described frequency offset estimation result to 302 outputs of associating detection module
Sym0Carry out compensate of frequency deviation, with the signal d after the compensation
Sym1Inputing to demodulation module 304 handles.Further comprise secondary compensate of frequency deviation module in the described demodulation module 304, be used near the specified data symbols of intermediate code subscriber signal being carried out frequency offset estimating, utilize frequency offset estimation result that user's detection signal is carried out compensate of frequency deviation again according to received signal.
Fig. 4 is the structural representation of intermediate code compensate of frequency deviation module of the present invention.Referring to Fig. 4, intermediate code compensate of frequency deviation module 303 comprises: frequency deviation estimating modules 401 and compensate of frequency deviation module 402.Wherein comprise in the frequency deviation estimating modules 401:
Reference signal determination module 412 is used for according to described each user's the channel estimation results and the intermediate code of received signal, determines each user's reference signal respectively; Wherein at investigating the user, non-the reference signal of investigating the user is interference signal.Investigation user of the present invention is relative notion, for base station receiver, described investigation user is meant each user who relates in the current received signal, during at each user's signal processing, when the user of pre-treatment investigates the user exactly, non-other users that investigate the user are interference user, and the reference signal of interference user is an interference signal; In base station receiver, all need to carry out compensate of frequency deviation at each user of received signal correspondence.For terminal receiver, described investigation user is this terminal use, and other users' of non-terminal use reference signal is an interference signal.
Received signal determination module 413 is used for total received signal is deducted the interference signal of investigating the user, obtains investigating user's received signal.
Conjugated signal determination module 414, the reference signal that is used for investigating the user is relevant with the received signal conjugation, obtains conjugated signal.
Frequency deviation determination module 415, the phase place that is used for the conjugated signal of the definite user of investigation correspondence, determine described investigation user's frequency deviation according to described phase place, this frequency deviation is the frequency offset estimating value, needs this frequency offset estimating is input in the described compensate of frequency deviation module 402 to carry out compensate of frequency deviation.
Comprise further also in the frequency deviation estimating modules that phase place merges module 416, is used for combined signal to reduce the length of signal.Described phase place merges module 416 and cooperates with conjugated signal determination module 414, carry out following operation: respectively described reference signal and received signal are merged, the relevant conjugated signal that obtains of received signal conjugation with after reference signal after merging and the merging is input to frequency deviation determination module 415 with this conjugated signal; Perhaps directly conjugated signal is merged, the conjugated signal after merging is input to frequency deviation determination module 415.
When described receiver had an above antenna, described frequency deviation estimating modules 401 was carried out frequency offset estimating to the subscriber signal that each antenna receives respectively; And described intermediate code compensate of frequency deviation module 303 comprises that further frequency deviation merges module 417, can be arranged between frequency deviation estimating modules 401 and the compensate of frequency deviation module 402, be used for the frequency offset estimation result of all antenna correspondences is merged, amalgamation result is inputed to compensate of frequency deviation module 402; Compensate of frequency deviation module 402 is carried out compensate of frequency deviation with the frequency offset estimation result after merging.
Described device further comprises recurrence smoothing processing module 418, be arranged between frequency deviation estimating modules 401 and the compensate of frequency deviation module 402, be used for before frequency offset estimating input compensate of frequency deviation module, described frequency offset estimating is carried out the recurrence smoothing processing, the frequency offset estimating after handling is inputed to the compensate of frequency deviation module.
Among the present invention, above-mentioned phase place merges module 416, frequency deviation merges module 417 and recurrence smoothing processing module 418 is optional module, dots among Fig. 4.
Below introduce described intermediate code compensate of frequency deviation module and carry out the method for compensate of frequency deviation.Fig. 5 is the flow chart of a kind of specific embodiment of frequency bias compensation method of the present invention.Referring to Fig. 5, this flow process comprises:
The channel estimating of user and interference user is investigated in step 502, calculating.Comprise: determine to investigate user and the shared estimating window of interference user, the original estimation result after the denoising is screened, only keep the tap of investigating in the CU estimating window, all zero setting of other tap obtains investigating user's channel estimation results h
0In like manner, for the original estimation result after the denoising, only keep the tap in the shared estimating window of interference user, all zero setting of other tap then obtains the channel estimation results h of interference user
1Described investigation user and interference user are relative concepts, and for investigating the user, other user of non-investigation user is an interference user for the current user who carries out compensate of frequency deviation, and the signal of interference user is an interference signal, and described signal all is the sequence of complex numbers signal.
Known intermediate code sequence in channel estimation results that step 503, basis obtain above and the receiver is calculated each user's reference signal s and this user's interference signal i according to the channel estimating theory respectively to each antenna.For investigating the user, non-the reference signal of investigating the user is interference signal.
Concrete, for an investigation user, its corresponding reference signal s determines that according to following formula (4) corresponding interference signal i determines according to following formula (5):
In the following formula, k
aRepresent different antennas, m
0The known basic midamble code of expression receiving terminal,
The computing of expression circular convolution.
The reference signal s that the user is investigated in step 505, calculating is relevant with the conjugation of the received signal r that investigates the user, obtains containing the conjugated signal c of phase information.
Because comprise an above user's signal in the signal that receiver receives, the user's (promptly investigating the user) for current practical application needs to carry out above-mentioned steps 501 to step 507, investigate each self-corresponding frequency offset estimation result of user to estimate.
Certainly, above-mentioned steps 508 and/or step 509 are optional steps, also can be in the direct execution in step 510 in step 507 back.
In addition, in order further to improve the precision of compensate of frequency deviation, the present invention can utilize above-mentioned flow process shown in Figure 5 that user's detection signal is carried out the frequency offset estimation compensation first time earlier, is used for the coarse adjustment of frequency deviation; Utilize the described frequency offset estimation compensation method of prior art that user's detection signal is carried out the compensate of frequency deviation second time again, that is: according to the modulation scheme of transmitting terminal, earlier the data symbol after detecting is carried out hard decision, bit behind the hard decision is modulated again, calculate the phase deviation of corresponding modulating symbol and detected symbol then, according to phase place linear change characteristic in time in the time slot, just can calculate phase increment and frequency deviation size, and carry out compensate of frequency deviation to detecting data, described second time, compensate of frequency deviation can be used for the fine tuning of frequency deviation.
The above; only for the preferable embodiment of the present invention, but protection scope of the present invention is not limited thereto, and anyly is familiar with the people of this technology in the disclosed technical scope of the present invention; the variation that can expect easily or replacement all should be encompassed within protection scope of the present invention.
Claims (14)
1, a kind of frequency bias compensation method of communication control processor is characterized in that, comprising:
A, subscriber signal is carried out frequency offset estimating according to the intermediate code and the channel estimation results of received signal;
B, user's detection signal is carried out compensate of frequency deviation according to described frequency offset estimation result.
2, frequency bias compensation method according to claim 1 is characterized in that, described steps A specifically comprises:
A1, determine each self-corresponding channel estimation results of different user;
A2, according to each user's the channel estimation results and the intermediate code of received signal, determine each user's reference signal respectively according to the channel estimating method; Wherein at investigating the user, non-the reference signal of investigating the user is interference signal;
A3, deduct the interference signal of investigating the user, obtain investigating user's received signal with total received signal;
A4, the reference signal that will investigate the user are relevant with the received signal conjugation, obtain conjugated signal;
The phase place of the corresponding conjugated signal of user is investigated in A5, calculating, investigates user's frequency deviation according to the linear change property calculation of phase place.
3, frequency bias compensation method according to claim 2 is characterized in that, the detailed process of the channel estimation results of steps A 1 described definite a certain user's correspondence is:
Determine the estimating window of described CU; Channel estimation results to described received signal screens, and only keeps the tap in the described CU estimating window, and all zero setting of other tap obtains described user's channel estimation results.
4, frequency bias compensation method according to claim 2, it is characterized in that, specifically comprise in the steps A 4: reference signal and the received signal with described investigation user merges respectively, with reference signal after merging and the relevant conjugated signal that obtains of received signal conjugation after the merging; Perhaps, the reference signal that will investigate the user earlier is relevant with the received signal conjugation, will obtain conjugated signal again and merge, and obtains merging the conjugated signal after the processing.
5, frequency bias compensation method according to claim 4 is characterized in that, described merging method is: one in the complex number components of described signal above adjacent continuous component is simply asked average.
6, frequency bias compensation method according to claim 1, it is characterized in that, described receiver has an above antenna, carry out described steps A at the signal that each antenna receives, and the received signal power that utilizes each antenna is weighted merging to user's frequency offset estimation result of each antenna, carries out compensate of frequency deviation with the frequency offset estimation result after merging in step B.
7, frequency bias compensation method according to claim 1 is characterized in that, further comprises before the step B: described frequency offset estimation result is carried out the recurrence smoothing processing; Carry out compensate of frequency deviation according to described recurrence smoothing processing result among the step B.
8, a kind of compensate of frequency deviation device of communication control processor is characterized in that, this device comprises: frequency deviation estimating modules and compensate of frequency deviation module; Wherein:
Frequency deviation estimating modules is used for according to the channel estimation results of the intermediate code of received signal and receiver subscriber signal being carried out frequency offset estimating;
The compensate of frequency deviation module utilizes described frequency offset estimation result that user's detection signal of receiver is carried out compensate of frequency deviation.
9, compensate of frequency deviation device according to claim 8 is characterized in that, described frequency deviation estimating modules specifically comprises:
The channel post-processing module is used for the channel estimation results of receiver is carried out branch user processing, obtains each self-corresponding channel estimation results of different user;
The reference signal determination module is used for according to described each user's the channel estimation results and the intermediate code of received signal, determines each user's reference signal respectively; Wherein at investigating the user, non-the reference signal of investigating the user is interference signal;
The received signal determination module is used for total received signal is deducted the interference signal of investigating the user, obtains investigating user's received signal;
The conjugated signal determination module, the reference signal that is used for investigating the user is relevant with the received signal conjugation, obtains conjugated signal;
The frequency deviation determination module is used for determine investigating the phase place of the conjugated signal of user's correspondence, determines described investigation user's frequency deviation according to described phase place.
10, compensate of frequency deviation device according to claim 9 is characterized in that, described frequency deviation estimating modules further comprises: phase place merges module, is used for combined signal to reduce the length of signal;
Described phase place merges module and cooperates with the conjugated signal determination module: respectively described reference signal and received signal are merged, the relevant conjugated signal that obtains of received signal conjugation with after reference signal after merging and the merging is input to the frequency deviation determination module with this conjugated signal; Perhaps directly conjugated signal is merged, the conjugated signal after merging is input to the frequency deviation determination module.
11, compensate of frequency deviation device according to claim 9 is characterized in that, described receiver has an above antenna, and described frequency deviation estimating modules is carried out frequency offset estimating to the subscriber signal that each antenna receives respectively; And described compensate of frequency deviation device further comprises: frequency deviation merges module, is used for the frequency offset estimation result of all antenna correspondences is merged; The compensate of frequency deviation module is carried out compensate of frequency deviation with the frequency offset estimation result after merging.
12, compensate of frequency deviation device according to claim 8, it is characterized in that, described device further comprises recurrence smoothing processing module, be used for before frequency offset estimating input compensate of frequency deviation module, described frequency offset estimating is carried out the recurrence smoothing processing, the frequency offset estimating after handling is inputed to the compensate of frequency deviation module.
13, a kind of communication control processor comprises channel estimation module, joint-detection module and demodulation module, it is characterized in that, further comprises intermediate code compensate of frequency deviation module, comprising frequency deviation estimating modules and compensate of frequency deviation module; Frequency deviation estimating modules is used for according to the channel estimation results of the intermediate code of received signal and channel estimation module output subscriber signal being carried out frequency offset estimating; User's detection signal that the compensate of frequency deviation module utilizes described frequency offset estimation result that the associating detection module is exported carries out compensate of frequency deviation, the signal after the compensation is inputed to demodulation module handle.
14, communication control processor according to claim 13, it is characterized in that, further comprise secondary compensate of frequency deviation module in the described demodulation module, be used near the specified data symbols of intermediate code subscriber signal being carried out frequency offset estimating, utilize frequency offset estimation result that user's detection signal is carried out compensate of frequency deviation again according to received signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101761457A CN101414873A (en) | 2007-10-19 | 2007-10-19 | Communication receiver and frequency bias compensation method and apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101761457A CN101414873A (en) | 2007-10-19 | 2007-10-19 | Communication receiver and frequency bias compensation method and apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101414873A true CN101414873A (en) | 2009-04-22 |
Family
ID=40595217
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2007101761457A Pending CN101414873A (en) | 2007-10-19 | 2007-10-19 | Communication receiver and frequency bias compensation method and apparatus |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101414873A (en) |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101925170B (en) * | 2009-06-16 | 2012-12-05 | 电信科学技术研究院 | Frequency control device and automatic frequency control method thereof |
| CN103095610A (en) * | 2011-11-02 | 2013-05-08 | 意法-爱立信有限公司 | Frequency offset estimation method and device and communication equipment |
| CN103227759A (en) * | 2012-01-31 | 2013-07-31 | 电信科学技术研究院 | Method and equipment for detecting user signals |
| CN104579513A (en) * | 2015-01-29 | 2015-04-29 | 武汉虹旭信息技术有限责任公司 | DSP (digital signal processor)-based TD-SCDMA terminal frequency deviation correcting system and method |
| CN104871465A (en) * | 2012-12-20 | 2015-08-26 | 高通股份有限公司 | Systems and methods to mitigate phase noise |
| CN103904998B (en) * | 2012-12-28 | 2017-02-08 | 联芯科技有限公司 | Method and device for adjusting frequency of mobile terminal |
| CN106941468A (en) * | 2016-01-05 | 2017-07-11 | 中国移动通信集团公司 | The frequency deviation estimating method and device of long evolving system |
| CN108111457A (en) * | 2017-12-25 | 2018-06-01 | 中国电子科技集团公司第五十四研究所 | For the device of the high speed demodulation under the conditions of Bandwidth-Constrained |
| US10355792B2 (en) | 2017-01-19 | 2019-07-16 | Samsung Electronics Co., Ltd. | System and method for frequency estimation bias removal |
| CN111585926A (en) * | 2020-04-28 | 2020-08-25 | 北京升哲科技有限公司 | Multi-antenna diversity receiver |
| CN113179234A (en) * | 2021-04-26 | 2021-07-27 | 哈尔滨工程大学 | High dynamic long signal accumulation method based on block Doppler compensation |
-
2007
- 2007-10-19 CN CNA2007101761457A patent/CN101414873A/en active Pending
Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101925170B (en) * | 2009-06-16 | 2012-12-05 | 电信科学技术研究院 | Frequency control device and automatic frequency control method thereof |
| CN103095610B (en) * | 2011-11-02 | 2017-08-25 | 意法-爱立信有限公司 | A kind of frequency deviation estimating method, device and communication equipment |
| CN103095610A (en) * | 2011-11-02 | 2013-05-08 | 意法-爱立信有限公司 | Frequency offset estimation method and device and communication equipment |
| CN103227759A (en) * | 2012-01-31 | 2013-07-31 | 电信科学技术研究院 | Method and equipment for detecting user signals |
| CN103227759B (en) * | 2012-01-31 | 2016-08-24 | 电信科学技术研究院 | A kind of detection method for subscriber signal and equipment |
| CN104871465A (en) * | 2012-12-20 | 2015-08-26 | 高通股份有限公司 | Systems and methods to mitigate phase noise |
| CN103904998B (en) * | 2012-12-28 | 2017-02-08 | 联芯科技有限公司 | Method and device for adjusting frequency of mobile terminal |
| CN104579513A (en) * | 2015-01-29 | 2015-04-29 | 武汉虹旭信息技术有限责任公司 | DSP (digital signal processor)-based TD-SCDMA terminal frequency deviation correcting system and method |
| CN104579513B (en) * | 2015-01-29 | 2017-01-18 | 武汉虹旭信息技术有限责任公司 | Terminal frequency deviation correcting method |
| CN106941468A (en) * | 2016-01-05 | 2017-07-11 | 中国移动通信集团公司 | The frequency deviation estimating method and device of long evolving system |
| CN106941468B (en) * | 2016-01-05 | 2019-11-12 | 中国移动通信集团公司 | The frequency deviation estimating method and device of long evolving system |
| US10355792B2 (en) | 2017-01-19 | 2019-07-16 | Samsung Electronics Co., Ltd. | System and method for frequency estimation bias removal |
| CN108111457A (en) * | 2017-12-25 | 2018-06-01 | 中国电子科技集团公司第五十四研究所 | For the device of the high speed demodulation under the conditions of Bandwidth-Constrained |
| CN108111457B (en) * | 2017-12-25 | 2020-10-16 | 中国电子科技集团公司第五十四研究所 | Device for high-speed demodulation under bandwidth-limited condition |
| CN111585926A (en) * | 2020-04-28 | 2020-08-25 | 北京升哲科技有限公司 | Multi-antenna diversity receiver |
| CN111585926B (en) * | 2020-04-28 | 2021-07-27 | 北京升哲科技有限公司 | Multi-antenna diversity receiver |
| WO2021217895A1 (en) * | 2020-04-28 | 2021-11-04 | 北京升哲科技有限公司 | Multi-antenna diversity receiver |
| CN113179234A (en) * | 2021-04-26 | 2021-07-27 | 哈尔滨工程大学 | High dynamic long signal accumulation method based on block Doppler compensation |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101414873A (en) | Communication receiver and frequency bias compensation method and apparatus | |
| CN101814931B (en) | Doppler frequency shift estimation and compensation method in TD-SCDMA (Time Division-Synchronization Code Division Multiple Access) system | |
| CN101547062B (en) | Method and device for correcting frequency deviation | |
| CN102223322B (en) | Estimation method and apparatus for frequency offset | |
| US6289061B1 (en) | Wideband frequency tracking system and method | |
| CN112203347B (en) | Continuous phase modulation preamble design and synchronization method and device thereof | |
| CN109962714A (en) | A kind of electromagnetic spectrum umbrella cover numeric field self-interference suppressing method and system | |
| CN101449479A (en) | Method and system for information transmission | |
| WO2002032067A1 (en) | Method for automatic frequency control | |
| US8711983B2 (en) | Phase locking loop | |
| CN103314559A (en) | Automatic frequency offset compensation in zero-intermediate frequency receivers using minimum-shift keying (msk) signaling | |
| CN202906963U (en) | A frequency deviation estimating system of a coherent demodulation frequency shift keying modulating signal | |
| CN1719815B (en) | Method for estimating and correcting frequency shift and apparatus thereof | |
| CN101189846B (en) | Method for detecting data symbol and receiving unit | |
| US6249518B1 (en) | TDMA single antenna co-channel interference cancellation | |
| CN107204948B (en) | A kind of frequency deviation compensation system under the fast frequency-hopped system in broadband | |
| CN101102293A (en) | A frequency deviation estimation device and method | |
| CN105681245B (en) | A kind of frequency tracking method based on contiguous segmentation sliding window estimation frequency deviation | |
| CN100544333C (en) | Frequency deviation estimating method in the mobile communication system and device | |
| CN101667846A (en) | Method and device for automatically controlling frequency in TD-SCDMA system | |
| CN101789807A (en) | Frequency deviation evaluation method, device and communication device | |
| CN101345549B (en) | Frequency deviation estimation method and apparatus used for time division-synchronous code division multiple access system | |
| US20030021247A1 (en) | Frequency discriminator | |
| CN101646232B (en) | Method, device and communication equipment for estimating frequency deviations | |
| CN101635583B (en) | Anti-phase deviation demodulation method of narrow-band high-speed frequency hopping system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| ASS | Succession or assignment of patent right |
Owner name: INST OF TELECOMMUNICATION SCIENCE AND TECHNOLGOY Free format text: FORMER OWNER: DATANG MOBILE COMMUNICATION EQUIPMENT CO., LTD. Effective date: 20110402 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 100083 NO. 29, XUEYUAN ROAD, HAIDIAN DISTRICT, BEIJING TO: 100191 NO. 40, XUEYUAN ROAD, HAIDIAN DISTRICT, BEIJING |
|
| TA01 | Transfer of patent application right |
Effective date of registration: 20110402 Address after: 100191 Haidian District, Xueyuan Road, No. 40, Applicant after: Inst of Telecommunication Science and Technolgoy Address before: 100083 Haidian District, Xueyuan Road, No. 29, Applicant before: Datang Mobile Communication Equipment Co., Ltd. |
|
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20090422 |