CN106487729B - A kind of frequency offset estimation method and device - Google Patents
A kind of frequency offset estimation method and device Download PDFInfo
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- CN106487729B CN106487729B CN201610851911.4A CN201610851911A CN106487729B CN 106487729 B CN106487729 B CN 106487729B CN 201610851911 A CN201610851911 A CN 201610851911A CN 106487729 B CN106487729 B CN 106487729B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/0014—Carrier regulation
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/26—Systems using multi-frequency codes
- H04L27/2601—Multicarrier modulation systems
- H04L27/2647—Arrangements specific to the receiver only
- H04L27/2655—Synchronisation arrangements
- H04L27/2689—Link with other circuits, i.e. special connections between synchronisation arrangements and other circuits for achieving synchronisation
- H04L27/2695—Link with other circuits, i.e. special connections between synchronisation arrangements and other circuits for achieving synchronisation with channel estimation, e.g. determination of delay spread, derivative or peak tracking
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/32—Carrier systems characterised by combinations of two or more of the types covered by groups H04L27/02, H04L27/10, H04L27/18 or H04L27/26
- H04L27/34—Amplitude- and phase-modulated carrier systems, e.g. quadrature-amplitude modulated carrier systems
- H04L27/38—Demodulator circuits; Receiver circuits
- H04L27/3845—Demodulator circuits; Receiver circuits using non - coherent demodulation, i.e. not using a phase synchronous carrier
- H04L27/3854—Demodulator circuits; Receiver circuits using non - coherent demodulation, i.e. not using a phase synchronous carrier using a non - coherent carrier, including systems with baseband correction for phase or frequency offset
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/0014—Carrier regulation
- H04L2027/0024—Carrier regulation at the receiver end
- H04L2027/0026—Correction of carrier offset
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Abstract
The embodiment of the invention discloses a kind of frequency offset estimation method and devices, base station is by carrying out frequency deviation pre-compensation to the upstream data got, obtain the road 2N+1 pre-compensation data, then power is received according to the maximum useful signal of the road 2N+1 pre-compensation data, determine the first appraising frequency bias value of terminal, and the phase difference of two frequency pilot signs of the corresponding pre-compensation data of power is received according to maximum useful signal, obtain the second appraising frequency bias value, the appraising frequency bias value of terminal is finally obtained according to the first appraising frequency bias value and the second appraising frequency bias value, to by the way that frequency deviation pre-compensation estimation is combined with frequency pilot sign estimation, effectively expand appraising frequency bias range, the precision for improving appraising frequency bias and base station are to the demodulation ability of PUCCH, avoid the frequency deviation of PUCCHformat2/2a/2b in the prior art The technical problem that evaluation method appraising frequency bias range that may be present is small, precision is low.
Description
Technical field
The present invention relates to wireless communication technology field more particularly to a kind of frequency offset estimation method and devices.
Background technique
In a wireless communication system, mobile bring Doppler frequency shift of the frequency difference between terminal and base station and terminal etc. because
There are certain frequency shift (FS), abbreviation frequency deviations for the carrier frequency that element all can cause base station to receive.Since the presence of frequency deviation can be broken
The orthogonality of bad carrier wave leads to the decline of base station decoding performance, and it is therefore necessary to estimate frequency deviation.
In LTE (Long Term Evolution, long term evolution) system, terminal passes through PUCCH (Physical
Uplink Control Channel, Physical Uplink Control Channel) to base station send upstream dispatching instructions or PDSCH
The feedback information of (Physical Downlink Shared Channel, Physical Downlink Shared Channel), passes through PUSCH
(Physical Uplink Shared Channel, Physical Uplink Shared Channel) sends upstream data to base station.The prior art
In, base station mainly carries out appraising frequency bias using PUSCH, however, in some cases, PUCCH scheduling and PUSCH scheduling are different
Surely exist simultaneously, therefore, when only existed in a period of time PUCCH scheduling may be not present PUSCH scheduling when, base station can not utilize
PUSCH carries out offset estimation.And in the prior art, it is directed to the frequency offset estimation method of PUCCH, is mainly utilized by base station
The phase difference that PUCCH is received between the symbol of the identical signal sent in signal carrys out estimating frequency offset value.For PUCCHformat1/
For 1a/1b and format3/3a/3b, since the interval of the frequency pilot sign of format1/1a/1b and format3/3a/3 is smaller,
Therefore, this method has biggish frequence estimation range, and estimation precision is high；However, coming for PUCCH format2/2a/2b
Say, since the interval between two frequency pilot signs in format2/2a/2b is larger, there may be appraising frequency bias using party's rule
The problem that range is small or appraising frequency bias precision is low.Appraising frequency bias range is small, then is unable to satisfy the very big scene of frequency deviation, such as how general
Strangle the very big high-speed rail scene of frequency displacement；Appraising frequency bias precision is low, then is unable to satisfy the performance requirement of multiplexing multiple-user.
Summary of the invention
The present invention provides a kind of frequency offset estimation method and devices, are applied to PUCCH in the prior art for solving
The technology that the frequency offset estimation method of format2/2a/2b appraising frequency bias range that may be present is small or appraising frequency bias precision is low is asked
Topic.
The embodiment of the invention provides a kind of frequency offset estimation methods, comprising:
Base station obtains the upstream data of the transmission of multiple terminals in the base station range in the set time period；
The base station carries out frequency deviation pre-compensation using default step value, to the upstream data, obtains the road 2N+1 precompensation
Data, N are integer；
The base station obtains the multiple terminal according to every pre-compensation data all the way in the pre-compensation data of the road 2N+1
The useful signal per pre-compensation data all the way receive power；
The base station executes: pre- according to the road 2N+1 of the first terminal for the first terminal in the multiple terminal
The useful signal of offset data receives the maximum useful signal in power and receives power, obtains the first frequency deviation of the first terminal
Estimated value；And the phase of two frequency pilot signs in the corresponding pre-compensation data of power is received according to the maximum useful signal
Potential difference obtains the second appraising frequency bias value of the first terminal；The base station is according to first frequency deviation of the first terminal
Estimated value and the second appraising frequency bias value, obtain the appraising frequency bias value of the first terminal；The first terminal is described more
Any terminal in a terminal.
Optionally, before the base station obtains the upstream data that multiple terminals in the base station range are sent, also
Include:
The base station determines the maximum frequency deviation estimated value in the base station range, and determines that the base station covers model
Maximum frequency deviation estimated value in enclosing is greater than default frequency deviation threshold value.
Optionally, the base station obtains described according to every pre-compensation data all the way in the pre-compensation data of the road 2N+1
Multiple terminals receive power per the corresponding useful signal of pre-compensation data all the way, comprising:
The base station obtains the multiple terminal according to every pre-compensation data all the way in the pre-compensation data of the road 2N+1
Each of the corresponding initial useful signal per pre-compensation data all the way of terminal receive power；
The base station is directed to the first terminal, and execute: the base station determines the jth road pre-compensation data of second terminal
To the energy leakage value of the first terminal；The base station is according to the jth road pre-compensation data of the second terminal to described
The energy leakage value of one terminal determines the second terminal to the energy leakage value of the first terminal；The base station is according to institute
The corresponding initial useful signal of the i-th road pre-compensation data for stating first terminal receives in power and the multiple terminal except the
Other terminals outside one terminal determine the i-th road precompensation number of the first terminal to the energy leakage value of the first terminal
Power is received according to corresponding useful signal, the second terminal is any terminal in addition to first terminal in the multiple terminal, 1
≤ i≤2N+1,1≤j≤2N+1.
Optionally, the base station determines the jth road pre-compensation data of the second terminal to described first as follows
The energy leakage value of terminal:
LPs (a, b, j)=fac (a, b) * avg_dPs (b, j)
Wherein, a is the mark of first terminal, and b is the mark of second terminal, and lPs (a, b, j) is the second terminal b's
Energy leakage value of the jth road pre-compensation data to the first terminal a；Fac (a, b) is the second terminal b to described first
The energy leakage factor of terminal a；Avg_dPs (b, j) is the jth road pre-compensation data of the second terminal b to other terminals
Averagely reveal energy.
Optionally, the base station determine as follows the second terminal to the energy leakage of the first terminal because
Son:
The base station is poor according to the relative spacing of the first terminal and the ZC sequence number of the second terminal, described in determination
The energy leakage factor of the second terminal to the first terminal；
The relative spacing difference of the first terminal and the ZC sequence number of the second terminal is determined as follows:
DZC (a, b)=min (| aZC-bZC |, | NZC+bZC-aZC |)/NZC
Wherein, the relative spacing that dZC (a, b) is the first terminal a and the ZC sequence number of the second terminal b is poor；aZC
For the ZC sequence number of the first terminal a；BZC is the ZC sequence number of the second terminal b；NZC is the total length of ZC sequence number.
Optionally, the base station determines the jth road pre-compensation data of the second terminal to other terminals as follows
Average leakage energy:
The base station receives power and described according to the initial useful signal of the jth road pre-compensation data of the second terminal
Useful signal before second terminal frequency deviation pre-compensation receives power, obtains the jth road pre-compensation data of the second terminal in frequency
The initial useful signal of precompensation front and back partially receives difference power；
Initial useful letter of the base station according to the jth road pre-compensation data of the second terminal before and after frequency deviation pre-compensation
Number receive difference power, obtain average leakage energy of the jth road pre-compensation data to other terminals of second terminal.
The embodiment of the invention also provides a kind of frequency offset estimating devices, comprising:
Module is obtained, for obtaining the upper line number of the transmission of multiple terminals in base station range in the set time period
According to；
Module is pre-compensated for, for using default step value, the upstream data got to the acquisition module to carry out frequency deviation
Precompensation, obtains the road 2N+1 pre-compensation data, N is integer；
Processing module, for often pre-compensating for all the way in the road the 2N+1 pre-compensation data according to the precompensation module determination
Data, the useful signal per pre-compensation data all the way for obtaining the multiple terminal receive power；
Execution module, for executing: being determined according to the processing module for the first terminal in the multiple terminal
The useful signal of the road the 2N+1 pre-compensation data of first terminal receives the maximum useful signal in power and receives power, obtains described
First appraising frequency bias value of first terminal；And it is received in the corresponding pre-compensation data of power according to the maximum useful signal
Two frequency pilot signs phase difference, obtain the second appraising frequency bias value of the first terminal；The base station is according to described first
The the first appraising frequency bias value and the second appraising frequency bias value of terminal, obtain the appraising frequency bias value of the first terminal；Institute
Stating first terminal is any terminal in the multiple terminal.
Optionally, described device further includes determining module, and the determining module is used for:
Before the acquisition module obtains the upstream data of the transmission of multiple terminals in the base station range, determine
Maximum frequency deviation estimated value in the base station range, and determine the maximum frequency deviation estimated value in the base station range
Greater than default frequency deviation threshold value.
Optionally, the processing module is specifically used for:
According to every pre-compensation data all the way in the pre-compensation data of the road 2N+1, obtain each in the multiple terminal
The corresponding initial useful signal per pre-compensation data all the way of a terminal receives power；
Be directed to the first terminal, execute: the base station determines the jth road pre-compensation data of second terminal to described the
The energy leakage value of one terminal；The base station is according to the jth road pre-compensation data of the second terminal to the first terminal
Energy leakage value determines the second terminal to the energy leakage value of the first terminal；The base station is whole according to described first
Pre-compensation data corresponding initial useful signal in the i-th road Duan receives in power and the multiple terminal in addition to first terminal
Other terminals to the energy leakage value of the first terminal, determine that the i-th road pre-compensation data of the first terminal is corresponding
Useful signal receives power, and the second terminal is any terminal in the multiple terminal in addition to first terminal, 1≤i≤2N+
1,1≤j≤2N+1.
Optionally, the processing module is also used to determine the jth road pre-compensation data of second terminal to institute as follows
State the energy leakage value of first terminal:
LPs (a, b, j)=fac (a, b) * avg_dPs (b, j)
Wherein, a is the mark of first terminal, and b is the mark of second terminal, and lPs (a, b, j) is the second terminal b's
Energy leakage value of the jth road pre-compensation data to the first terminal a；Fac (a, b) is the second terminal b to described first
The energy leakage factor of terminal a；Avg_dPs (b, j) is the jth road pre-compensation data of the second terminal b to other terminals
Averagely reveal energy.
Optionally, the processing module is also used to determine the second terminal to the energy of the first terminal as follows
Measure leaky factor:
The base station is poor according to the relative spacing of the first terminal and the ZC sequence number of the second terminal, described in determination
The energy leakage factor of the second terminal to the first terminal；
The relative spacing difference of the first terminal and the ZC sequence number of the second terminal is determined as follows:
DZC (a, b)=min (| aZC-bZC |, | NZC+bZC-aZC |)/NZC
Wherein, the relative spacing that dZC (a, b) is the first terminal a and the ZC sequence number of the second terminal b is poor；aZC
For the ZC sequence number of the first terminal a；BZC is the ZC sequence number of the second terminal b；NZC is the total length of ZC sequence number.
Optionally, the processing module is also used to determine the jth road pre-compensation data of the second terminal as follows
To the average leakage energy of other terminals:
The base station receives power and described according to the initial useful signal of the jth road pre-compensation data of the second terminal
Useful signal before second terminal frequency deviation pre-compensation receives power, obtains the jth road pre-compensation data of the second terminal in frequency
The initial useful signal of precompensation front and back partially receives difference power；
Initial useful letter of the base station according to the jth road pre-compensation data of the second terminal before and after frequency deviation pre-compensation
Number receive difference power, obtain average leakage energy of the jth road pre-compensation data to other terminals of second terminal.
In the embodiment of the present invention, base station carries out frequency deviation by the upstream data sent to the multiple terminals got and mends in advance
It repays, obtains the road 2N+1 pre-compensation data；According to the every pre-compensation data all the way for per pre-compensation data all the way, obtaining each terminal
Corresponding useful signal receives power；For any terminal in the multiple terminal, according to the 2N+ of the obtained terminal
Maximum useful signal in 1 road pre-compensation data receives power, determines the first appraising frequency bias value of the terminal, and according to described
The phase difference that maximum useful signal receives two frequency pilot signs of the corresponding pre-compensation data of power obtains the second appraising frequency bias value,
And then according to the first appraising frequency bias value and the second appraising frequency bias value, the appraising frequency bias value of the terminal is obtained, in turn
The appraising frequency bias value of the multiple terminal is obtained through the above way.The embodiment of the present invention, in the prior art
The technical problem that appraising frequency bias range is small existing for the frequency offset estimation method of PUCCHformat2/2a/2b, precision is low, proposes
A kind of effective frequency offset estimation method.It is pre- to obtain the road 2N+1 by carrying out frequency deviation pre-compensation to the upstream data got for base station
Offset data effectively expands the appraising frequency bias range of base station；The base station is according to the road the 2N+1 pre-compensation data of any terminal
Maximum useful signal receive power, determine the first appraising frequency bias value of the terminal, and then can be in the first appraising frequency bias value
On the basis of, the phase difference of two frequency pilot signs of the corresponding pre-compensation data of power is received according to maximum useful signal, obtains the
Two appraising frequency bias values, and the appraising frequency bias value of the terminal is obtained according to the first appraising frequency bias value and the second appraising frequency bias value, thus
By combining frequency deviation pre-compensation estimation with frequency pilot sign estimation, appraising frequency bias range is effectively expanded, and further mention
The high precision of appraising frequency bias can be improved base station to the demodulation ability of PUCCH, kept away using the method in the embodiment of the present invention
The frequency offset estimation method appraising frequency bias range that may be present for exempting from PUCCH format2/2a/2b in the prior art is small, precision is low
The technical issues of.
Detailed description of the invention
To describe the technical solutions in the embodiments of the present invention more clearly, make required in being described below to embodiment
Attached drawing is briefly introduced, it should be apparent that, drawings in the following description are only some embodiments of the invention, for this
For the those of ordinary skill in field, without any creative labor, it can also be obtained according to these attached drawings
Its attached drawing.
Fig. 1 is a kind of flow diagram of frequency offset estimation method provided in an embodiment of the present invention；
Fig. 2 is the useful signal for the i-th road pre-compensation data that the base station provided in the embodiment of the present invention determines first terminal
Receive the flow diagram of power；
Fig. 3 is a kind of structural schematic diagram of frequency offset estimating device provided in an embodiment of the present invention.
Specific embodiment
To make the objectives, technical solutions, and advantages of the present invention clearer, below in conjunction with attached drawing to the present invention make into
It is described in detail to one step, it is clear that described embodiments are only a part of the embodiments of the present invention, rather than whole implementation
Example.Based on the embodiments of the present invention, obtained by those of ordinary skill in the art without making creative efforts
All other embodiment, shall fall within the protection scope of the present invention.
In LTE system, there are many formats by PUCCH, such as format1/1a/1b, format2/2a/2b, format3/3a/
3b is respectively intended to transmit different types of uplink control data.The embodiment of the present invention, for PUCCH in the prior art
Frequency offset estimation method in format2/2a/2b may existing appraising frequency bias range it is small or appraising frequency bias precision is low asks
Topic, proposes a kind of effective frequency offset estimation method.
It should be noted that the frequency offset estimation method in the embodiment of the present invention be equally applicable to format1/1a/1b,
Format3/3a/3b, without limitation, the embodiment of the present invention is only to be applied to PUCCHformat2/2a/2b for specific application scenarios
In for be illustrated.
The embodiment of the present invention is described in further detail with reference to the accompanying drawings of the specification.
Fig. 1 is a kind of corresponding flow diagram of frequency offset estimation method provided in an embodiment of the present invention, as described in Figure 1, packet
Following steps 101 are included to step 104:
Step 101: base station obtains the uplink of the transmission of multiple terminals in the base station range in the set time period
Data；
Step 102: the base station carries out frequency deviation pre-compensation using default step value, to the upstream data, obtains 2N+1
Road pre-compensation data, N are integer；
Step 103: the base station obtains described according to every pre-compensation data all the way in the pre-compensation data of the road 2N+1
The useful signal per pre-compensation data all the way of multiple terminals receives power；
Step 104: the base station executes: for the first terminal in the multiple terminal according to the first terminal
The useful signal of the road 2N+1 pre-compensation data receives the maximum useful signal in power and receives power, obtains the first terminal
First appraising frequency bias value；And according to two pilot tones in the corresponding pre-compensation data of the maximum useful signal reception power
The phase difference of symbol obtains the second appraising frequency bias value of the first terminal；The base station is according to the first terminal
First appraising frequency bias value and the second appraising frequency bias value, obtain the appraising frequency bias value of the first terminal；The first terminal
For any terminal in the multiple terminal.
The embodiment of the present invention, for frequency existing for the frequency offset estimation method of PUCCH format2/2a/2b in the prior art
The technical problem that estimated range is small, precision is low partially, proposes a kind of effective frequency offset estimation method.Base station is by getting
Upstream data carries out frequency deviation pre-compensation, obtains the road 2N+1 pre-compensation data, effectively expands the appraising frequency bias range of base station；It is described
Base station receives power according to the maximum useful signal of the road the 2N+1 pre-compensation data of any terminal, determines the first frequency deviation of the terminal
Estimated value, and then the corresponding precompensation of power can be received according to maximum useful signal on the basis of the first appraising frequency bias value
The phase difference of two frequency pilot signs of data obtains the second appraising frequency bias value, and according to the first appraising frequency bias value and the second frequency deviation
Estimated value obtains the appraising frequency bias value of the terminal, to have by combining frequency deviation pre-compensation estimation with frequency pilot sign estimation
Effect expands appraising frequency bias range, and further increases the precision of appraising frequency bias, using the method in the embodiment of the present invention,
Base station be can be improved to the demodulation ability of PUCCH, avoid the frequency offset estimation method of PUCCH format2/2a/2b in the prior art
The technical problem that appraising frequency bias range that may be present is small, precision is low.
In the embodiment of the present invention, multiple terminals in base station range refer to using the base station as the multiple of serving BS
Terminal, each terminal in multiple terminals can send upstream data to base station.
In actual conditions, PUCCHformat2/ is carried out using the frequency offset estimation method in the prior art based on frequency pilot sign
When the appraising frequency bias of 2a/2b, the frequency deviation value in pilot tone frequency deviation estimated range can be accurately estimated, and pilot tones can not be estimated
Frequency deviation value other than inclined estimated range.Therefore, base station need to determine that the maximum frequency deviation in base station range is estimated in initial configuration
Calculation value, in order to take corresponding frequency offset estimation method: if maximum frequency deviation estimated value is less than or equal to default frequency deviation threshold value, illustrating base
The frequency deviation value of terminal is smaller in coverage area of standing, then the frequency offset estimation method based on frequency pilot sign in the prior art can be used and carry out
Appraising frequency bias illustrates that the frequency deviation value of terminal in base station range may if maximum frequency deviation estimated value is greater than default frequency deviation threshold value
It is larger, then it needs using the frequency offset estimation method provided in the embodiment of the present invention.
Wherein, presetting frequency deviation threshold value can be specifically arranged according to the actual situation by those skilled in the art, and the present invention is implemented
In example, in order to avoid the precision of unnecessary interference effect appraising frequency bias, default frequency deviation threshold value can be set as being slightly less than pilot tone
Appraising frequency bias range.
In the embodiment of the present invention, base station can be by estimating maximum frequency that the terminal in the base station range be likely to be breached
Partially, and using the maximum frequency deviation estimated as maximum frequency deviation estimated value.Maximum frequency deviation estimation can be specifically obtained by following formula
Value:
Wherein, fdmax be base station range in maximum frequency deviation estimated value, fc be base station range in terminal to
Base station sends the centre frequency of data, and v is the maximum movement speed that terminal is likely to be breached in base station range, and the maximum is mobile
Maximum speed when speed can be provided with the Maximum speed limit in section in reference base station coverage area or high-speed rail is run, c is the light velocity,
That is 3*108m/s。
By the above process, after base station determines that maximum frequency deviation estimated value is greater than default frequency deviation threshold value, subsequent be directed to should
All terminals in base station range are using the frequency offset estimation method in the embodiment of the present invention come estimating frequency offset value.
In step 101, base station obtains the upper line number of the transmission of multiple terminals in base station range in the set time period
According to the upstream data is the time-domain signal of setting time segment length.Wherein, set period of time can be by those skilled in the art
According to the actual needs setting of communication, set period of time can be 1ms in the embodiment of the present invention, if communication environment hair certainly
Changing, set period of time may be set to be other values.
In step 102, what default step value can be obtained according to pilot tone frequency deviation estimated range, it is preferable that default step value connects
It is bordering on pilot tone frequency deviation estimated range.
Base station can determine frequency deviation pre-compensation according to the maximum frequency deviation estimated value in default step value and base station range
The number 2N+1 of pre-compensation data afterwards.Specifically, the number 2N+1 of upstream data is maximum frequency deviation estimation after frequency deviation pre-compensation
Value divided by 2 extraordinarily 1 after rounding up after default step value as a result, so that after frequency deviation pre-compensation upstream data number
2N+1 is matched with default step value can cover maximum frequency deviation estimated value as far as possible.Alternatively, can also be by those skilled in the art
The value of N is rule of thumb set with actual conditions.Specifically without limitation.
Specifically, base station is according to the number 2N+1 of pre-compensation data after default step value and frequency deviation pre-compensation, to acquisition
The upstream data arrived carries out frequency deviation pre-compensation, using the upstream data got as starting point, forwardly and rearwardly carries out n times frequency deviation respectively
Precompensation is carried forward 1 frequency deviation pre-compensation, i.e. frequency deviation value increases a default step value, and available frequency deviation positive all the way is mended in advance
Data are repaid, carry out 1 precompensation backward, is i.e. frequency deviation value reduces by a default step value, and negative frequency deviation all the way can be obtained and pre-compensate for number
According to finally obtaining the road 2N+1 pre-compensation data.Wherein, the upstream data got in the pre-compensation data of the road 2N+1 including base station,
In the embodiment of the present invention as, which being regarded to, pre-compensation value is 0 pre-compensation data.
As an example it is assumed that base station determines that default step value is 1kHz, the maximum frequency deviation estimated value in base station range
For 3kHz, then it can determine N=3, the number 2N+1 of pre-compensation data is 7 tunnels, the upper line number that base station is got after frequency deviation pre-compensation
According to original frequency be 10kHz, base station carries out 7 road pre-compensation datas after frequency deviation pre-compensation to the upstream data of acquisition and is respectively
7kHz, 8kHz, 9kHz, 10kHz, 11kHz, 12kHz, 13kHz, wherein 10kHz is the benefit pre- all the way that frequency deviation pre-compensation value is 0
Repay data.
In step 103, base station obtains the multiple end according to every pre-compensation data all the way in the pre-compensation data of the road 2N+1
The initial useful signal per pre-compensation data all the way of each of end terminal receives power.Due to being obtained after frequency deviation pre-compensation
The road 2N+1 pre-compensation data in the upstream data that multiple terminals are remained as per pre-compensation data all the way, therefore, for 2N+1
Road the i-th road pre-compensation data Zhong pre-compensation data, base station execute following process:
I-th road pre-compensation data is transformed into frequency domain by base station, extracts PUCCH information, includes terminal in the PUCCH information
Utilize the PUCCH data information sent to base station and control information.Base station carries out channel using the PUCCH information extracted and estimates
It calculates, obtains frequency domain channel impulse response, and frequency domain channel impulse response is transformed into time domain, obtain and frequency domain channel impulse response
Corresponding time domain channel impulse response；Base station is responded according to the time domain channel impulse and the ZC sequence number of each terminal mentions
Take the corresponding time domain channel impulse response of each terminal.Wherein, the corresponding ZC sequence number of each terminal, the ZC of each terminal
Sequence number is generated by the same ZC root sequence by different cyclic shifts, is shown as not in time domain channel impulse response
Therefore same time delay can distinguish the data that different terminals are sent in uplink time domain data according to ZC sequence number.Wherein, each end
The ZC sequence number at end is to be issued by base station, therefore the ZC sequence number of each terminal is known for base station.Base station root
According to the ZC sequence number of each terminal, the data separating of terminals multiple in upstream data is come out, is obtained each in multiple terminals
The corresponding i-th road pre-compensation data of a terminal.
By taking the first terminal in multiple terminals as an example, be directed to the i-th road pre-compensation data of first terminal, base station according to when
Domain channel impulse response, the initial useful signal for obtaining the i-th road pre-compensation data of first terminal receive power P s ' (a, i)；Its
In, first terminal is any terminal in the multiple terminal, and a is the mark of first terminal, and the initial useful signal receives
Power P s ' (a, i) is square of the absolute value of the amplitude of the i-th road pre-compensation data of the first terminal a.
Then, base station receives power according to the initial useful signal of the i-th road pre-compensation data of first terminal a, it may be determined that
The useful signal of the i-th road pre-compensation data of first terminal a receives power out.
Fig. 2 is the useful signal for the i-th road pre-compensation data that the base station provided in the embodiment of the present invention determines first terminal
Receive the flow diagram of power.As shown in Figure 2, comprising:
Step 201, base station determines energy leakage value of the jth road pre-compensation data to the first terminal of second terminal；
Second terminal is any terminal in the multiple terminal in addition to first terminal；
Step 202, base station is according to the jth road pre-compensation data of the second terminal to the energy leakage of the first terminal
Value, determines the second terminal to the energy leakage value of the first terminal；
Step 203, base station receives function according to the corresponding initial useful signal of the i-th road pre-compensation data of the first terminal
Other terminals in rate and the multiple terminal in addition to first terminal determine institute to the energy leakage value of the first terminal
The corresponding useful signal of the i-th road pre-compensation data for stating first terminal receives power.
Specifically, in step 201, base station determines the jth road pre-compensation data of the second terminal as follows
To the energy leakage value of the first terminal:
LPs (a, b, j)=fac (a, b) * avg_dPs (b, j) ... formula (2)
Wherein, a is the mark of first terminal, and b is the mark of second terminal, and lPs (a, b, j) is the second terminal b's
Energy leakage value of the jth road pre-compensation data to the first terminal a；Fac (a, b) is the second terminal b to described first
The energy leakage factor of terminal a；Avg_dPs (b, j) is the jth road pre-compensation data of the second terminal b to other terminals
Averagely reveal energy.
In the embodiment of the present invention, base station can be according to the jth road pre-compensation data of second terminal before and after frequency deviation pre-compensation
Initial useful signal receives difference power, determines average leakage energy of the jth road pre-compensation data to other terminals of second terminal,
Detailed process is as follows:
(1) base station receives power and second terminal according to the initial useful signal of the jth road pre-compensation data of second terminal
Useful signal before precompensation receives power, obtains the jth road pre-compensation data of the second terminal before and after frequency deviation pre-compensation
Initial useful signal receive difference power, 1≤j≤2N+1:
DPs (b, j)=Ps ' (b, j)-Ps (b, 0) ... formula (3)
Wherein, dPs (b, j) is initial useful letter of the jth road pre-compensation data of second terminal b before and after frequency deviation pre-compensation
Number receive difference power, Ps ' (b, j) be second terminal b precompensation the road Houj pre-compensation data initial useful signal receive
Power, Ps (b, 0) are that the useful signal before second terminal b frequency deviation pre-compensation receives power, and the frequency deviation of as second terminal b is mended in advance
The initial useful signal for repaying the pre-compensation data that value is 0 receives power.
(2) base station connects according to initial useful signal of the jth road pre-compensation data of second terminal before and after frequency deviation pre-compensation
Difference power is received, determines average leakage energy of the jth road pre-compensation data to other terminals of second terminal:
Avg_dPs (b, j)-dPs (b, j)/COE1 ... formula (4)
Wherein, average leakage energy of the jth road pre-compensation data to other terminals that avg_dPs (b, j) is second terminal b
Amount, dP ε (b, j) are that initial useful signal of the jth road pre-compensation data of second terminal b before and after frequency deviation pre-compensation receives power
Difference, COE1 are the mean coefficient that those skilled in the art are arranged according to the actual situation in base station initial configuration, and can be according to reality
The variation of border situation adjusts.
In the embodiment of the present invention, base station can be poor according to the relative spacing of first terminal and the ZC sequence number of second terminal, really
Second terminal is determined to the energy leakage factor of first terminal, and detailed process is as follows:
(1) base station determines that the relative spacing of the ZC sequence number of first terminal and second terminal is poor:
DZC (a, b)=min (| aZC-bZC |, | NZC+bZC-aZC |)/NZC ... formula (5)
Wherein, dZC (a, b) is that the relative spacing of the ZC sequence number of first terminal a and second terminal b is poor；AZC is first whole
Hold the ZC sequence number of a；BZC is the ZC sequence number of second terminal b；NZC is the total length of ZC sequence number.
(2) base station is poor according to the relative spacing of first terminal and the ZC sequence number of second terminal, determines second terminal to
The energy leakage factor of one terminal:
Fac (a, b)=(1-dZC (a, b)) * COE2 ... formula (6)
Wherein, fac (a, b) is the energy leakage factor of the second terminal b to first terminal a, and dZC (a, b) is first terminal a
Poor with the relative spacing of the ZC sequence number of second terminal b, COE2 is that those skilled in the art carry out in the overlay area to base station
The leakage coefficient being arranged according to the actual situation when configuration, and can variation according to the actual situation adjust.
Specifically, in step 202, other terminals are equalled according to the jth road pre-compensation data of second terminal in base station
Energy and second terminal are revealed to the energy leakage factor of first terminal, determines the jth road pre-compensation data pair of second terminal
The energy leakage value of first terminal:
LPs (a, b, j)=fac (a, b) * avg_dPs (b, j) ... formula (2)
Wherein, energy leakage value of the jth road pre-compensation data to first terminal a that lPs (a, b, j) is second terminal b；
Fac (a, b) is the energy leakage factor of the second terminal b to first terminal a；It mends in advance on the jth road of avg_dPs (b, j) second terminal b
Data are repaid to the average leakage energy of other terminals；
Base station, to the energy leakage value of first terminal, determines second terminal according to the jth road pre-compensation data of second terminal
To the energy leakage value of first terminal, the second terminal is pre- to the road 2N+1 that the energy leakage value of first terminal is second terminal
Energy leakage value the sum of of the offset data to first terminal.Base station can determine second terminal to first terminal by following formula
Energy leakage value:
Wherein, lPs ' (a, b) is energy leakage value of the second terminal b to first terminal a, and lPs (a, b, j) is second terminal
Energy leakage value of the jth road pre-compensation data of b to first terminal a.
Specifically, in step 203, base station can determine its in multiple terminals in addition to first terminal by following formula
Energy leakage value of its terminal to the first terminal:
Wherein, lPs " (a) is energy leakage of the other terminals in multiple terminals in addition to first terminal a to first terminal a
Value, lPsk' (a, b) is the energy leakage value of k-th of terminal a in other terminals in multiple terminals in addition to first terminal a, M
For the number of other terminals in multiple terminals in addition to first terminal.
In turn, base station determines the useful signal reception power of the i-th road pre-compensation data of first terminal by following formula:
Ps (a, i)=Ps ' (a, i)-lPs " (a) ... formula (9)
Wherein, Ps (a, i) is that the useful signal of the i-th road pre-compensation data of first terminal a receives power, and Ps ' (a, i) is
The initial useful signal of the i-th road pre-compensation data of first terminal a receives power, and lPs " (a) is in multiple terminals except first is whole
Hold other terminals outside a to the energy leakage value of first terminal.
The embodiment of the present invention, for any terminal in multiple terminals, by estimating and eliminating other terminals due to frequency deviation
It estimates the energy leakage of the terminal that the useful signal of terminal receives power caused by precompensation, terminal room can be effectively reduced
Interference, improve useful signal receive power budget accuracy, and then improve the judgement to best frequency deviation pre-compensation standard
True property so that thick appraising frequency bias had not only expanded appraising frequency bias range, but also has enough appraising frequency bias precision.
In step 104, base station obtain through the above way in the road the 2N+1 pre-compensation data of first terminal per all the way
After useful signal receives power, determine that maximum useful signal receives power, and it is corresponding to obtain maximum useful signal reception power
Pre-compensation data precompensation frequency deviation value, which is the first appraising frequency bias value of first terminal.
Base station receives in a time slot or subframe in the corresponding pre-compensation data of power two using maximum useful signal
Phase difference between frequency pilot sign determines the second appraising frequency bias value, wherein between the second appraising frequency bias value and two frequency pilot signs
Phase difference it is directly proportional, be inversely proportional with the interval of two frequency pilot signs.
Further, the first appraising frequency bias value of first terminal and the sum of the second appraising frequency bias value are sought in base station, obtain
The appraising frequency bias value of one terminal.
By the above-mentioned means, the appraising frequency bias value of each of multiple terminals terminal can be obtained in base station.
The embodiment of the present invention, base station is by estimating the upstream data got using frequency deviation pre-compensation, energy leakage, having
After being obtained after the first appraising frequency bias value with the frequency offset estimation method that combines of signal reception power estimation, recycles and accorded with based on pilot tone
Number frequency offset estimation method to the upstream data carry out appraising frequency bias obtain the second appraising frequency bias value, while reached expansion frequency
Inclined estimated range and the purpose for improving frequency deviation precision, effectively prevent the frequency deviation of PUCCH format2/2a/2b in the prior art
The technical problem that evaluation method appraising frequency bias range that may be present is small, precision is low improves base station to the demodulation energy of PUCCH
Power.
A kind of frequency offset estimating device provided in an embodiment of the present invention, as shown in figure 3, one of embodiment of the present invention frequency deviation
Estimate that device includes:
Module 301 is obtained, for obtaining the uplink of the transmission of multiple terminals in base station range in the set time period
Data；
Pre-compensate for module 302, for using default step value, upstream data that the acquisition module 301 is got into
Row frequency deviation pre-compensation, obtains the road 2N+1 pre-compensation data, and N is integer；
Processing module 303, in the road the 2N+1 pre-compensation data for being determined according to the precompensation module 302 per all the way
Pre-compensation data, the useful signal per pre-compensation data all the way for obtaining the multiple terminal receive power；
Execution module 304, for executing: according to the processing module 303 for the first terminal in the multiple terminal
The useful signal of the road the 2N+1 pre-compensation data of determining first terminal receives the maximum useful signal in power and receives power, obtains
To the first appraising frequency bias value of the first terminal；And the corresponding precompensation of power is received according to the maximum useful signal
The phase difference of two frequency pilot signs in data obtains the second appraising frequency bias value of the first terminal；The base station is according to institute
The the first appraising frequency bias value and the second appraising frequency bias value for stating first terminal, obtain the appraising frequency bias of the first terminal
Value；The first terminal is any terminal in the multiple terminal.
Optionally, described device further includes determining module 305, and the determining module 305 is used for:
Before the acquisition module 301 obtains the upstream data of the transmission of multiple terminals in the base station range,
It determines the maximum frequency deviation estimated value in the base station range, and determines that the maximum frequency deviation in the base station range is estimated
Calculation value is greater than default frequency deviation threshold value.
Optionally, the processing module 303 is specifically used for:
According to every pre-compensation data all the way in the pre-compensation data of the road 2N+1, obtain each in the multiple terminal
The corresponding initial useful signal per pre-compensation data all the way of a terminal receives power；
Be directed to the first terminal, execute: the base station determines the jth road pre-compensation data of second terminal to described the
The energy leakage value of one terminal；The base station is according to the jth road pre-compensation data of the second terminal to the first terminal
Energy leakage value determines the second terminal to the energy leakage value of the first terminal；The base station is whole according to described first
Pre-compensation data corresponding initial useful signal in the i-th road Duan receives in power and the multiple terminal in addition to first terminal
Other terminals to the energy leakage value of the first terminal, determine that the i-th road pre-compensation data of the first terminal is corresponding
Useful signal receives power, and the second terminal is any terminal in the multiple terminal in addition to first terminal, 1≤i≤2N+
1,1≤j≤2N+1.
Optionally, the processing module 303 is also used to determine the jth road pre-compensation data pair of second terminal as follows
The energy leakage value of the first terminal:
LPs (a, b, j)=fac (a, b) * avg_dPs (b, j) ... formula (2)
Wherein, a is the mark of first terminal, and b is the mark of second terminal, and lPs (a, b, j) is the second terminal b's
Energy leakage value of the jth road pre-compensation data to the first terminal a；Fac (a, b) is the second terminal b to described first
The energy leakage factor of terminal a；Avg_dPs (b, j) is the jth road pre-compensation data of the second terminal b to other terminals
Averagely reveal energy.
Optionally, the processing module 303 is also used to determine the second terminal to the first terminal as follows
The energy leakage factor:
The base station is poor according to the relative spacing of the first terminal and the ZC sequence number of the second terminal, described in determination
The energy leakage factor of the second terminal to the first terminal；
The relative spacing difference of the first terminal and the ZC sequence number of the second terminal is determined as follows:
DZC (a, b)=min (| aZC-bZC |, | NZC+bZC-aZC |)/NZC ... formula (5)
Wherein, the relative spacing that dZC (a, b) is the first terminal a and the ZC sequence number of the second terminal b is poor；aZC
For the ZC sequence number of the first terminal a；BZC is the ZC sequence number of the second terminal b；NZC is the total length of ZC sequence number.
Optionally, the processing module 303 is also used to determine the jth road precompensation number of the second terminal as follows
According to the average leakage energy to other terminals:
The base station receives power and described according to the initial useful signal of the jth road pre-compensation data of the second terminal
Useful signal before second terminal frequency deviation pre-compensation receives power, obtains the jth road pre-compensation data of the second terminal in frequency
The initial useful signal of precompensation front and back partially receives difference power；
Initial useful letter of the base station according to the jth road pre-compensation data of the second terminal before and after frequency deviation pre-compensation
Number receive difference power, obtain average leakage energy of the jth road pre-compensation data to other terminals of second terminal.
In the embodiment of the present invention, base station carries out frequency deviation by the upstream data sent to the multiple terminals got and mends in advance
It repays, obtains the road 2N+1 pre-compensation data；According to the every pre-compensation data all the way for per pre-compensation data all the way, obtaining each terminal
Corresponding useful signal receives power；For any terminal in the multiple terminal, according to the 2N+ of the obtained terminal
Maximum useful signal in 1 road pre-compensation data receives power, determines the first appraising frequency bias value of the terminal, and according to described
The phase difference that maximum useful signal receives two frequency pilot signs of the corresponding pre-compensation data of power obtains the second appraising frequency bias value,
And then according to the first appraising frequency bias value and the second appraising frequency bias value, the appraising frequency bias value of the terminal is obtained, in turn
The appraising frequency bias value of the multiple terminal is obtained through the above way.The embodiment of the present invention, in the prior art
The technical problem that appraising frequency bias range is small existing for the frequency offset estimation method of PUCCHformat2/2a/2b, precision is low, proposes
A kind of effective frequency offset estimation method.It is pre- to obtain the road 2N+1 by carrying out frequency deviation pre-compensation to the upstream data got for base station
Offset data effectively expands the appraising frequency bias range of base station；The base station is according to the road the 2N+1 pre-compensation data of any terminal
Maximum useful signal receive power, determine the first appraising frequency bias value of the terminal, and then can be in the first appraising frequency bias value
On the basis of, the phase difference of two frequency pilot signs of the corresponding pre-compensation data of power is received according to maximum useful signal, obtains the
Two appraising frequency bias values, and the appraising frequency bias value of the terminal is obtained according to the first appraising frequency bias value and the second appraising frequency bias value, thus
By combining frequency deviation pre-compensation estimation with frequency pilot sign estimation, appraising frequency bias range is effectively expanded, and further mention
The high precision of appraising frequency bias can be improved base station to the demodulation ability of PUCCH, kept away using the method in the embodiment of the present invention
The frequency offset estimation method appraising frequency bias range that may be present for exempting from PUCCHformat2/2a/2b in the prior art is small, precision is low
Technical problem.
It should be understood by those skilled in the art that, the embodiment of the present invention can provide as method, system or computer program
Product.Therefore, complete hardware embodiment, complete software embodiment or reality combining software and hardware aspects can be used in the present invention
Apply the form of example.Moreover, it wherein includes the meter of computer usable program code that the present invention, which can be used at one or more,
The computer journey implemented in calculation machine usable storage medium (including but not limited to magnetic disk storage, CD-ROM, optical memory etc.)
The form of sequence product.
The present invention be referring to according to the method for the embodiment of the present invention, the process of equipment (system) and computer program product
Figure and/or block diagram describe.It should be understood that every one stream in flowchart and/or the block diagram can be realized by computer program instructions
The combination of process and/or box in journey and/or box and flowchart and/or the block diagram.It can provide these computer programs
Instruct the processor of general purpose computer, special purpose computer, Embedded Processor or other programmable data processing devices to produce
A raw machine, so that being generated by the instruction that computer or the processor of other programmable data processing devices execute for real
The function of being specified in present one process of flow chart or more than two one box of process and/or block diagram or more than two boxes
Device.
These computer program instructions, which may also be stored in, is able to guide computer or other programmable data processing devices with spy
Determine in the computer-readable memory that mode works, so that it includes referring to that instruction stored in the computer readable memory, which generates,
The manufacture of device is enabled, which realizes in one side of one process of flow chart or more than two processes and/or block diagram
The function of being specified in frame or more than two boxes.
These computer program instructions can also be loaded into computer or other programmable data processing devices, so that counting
Series of operation steps are executed on calculation machine or other programmable devices to generate computer implemented processing, thus in computer or
The instruction executed on other programmable devices is provided for realizing in one process of flow chart or more than two processes and/or box
The step of function of being specified in one box of figure or more than two boxes.
Although preferred embodiments of the present invention have been described, it is created once a person skilled in the art knows basic
Property concept, then additional changes and modifications may be made to these embodiments.So it includes excellent that the following claims are intended to be interpreted as
It selects embodiment and falls into all change and modification of the scope of the invention.
Obviously, various changes and modifications can be made to the invention without departing from essence of the invention by those skilled in the art
Mind and range.In this way, if these modifications and changes of the present invention belongs to the range of the claims in the present invention and its equivalent technologies
Within, then the present invention is also intended to include these modifications and variations.
Claims (10)
1. a kind of frequency offset estimation method, which is characterized in that the described method includes:
Base station obtains the upstream data of the transmission of multiple terminals in the base station range in the set time period；
The base station carries out frequency deviation pre-compensation using default step value, to the upstream data, obtains the road 2N+1 pre-compensation data,
N is integer；
The base station obtains the every of the multiple terminal according to every pre-compensation data all the way in the pre-compensation data of the road 2N+1
The useful signal of pre-compensation data receives power all the way, comprising:
The base station obtains in the multiple terminal according to every pre-compensation data all the way in the pre-compensation data of the road 2N+1
The corresponding initial useful signal per pre-compensation data all the way of each terminal receives power；The base station is directed to described first
Terminal, execute: the base station determines energy leakage value of the jth road pre-compensation data to the first terminal of second terminal；Institute
Base station is stated according to the jth road pre-compensation data of the second terminal to the energy leakage value of the first terminal, determines described
Energy leakage value of two terminals to the first terminal；The base station is according to the i-th road pre-compensation data pair of the first terminal
It is whole to described first that the initial useful signal answered receives other terminals in power and the multiple terminal in addition to first terminal
The energy leakage value at end determines that the corresponding useful signal of the i-th road pre-compensation data of the first terminal receives power, described the
Two terminals are any terminal in the multiple terminal in addition to first terminal, 1≤i≤2N+1,1≤j≤2N+1；
The base station is executed for the first terminal in the multiple terminal: being pre-compensated for according to the road 2N+1 of the first terminal
The useful signal of data receives the maximum useful signal in power and receives power, obtains the first appraising frequency bias of the first terminal
Value；And the phase difference of two frequency pilot signs in the corresponding pre-compensation data of power is received according to the maximum useful signal,
Obtain the second appraising frequency bias value of the first terminal；The base station is according to the first appraising frequency bias value of the first terminal
With the second appraising frequency bias value, the appraising frequency bias value of the first terminal is obtained；The first terminal is the multiple terminal
In any terminal.
2. the method as described in claim 1, which is characterized in that the base station is multiple in the acquisition base station range
Before the upstream data that terminal is sent, further includes:
The base station determines the maximum frequency deviation estimated value in the base station range, and determines in the base station range
Maximum frequency deviation estimated value be greater than default frequency deviation threshold value.
3. the method as described in claim 1, which is characterized in that the base station determines the of the second terminal as follows
Energy leakage value of the road the j pre-compensation data to the first terminal:
LPs (a, b, j)=fac (a, b) * avg_dPs (b, j)
Wherein, a is the mark of first terminal, and b is the mark of second terminal, and lPs (a, b, j) is the jth road of the second terminal b
Energy leakage value of the pre-compensation data to the first terminal a；Fac (a, b) is the second terminal b to the first terminal a
The energy leakage factor；Avg_dPs (b, j) is that the jth road pre-compensation data of the second terminal b lets out being averaged for other terminals
Reveal energy.
4. method as claimed in claim 3, which is characterized in that the base station determines the second terminal to institute as follows
State the energy leakage factor of first terminal:
The base station is poor according to the relative spacing of the first terminal and the ZC sequence number of the second terminal, determines described second
The energy leakage factor of the terminal to the first terminal；
The relative spacing difference of the first terminal and the ZC sequence number of the second terminal is determined as follows:
DZC (a, b)=min (| aZC-bZC |, | NZC+bZC-aZC |)/NZC
Wherein, the relative spacing that dZC (a, b) is the first terminal a and the ZC sequence number of the second terminal b is poor；AZC is institute
State the ZC sequence number of first terminal a；BZC is the ZC sequence number of the second terminal b；NZC is the total length of ZC sequence number.
5. method as claimed in claim 3, which is characterized in that the base station determines the of the second terminal as follows
Average leakage energy of the road the j pre-compensation data to other terminals:
The base station receives power and described second according to the initial useful signal of the jth road pre-compensation data of the second terminal
Useful signal before terminal frequency offset precompensation receives power, and the jth road pre-compensation data for obtaining the second terminal is pre- in frequency deviation
The initial useful signal of compensation front and back receives difference power；
The base station connects according to initial useful signal of the jth road pre-compensation data of the second terminal before and after frequency deviation pre-compensation
Difference power is received, average leakage energy of the jth road pre-compensation data to other terminals of second terminal is obtained.
6. a kind of frequency offset estimating device, which is characterized in that described device includes:
Module is obtained, for obtaining the upstream data of the transmission of multiple terminals in base station range in the set time period；
Module is pre-compensated for, for frequency deviation being carried out to the upstream data that the acquisition module is got and being mended in advance using default step value
It repays, obtains the road 2N+1 pre-compensation data, N is integer；
Processing module, for often pre-compensating for number all the way in the road the 2N+1 pre-compensation data according to the precompensation module determination
According to the useful signal per pre-compensation data all the way for obtaining the multiple terminal receives power；The processing module is specifically used for:
According to every pre-compensation data all the way in the pre-compensation data of the road 2N+1, each of the multiple terminal is obtained eventually
The corresponding initial useful signal per pre-compensation data all the way at end receives power；
Be directed to the first terminal, execute: the base station determines that the jth road pre-compensation data of second terminal is whole to described first
The energy leakage value at end；The base station is according to the jth road pre-compensation data of the second terminal to the energy of the first terminal
Leakage value determines the second terminal to the energy leakage value of the first terminal；The base station is according to the first terminal
The corresponding initial useful signal of i-th road pre-compensation data receives its in power and the multiple terminal in addition to first terminal
Its terminal determines that the i-th road pre-compensation data of the first terminal is corresponding useful to the energy leakage value of the first terminal
Signal reception power, the second terminal are any terminal in addition to first terminal in the multiple terminal, 1≤i≤2N+1,1
≤j≤2N+1；Execution module, for executing: being determined according to the processing module for the first terminal in the multiple terminal
First terminal the road 2N+1 pre-compensation data useful signal receive power in maximum useful signal receive power, obtain institute
State the first appraising frequency bias value of first terminal；And the corresponding pre-compensation data of power is received according to the maximum useful signal
In two frequency pilot signs phase difference, obtain the second appraising frequency bias value of the first terminal；The base station is according to described
The the first appraising frequency bias value and the second appraising frequency bias value of one terminal, obtain the appraising frequency bias value of the first terminal；
The first terminal is any terminal in the multiple terminal.
7. device as claimed in claim 6, which is characterized in that described device further includes determining module, and the determining module is used
In:
In the acquisition module before obtaining the upstream data that multiple terminals in the base station range are sent, institute is determined
The maximum frequency deviation estimated value in base station range is stated, and determines that the maximum frequency deviation estimated value in the base station range is big
In default frequency deviation threshold value.
8. device as claimed in claim 6, which is characterized in that the processing module is also used to determine that second is whole as follows
Energy leakage value of the road the Duanj pre-compensation data to the first terminal:
LPs (a, b, j)=fac (a, b) * avg_dPs (b, j)
Wherein, a is the mark of first terminal, and b is the mark of second terminal, and lPs (a, b, j) is the jth road of the second terminal b
Energy leakage value of the pre-compensation data to the first terminal a；Fac (a, b) is the second terminal b to the first terminal a
The energy leakage factor；Avg_dPs (b, j) is that the jth road pre-compensation data of the second terminal b lets out being averaged for other terminals
Reveal energy.
9. device as claimed in claim 8, which is characterized in that the processing module is also used to determine described as follows
The energy leakage factor of two terminals to the first terminal:
The base station is poor according to the relative spacing of the first terminal and the ZC sequence number of the second terminal, determines described second
The energy leakage factor of the terminal to the first terminal；
The relative spacing difference of the first terminal and the ZC sequence number of the second terminal is determined as follows:
DZC (a, b)=min (| aZC-bZC |, | NZC+bZC-aZC |)/NZC
Wherein, the relative spacing that dZC (a, b) is the first terminal a and the ZC sequence number of the second terminal b is poor；AZC is institute
State the ZC sequence number of first terminal a；BZC is the ZC sequence number of the second terminal b；NZC is the total length of ZC sequence number.
10. device as claimed in claim 8, which is characterized in that the processing module is also used to determine as follows described
Average leakage energy of the jth road pre-compensation data of second terminal to other terminals:
The base station receives power and described second according to the initial useful signal of the jth road pre-compensation data of the second terminal
Useful signal before terminal frequency offset precompensation receives power, and the jth road pre-compensation data for obtaining the second terminal is pre- in frequency deviation
The initial useful signal of compensation front and back receives difference power；
The base station connects according to initial useful signal of the jth road pre-compensation data of the second terminal before and after frequency deviation pre-compensation
Difference power is received, average leakage energy of the jth road pre-compensation data to other terminals of second terminal is obtained.
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