CN109803369A - Joint time-frequency estimation and compensation method, device and user equipment - Google Patents
Joint time-frequency estimation and compensation method, device and user equipment Download PDFInfo
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Abstract
The present invention provides a kind of estimation of joint time-frequency and compensation method, device and user equipment.The described method includes: when TRS and SSB is not present in current time slots, based on the time-domain sampling point data progress CTO and CFO compensation of CTO and CFO to current time slots after the CTO and CFO or loop filtering estimated on nearest TRS or SSB time slot before；When only existing TRS in current time slots, CTO and CFO after CTO and CFO or loop filtering based on TRS estimation carry out CTO and CFO compensation；When only existing SSB in current time slots, when SSB estimation CTO and CFO be less than or equal to before recently TRS time slot estimation CTO and CFO or loop filtering after CTO and CFO when, CTO and CFO before use after the CTO and CFO or loop filtering of TRS estimation recently carry out CTO and CFO compensation, otherwise carry out CTO and CFO using the CTO and CFO of SSB estimation and compensate；When existing simultaneously TRS and SSB in current time slots, then CTO and CFO after deriving corresponding CTO and CFO or use loop filtering according to TRS and the SSB CTO estimated and CFO carry out CTO and CFO and compensate.
Description
Technical field
The present invention relates to wireless communication technology field more particularly to a kind of joint time-frequency estimation and compensation method, device and
User equipment.
Background technique
In LTE (Long Term Evolution, long term evolution) system, base station can periodically send cell and refer to
Determine reference signal (Cell-specific Reference Signal, CRS), also referred to as public reference signal (Common
Reference Signal, CRS), user equipment (User Equipment, UE) by tracking this reference signal, in the time and
It is synchronous with base station holding in frequency.In other words, since the hardware differences of UE and base station, such as crystal oscillator are asynchronous, one is always had
Fixed time-frequency deviation, the CRS signal that UE is sent by the tracking base stations period are poor to calculate and correct frequency deviation at this time.Frequency deviation at this time
Difference can be referred to as carrier timing deviation (Carrier Timing Offset, CTO) and carrier frequency offset (Carrier again
Frequency Offset, CFO).
In 5G NR (New Radio, newly eat dishes without rice or wine) system be not present CRS signal, but in order to meet different application scene,
The demand of subordinate's scene needs different time-frequency track reference signals (Tracking Reference Signal, TRS) to carry out
Dynamically or semi-statically configure, it is same by providing high-precision time-frequency to UE to meet in the case where minimizing resource overhead
Step is to obtain optimal receiver performance.
It is generally basede on CRS in LTE system and obtains CTO and CFO estimated value, and again to next subframe after loop filtering
Data compensate.The design of TRS and CRS have many differences in 5G NR system, and the time-frequency density of TRS and period are different,
TRS is UE specific, and is existed using limitation (past estimated value can be not used in current time slots).Therefore, how to realize
Joint time-frequency estimation and compensation in 5G NR system are problems to be solved.
Summary of the invention
Joint time-frequency provided by the invention estimation and compensation method, device and user equipment, can be realized based on TRS and
The joint time-frequency of SSB estimates and compensation, to improve the receptivity of receiver.
In a first aspect, the present invention provides a kind of estimation of joint time-frequency and compensation method, comprising:
Judge in current time slots with the presence or absence of TRS and SSB；
If TRS and SSB is not present in current time slots, inclined based on the carrier timing estimated on nearest TRS or SSB time slot before
CTO and CFO after poor CTO and carrier frequency offset CFO or loop filtering carry out the time-domain sampling point data of current time slots
CTO and CFO compensation；
CTO and CFO if only existing TRS in current time slots, after CTO and CFO or loop filtering based on TRS estimation
CTO and CFO compensation is carried out to the time-domain sampling point data of current time slots；
If only existing SSB in current time slots, the TRS time slot estimation recently before the CTO and CFO of SSB estimation are less than or equal to
CTO and CFO perhaps CTO and CFO after loop filtering when use before TRS estimation recently CTO and CFO or loop filter
CTO and CFO after wave carry out CTO and CFO to the time-domain sampling point data of current time slots and compensate, otherwise using the CTO of SSB estimation
CTO and CFO is carried out with time-domain sampling point data of the CFO to current time slots to compensate；
If existing simultaneously TRS and SSB in current time slots, correspondence is derived according to TRS and the SSB CTO estimated and CFO
CTO and CFO or using after loop filtering CTO and CFO CTO and CFO is carried out to the time-domain sampling point data of current time slots
Compensation.
Optionally, the CTO estimated according to TRS and SSB and CFO derives corresponding CTO and CFO to current time slots
Time-domain sampling point data carry out CTO and CFO compensation include:
For CTO and CFO, when the estimated value of SSB is less than or equal to the estimated value of TRS, estimated value using TRS is to working as
The data of preceding time slot carry out time-frequency compensation.
Optionally, the CTO estimated according to TRS and SSB and CFO derives corresponding CTO and CFO to current time slots
Time-domain sampling point data carry out CTO and CFO compensation include:
For CTO and CFO, when the estimated value of SSB is greater than the estimated value of TRS, using the estimated value of SSB to current time slots
On TRS symbol data compensate, and based on compensated TRS symbol carry out again CTO and CFO estimation, calculate the estimation of SSB
The arithmetic sum of the estimated value of TRS after value and compensation, using calculated result as final CTO and CFO to the data of current time slots into
The compensation of row time-frequency.
Optionally, the CTO estimated according to TRS and SSB and CFO derives corresponding CTO and CFO to current time slots
Time-domain sampling point data carry out CTO and CFO compensation include:
For CTO and CFO, when the estimated value of SSB is greater than the estimated value of TRS, estimated value and TRS based on SSB are estimated
Evaluation calculates final TRS estimated value, carries out time-frequency benefit according to data of the final TRS estimated value to current time slots
It repays.
Optionally, the estimated value of the estimated value and TRS based on SSB calculates final TRS estimated value and includes:
Determine the estimated value Δ of SSBSSBExpression formula are as follows:
Wherein, ρSSBFor linear coefficient,For phase angle, range is (- ∞ ,+∞)；
Determine the estimated value Δ of TRSTRSExpression formula are as follows:
Wherein, ρTRSFor linear coefficient,For phase angle, range is [- π ,+π]；
By formulaDetermine the corresponding phase angle of the estimated value of SSBExpression formula are as follows:
Wherein, σ isIn include 2 π number, θSSBFor remainder；
Determine the corresponding phase angle of the estimated value of final TRSExpression formula are as follows:
Final TRS estimated value is calculated according to following formula:
Second aspect, the present invention provide a kind of estimation of joint time-frequency and compensation device, comprising:
Judging unit, for judging whether exist simultaneously TRS and SSB in current time slots；
First compensating unit, for being based on before TRS or SSB time slot recently when TRS and SSB is not present in current time slots
CTO and CFO after the CTO and CFO or loop filtering of upper estimation to the time-domain sampling point data of current time slots carry out CTO and
CFO compensation；
Second compensating unit, when for only existing TRS in current time slots, CTO and CFO or ring based on TRS estimation
Road filtered CTO and CFO carries out CTO and CFO to the time-domain sampling point data of current time slots and compensates；
Third compensating unit, when for only existing SSB in current time slots, when the CTO and CFO of SSB estimation are less than or equal to
When CTO and CFO after the CTO and CFO or loop filtering of nearest TRS time slot estimation before, TRS estimation recently before use
CTO and CFO after CTO and CFO or loop filtering carry out CTO and CFO to the time-domain sampling point data of current time slots and compensate, no
Then CTO and CFO is carried out to the time-domain sampling point data of current time slots using the CTO and CFO of SSB estimation to compensate；
4th compensating unit when for existing simultaneously TRS and SSB in current time slots, is estimated according to TRS and SSB
CTO and CFO derive corresponding CTO and CFO or using after loop filtering CTO and CFO to the time-domain samplings of current time slots
Point data carries out CTO and CFO compensation.
Optionally, the 4th compensating unit is used for for CTO and CFO, when the estimated value of SSB is less than or equal to TRS's
When estimated value, time-frequency compensation is carried out to the data of current time slots using the estimated value of TRS.
Optionally, the 4th compensating unit is used for for CTO and CFO, when the estimated value of SSB is greater than the estimated value of TRS
When, the TRS symbol data in current time slots is compensated using the estimated value of SSB, and based on compensated TRS symbol again into
Row CTO and CFO estimation, calculate the arithmetic sum of the estimated value of TRS after the estimated value and compensation of SSB, using calculated result as finally
CTO and CFO time-frequency compensation is carried out to the data of current time slots.
Optionally, the 4th compensating unit is used for for CTO and CFO, when the estimated value of SSB is greater than the estimated value of TRS
When, the estimated value of estimated value and TRS based on SSB calculates final TRS estimated value, according to the final TRS estimated value
Time-frequency compensation is carried out to the data of current time slots.
Optionally, the 4th compensating unit, for determining the estimated value Δ of SSBSSBExpression formula are as follows:
Wherein, ρSSBFor linear coefficient,For phase angle, range is (- ∞ ,+∞)；
Determine the estimated value Δ of TRSTRSExpression formula are as follows:
Wherein, ρTRSFor linear coefficient,For phase angle, range is [- π ,+π]；
By formulaDetermine the corresponding phase angle of the estimated value of SSBExpression formula are as follows:
Wherein, σ isIn include 2 π number, θSSBFor remainder；
Determine the corresponding phase angle of the estimated value of final TRSExpression formula are as follows:
Final TRS estimated value is calculated according to following formula:
The third aspect, the present invention provide a kind of user equipment, and the user equipment includes above-mentioned joint time-frequency estimation and mends
Repay device.
Joint time-frequency provided in an embodiment of the present invention estimation and compensation method, device and user equipment, current time slots not
There are when TRS and SSB, based on after the CTO and CFO or loop filtering estimated on nearest TRS or SSB time slot before CTO and
CFO carries out CTO and CFO to the time-domain sampling point data of current time slots and compensates；When only existing TRS in current time slots, it is based on TRS
CTO and CFO after the CTO and CFO or loop filtering of estimation carry out CTO and CFO to the time-domain sampling point data of current time slots
Compensation；When only existing SSB in current time slots, the TRS time slot estimation recently before the CTO and CFO of SSB estimation are less than or equal to
CTO and CFO perhaps CTO and CFO after loop filtering when use before TRS estimation recently CTO and CFO or loop filtering
CTO and CFO afterwards carries out CTO and CFO to the time-domain sampling point datas of current time slots and compensates, otherwise using the CTO of SSB estimation and
CFO carries out CTO and CFO to the time-domain sampling point data of current time slots and compensates；When existing simultaneously TRS and SSB in current time slots,
Corresponding CTO and CFO are derived according to TRS and the SSB CTO estimated and CFO or using the CTO and CFO after loop filtering
CTO and CFO compensation is carried out to the time-domain sampling point data of current time slots, so as to realize the joint time-frequency based on TRS and SSB
Estimation and compensation, to improve the receptivity of receiver.
Detailed description of the invention
Fig. 1 is the flow chart of the estimation of one embodiment of the invention joint time-frequency and compensation method；
Fig. 2 is the structural schematic diagram of the estimation of one embodiment of the invention joint time-frequency and compensation device.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is only
It is only a part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, ordinary skill
Personnel's every other embodiment obtained without making creative work, shall fall within the protection scope of the present invention.
The embodiment of the present invention provides a kind of estimation of joint time-frequency and compensation method, as shown in Figure 1, which comprises
S11, judge that (Synchronization Signal Block is synchronized with the presence or absence of TRS and SSB in current time slots
Block), if TRS and SSB is not present in current time slots, then follow the steps S12；If only existing TRS in current time slots, execute
Step S13；If only existing SSB in current time slots, S14 is thened follow the steps；If existing simultaneously TRS and SSB in current time slots, hold
Row step S15.
S12, based on the carrier timing deviation CTO and carrier frequency offset CFO estimated on nearest TRS or SSB time slot before
Or the time-domain sampling point data progress CTO and CFO compensation of CTO and CFO to current time slots after loop filtering；
CTO and CFO after S13, CTO and CFO or loop filtering based on TRS estimation is to the time-domain samplings of current time slots
Point data carries out CTO and CFO compensation.
S14, the CTO that TRS time slot is estimated recently before the CTO and CFO of SSB estimation are less than or equal to and CFO or loop
When filtered CTO and CFO, CTO and CFO before use after the CTO and CFO or loop filtering of TRS estimation recently are to working as
The time-domain sampling point data of preceding time slot carries out CTO and CFO compensation, otherwise using the CTO and CFO of SSB estimation to current time slots
Time-domain sampling point data carries out CTO and CFO compensation；
S15, corresponding CTO and CFO are derived according to TRS and the SSB CTO estimated and CFO or uses loop filtering
CTO and CFO afterwards carries out CTO and CFO to the time-domain sampling point data of current time slots and compensates.
Specifically, when SSB estimated value is less than or equal to TRS estimated value, the CTO after loop filtering can be used and CFO pairs
The time-domain sampling point data of current time slots carries out CTO and CFO compensation.
Joint time-frequency estimation and compensation method provided in an embodiment of the present invention, when TRS and SSB is not present in current time slots,
Based on after the CTO and CFO or loop filtering estimated on nearest TRS or SSB time slot before CTO and CFO to current time slots
Time-domain sampling point data carries out CTO and CFO compensation；When only existing TRS in current time slots, CTO and CFO based on TRS estimation
Or the time-domain sampling point data progress CTO and CFO compensation of CTO and CFO to current time slots after loop filtering；In current time slots
On when only existing SSB, the CTO and CFO or ring of TRS time slot estimation recently before the CTO and CFO of SSB estimation are less than or equal to
When filtered CTO and CFO in road, the CTO before use after the CTO and CFO or loop filtering of TRS estimation recently and CFO pairs
The time-domain sampling point data of current time slots carries out CTO and CFO compensation, otherwise using the CTO and CFO of SSB estimation to current time slots
Time-domain sampling point data carry out CTO and CFO compensation；When existing simultaneously TRS and SSB in current time slots, according to TRS and SSB
The CTO and CFO estimated derive corresponding CTO and CFO or using after loop filtering CTO and CFO to current time slots
Time-domain sampling point data carries out CTO and CFO compensation, so as to realize joint time-frequency estimation and the compensation based on TRS and SSB,
To improve the receptivity of receiver.
Specifically, when only existing TRS or SSB in current time slots, based on TRS or the SSB CTO estimated and CFO to working as
The time-domain sampling point data of preceding time slot carries out CTO and CFO compensation, and wherein the time-domain sampling point data needs of current time slots save
Come, compensated data carry out other operations such as subsequent channel estimation, demodulation and decoding again.
Specifically, when existing simultaneously TRS and SSB in current time slots, corresponding CTO is estimated based on TRS and SSB respectively
And CFO, when SSB estimated value (be suitable for CTO and CFO) is less than or equal to TRS estimated value, only with TRS estimated value to working as
The data of preceding time slot carry out time-frequency compensation；When SSB estimated value is greater than TRS estimated value, following two processing scheme can be used:
(1) the TRS symbol data in current time slots is compensated using the estimated value of SSB, is then based on compensated
TRS symbol carries out CTO and CFO estimation again, calculates the arithmetic sum of the estimated value of TRS after the estimated value and compensation of SSB, ties calculating
Fruit carries out time-frequency compensation as the data of final CTO and CFO to current time slots.
It (2) is linear change relative to phase angle due to the estimated value of SSB, but its estimated accuracy is much smaller than TRS, and
The estimated accuracy of TRS is preferable, but the corresponding phase angle of its estimated value is that the periodic linear based on 2 π changes, it is possible to be based on
SSB estimated value and TRS estimated value derive the actual estimated value of accurate TRS.Detailed process is as follows:
Estimation based on SSB determines estimated value expression formula are as follows:
Wherein, ΔSSBIndicate SSB estimated value (being suitable for CTO and CFO), ρSSBIndicate linear coefficient (when CTO and CFO estimate
With different coefficients),Indicate phase angle, range is (- ∞ ,+∞)；
Estimation based on TRS determines estimated value expression formula are as follows:
Wherein, ΔTRSIndicate TRS estimated value (being suitable for CTO and CFO), ρTRSIndicate linear coefficient (when CTO and CFO estimate
With different coefficients),Indicate phase angle, range is [- π ,+π]；
To indicate to be represented by following formula comprising σ 2 π in the phase angle SSB:
Wherein θSSBFor remainder.
And the more accurate phase angle TRSIt is represented by following formula:
Based on formula (4), the actual estimated value of more accurate TRS is determined are as follows:
The actual estimated value of the more accurate TRS finally obtained based on formula (5) carries out time-frequency to the data of current time slots
Compensation.
The embodiment of the present invention also provides a kind of estimation of joint time-frequency and compensation device, as shown in Fig. 2, described device includes:
Judging unit 11, for judging whether exist simultaneously TRS and SSB in current time slots；
First compensating unit 12, for when current time slots are there is no TRS or SSB recently when TRS and SSB, is based on before
CTO and CFO after the CTO and CFO or loop filtering that estimate in gap to the time-domain sampling point data of current time slots carry out CTO and
CFO compensation；
Second compensating unit 13, when for only existing TRS in current time slots, based on TRS estimation CTO and CFO or
CTO and CFO after loop filtering carry out CTO and CFO to the time-domain sampling point data of current time slots and compensate；
Third compensating unit 14, when for only existing SSB in current time slots, when SSB estimation CTO and CFO be less than etc.
When CTO and CFO after the CTO and CFO or loop filtering of the estimation of nearest TRS time slot before, TRS estimation recently before use
CTO and CFO or loop filtering after CTO and CFO CTO and CFO is carried out to the time-domain sampling point datas of current time slots and is compensated,
Otherwise CTO and CFO is carried out to the time-domain sampling point data of current time slots using the CTO and CFO of SSB estimation to compensate；
4th compensating unit 15 estimates when for existing simultaneously TRS and SSB in current time slots according to TRS and SSB
CTO and CFO derive corresponding CTO and CFO or using after loop filtering CTO and CFO the time domain of current time slots is adopted
Sampling point data carry out CTO and CFO compensation.
Joint time-frequency estimation provided in an embodiment of the present invention and compensation device, when TRS and SSB is not present in current time slots,
Based on after the CTO and CFO or loop filtering estimated on nearest TRS or SSB time slot before CTO and CFO to current time slots
Time-domain sampling point data carries out CTO and CFO compensation；When only existing TRS in current time slots, CTO and CFO based on TRS estimation
Or the time-domain sampling point data progress CTO and CFO compensation of CTO and CFO to current time slots after loop filtering；When on time slot
When only existing SSB, the CTO and CFO or loop of TRS time slot estimation recently before the CTO and CFO of SSB estimation are less than or equal to
When filtered CTO and CFO, CTO and CFO before use after the CTO and CFO or loop filtering of TRS estimation recently are to working as
The time-domain sampling point data of preceding time slot carries out CTO and CFO compensation, otherwise using the CTO and CFO of SSB estimation to current time slots
Time-domain sampling point data carries out CTO and CFO compensation；When existing simultaneously TRS and SSB in current time slots, estimated according to TRS and SSB
The CTO and CFO counted out derive corresponding CTO and CFO or using after loop filtering CTO and CFO to current time slots when
Domain sample point data carries out CTO and CFO compensation, so as to realize joint time-frequency estimation and the compensation based on TRS and SSB, from
And improve the receptivity of receiver.
Optionally, the 4th compensating unit 15 is used for for CTO and CFO, when the estimated value of SSB is less than or equal to TRS
Estimated value when, time-frequency compensation is carried out to the data of current time slots using the estimated value of TRS.
Optionally, the 4th compensating unit 15 is used for for CTO and CFO, when the estimated value of SSB is greater than the estimation of TRS
When value, the TRS symbol data in current time slots is compensated using the estimated value of SSB, and again based on compensated TRS symbol
CTO and CFO estimation is carried out, the arithmetic sum of the estimated value of TRS after the estimated value and compensation of SSB is calculated, using calculated result as most
Whole CTO and CFO carries out time-frequency compensation to the data of current time slots.
Optionally, the 4th compensating unit 15 is used for for CTO and CFO, when the estimated value of SSB is greater than the estimation of TRS
When value, the estimated value of estimated value and TRS based on SSB calculates final TRS estimated value, is estimated according to the final TRS
It is worth and time-frequency compensation is carried out to the data of current time slots.
Optionally, the 4th compensating unit 15, for determining the estimated value Δ of SSBSSBExpression formula are as follows:
Wherein, ρSSBFor linear coefficient,For phase angle, range is (- ∞ ,+∞)；
Determine the estimated value Δ of TRSTRSExpression formula are as follows:
Wherein, ρTRSFor linear coefficient,For phase angle, range is [- π ,+π]；
By formulaDetermine the corresponding phase angle of the estimated value of SSBExpression formula are as follows:
Wherein, σ isIn include 2 π number, θSSBFor remainder；
Determine the corresponding phase angle of the estimated value of final TRSExpression formula are as follows:
Final TRS estimated value is calculated according to following formula:
The device of the present embodiment can be used for executing the technical solution of above method embodiment, realization principle and technology
Effect is similar, and details are not described herein again.
The embodiment of the present invention also provides a kind of user equipment, and the user equipment includes above-mentioned joint time-frequency estimation and compensation
Device.
Those of ordinary skill in the art will appreciate that realizing all or part of the process in above-described embodiment method, being can be with
Relevant hardware is instructed to complete by computer program, the program can be stored in a computer-readable storage medium
In, the program is when being executed, it may include such as the process of the embodiment of above-mentioned each method.Wherein, the storage medium can be magnetic
Dish, CD, read-only memory (Read-Only Memory, ROM) or random access memory (Random Access
Memory, RAM) etc..
The above description is merely a specific embodiment, but scope of protection of the present invention is not limited thereto, any
In the technical scope disclosed by the present invention, any changes or substitutions that can be easily thought of by those familiar with the art, all answers
It is included within the scope of the present invention.Therefore, protection scope of the present invention should be subject to the protection scope in claims.
Claims (11)
1. a kind of joint time-frequency estimation and compensation method characterized by comprising
Judge in current time slots with the presence or absence of track reference signal TRS and synchronization signal block SSB；
If TRS and SSB is not present in current time slots, based on the carrier timing deviation estimated on nearest TRS or SSB time slot before
CTO and CFO after CTO and carrier frequency offset CFO or loop filtering carry out CTO to the time-domain sampling point data of current time slots
It is compensated with CFO；
If only existing TRS in current time slots, the CTO and CFO after CTO and CFO or loop filtering based on TRS estimation are to working as
The time-domain sampling point data of preceding time slot carries out CTO and CFO compensation；
If only existing SSB in current time slots, the CTO of TRS time slot estimation recently before the CTO and CFO of SSB estimation are less than or equal to
After the CTO and CFO or loop filtering of TRS estimation recently before use when CTO and CFO after CFO perhaps loop filtering
CTO and CFO carries out CTO and CFO to the time-domain sampling point data of current time slots and compensates, otherwise using the CTO and CFO of SSB estimation
CTO and CFO compensation is carried out to the time-domain sampling point data of current time slots；
If existing simultaneously TRS and SSB in current time slots, derived according to TRS and the SSB CTO estimated and CFO corresponding
CTO and CFO or using after loop filtering CTO and CFO CTO and CFO is carried out to the time-domain sampling point data of current time slots and is mended
It repays.
2. the method according to claim 1, wherein the CTO estimated according to TRS and SSB and CFO is derived
Corresponding CTO and CFO includes: to the time-domain sampling point data progress CTO and CFO compensation of current time slots out
For CTO and CFO, when the estimated value of SSB is less than or equal to the estimated value of TRS, using TRS estimated value to it is current when
The data of gap carry out time-frequency compensation.
3. the method according to claim 1, wherein the CTO estimated according to TRS and SSB and CFO is derived
Corresponding CTO and CFO includes: to the time-domain sampling point data progress CTO and CFO compensation of current time slots out
For CTO and CFO, when the estimated value of SSB is greater than the estimated value of TRS, using the estimated value of SSB in current time slots
TRS symbol data compensates, and based on compensated TRS symbol carry out again CTO and CFO estimation, calculate SSB estimated value and
The arithmetic sum of the estimated value of TRS after compensation, when calculated result is carried out as the data of final CTO and CFO to current time slots
Frequency compensates.
4. the method according to claim 1, wherein the CTO estimated according to TRS and SSB and CFO is derived
Corresponding CTO and CFO includes: to the time-domain sampling point data progress CTO and CFO compensation of current time slots out
For CTO and CFO, when the estimated value of SSB is greater than the estimated value of TRS, the estimated value of estimated value and TRS based on SSB
Final TRS estimated value is calculated, carries out time-frequency compensation according to data of the final TRS estimated value to current time slots.
5. according to the method described in claim 4, it is characterized in that, the estimated value of the estimated value and TRS based on SSB calculates
Final TRS estimated value includes: out
Determine the estimated value Δ of SSBSSBExpression formula are as follows:
Wherein, ρSSBFor linear coefficient,For phase angle, range is (- ∞ ,+∞)；
Determine the estimated value Δ of TRSTRSExpression formula are as follows:
Wherein, ρTRSFor linear coefficient,For phase angle, range is [- π ,+π]；
By formulaDetermine the corresponding phase angle of the estimated value of SSBExpression formula are as follows:
Wherein, σ isIn include 2 π number, θSSBFor remainder；
Determine the corresponding phase angle of the estimated value of final TRSExpression formula are as follows:
Final TRS estimated value is calculated according to following formula:
6. a kind of joint time-frequency estimation and compensation device characterized by comprising
Judging unit, for judging in current time slots with the presence or absence of TRS and SSB；
First compensating unit, for when TRS and SSB is not present in current time slots, based on estimating on nearest TRS or SSB time slot before
CTO and CFO after the CTO and CFO or loop filtering of meter carry out CTO and CFO to the time-domain sampling point data of current time slots and mend
It repays；
Second compensating unit, when for only existing TRS in current time slots, CTO and CFO or loop filter based on TRS estimation
CTO and CFO after wave carry out CTO and CFO to the time-domain sampling point data of current time slots and compensate；
Third compensating unit, when for only existing SSB in current time slots, before the CTO and CFO of SSB estimation are less than or equal to
When CTO and CFO after the CTO and CFO or loop filtering of nearest TRS time slot estimation, the CTO of TRS estimation recently before use
With after CFO or loop filtering CTO and CFO CTO and CFO is carried out to the time-domain sampling point datas of current time slots and is compensated, otherwise
CTO and CFO is carried out to the time-domain sampling point data of current time slots using the CTO and CFO of SSB estimation to compensate；
4th compensating unit, when for existing simultaneously TRS and SSB in current time slots, the CTO that is estimated according to TRS and SSB and
CFO derive corresponding CTO and CFO or using after loop filtering CTO and CFO to the time-domain sampling point datas of current time slots
Carry out CTO and CFO compensation.
7. device according to claim 6, which is characterized in that second compensating unit, for for CTO and CFO, when
When the estimated value of SSB is less than or equal to the estimated value of TRS, time-frequency benefit is carried out to the data of current time slots using the estimated value of TRS
It repays.
8. device according to claim 6, which is characterized in that second compensating unit, for for CTO and CFO, when
When the estimated value of SSB is greater than the estimated value of TRS, the TRS symbol data in current time slots is mended using the estimated value of SSB
It repays, and CTO and CFO estimation is carried out based on compensated TRS symbol again, calculate the estimated value of TRS after the estimated value and compensation of SSB
Arithmetic sum, time-frequency compensation is carried out to the data of current time slots using calculated result as final CTO and CFO.
9. device according to claim 6, which is characterized in that second compensating unit, for for CTO and CFO, when
When the estimated value of SSB is greater than the estimated value of TRS, the estimated value of estimated value and TRS based on SSB calculates final TRS estimation
Value carries out time-frequency compensation according to data of the final TRS estimated value to current time slots.
10. device according to claim 9, which is characterized in that second compensating unit, for determining the estimation of SSB
It is worth ΔSSBExpression formula are as follows:
Wherein, ρSSBFor linear coefficient,For phase angle, range is (- ∞ ,+∞)；
Determine the estimated value Δ of TRSTRSExpression formula are as follows:
Wherein, ρTRSFor linear coefficient,For phase angle, range is [- π ,+π]；
By formulaDetermine the corresponding phase angle of the estimated value of SSBExpression formula are as follows:
Wherein, σ isIn include 2 π number, θSSBFor remainder；
Determine the corresponding phase angle of the estimated value of final TRSExpression formula are as follows:
Final TRS estimated value is calculated according to following formula:
11. a kind of user equipment, which is characterized in that the user equipment includes as described in any one of claim 6 to 10
Joint time-frequency estimation and compensation device.
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