CN106534019A - Cell measurement method and device, and user equipment - Google Patents
Cell measurement method and device, and user equipment Download PDFInfo
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- CN106534019A CN106534019A CN201510582673.7A CN201510582673A CN106534019A CN 106534019 A CN106534019 A CN 106534019A CN 201510582673 A CN201510582673 A CN 201510582673A CN 106534019 A CN106534019 A CN 106534019A
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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
- H04L27/2657—Carrier synchronisation
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L25/00—Baseband systems
- H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
- H04L25/0202—Channel estimation
- H04L25/0224—Channel estimation using sounding signals
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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
- H04L27/2662—Symbol synchronisation
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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
- H04L27/2668—Details of algorithms
- H04L27/2669—Details of algorithms characterised by the domain of operation
- H04L27/2671—Time domain
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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
- H04L27/2668—Details of algorithms
- H04L27/2669—Details of algorithms characterised by the domain of operation
- H04L27/2672—Frequency domain
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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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Abstract
The invention discloses a cell measurement method, a cell measurement device, and user equipment. The method comprises the steps of acquiring a frequency domain signal by performing Fourier transform on a received time domain baseband signal; acquiring an estimated channel value and an estimated noise value of a frequency domain reference signal sub-carrier point by performing channel estimation on a reference signal in the frequency domain signal; acquiring an estimated frequency offset value by performing frequency offset estimation by using the estimated channel values of the reference signal sub-carrier points at the same positions of different OFDM symbols; using a difference acquired by subtracting the estimated noise value from an average value to serve as a reference signal reception power value of a cell to be measured. By using the scheme of the method and the device provided by the invention, frequency offset resistant performance of a measure result can be enhanced, and robustness of the same can be improved.
Description
Technical field
The present invention relates to communication technical field, more particularly to a kind of method of cell measurement, device and user
Equipment.
Background technology
The development of mobile communication has added data service transition from initial speech business to speech business, and
Data service presents obvious acceleration mode, and increasing user adds 3G (Third Generation) Moblie now
(3G) grid.For more preferable mobile data experience, the transmittability of 3G systems gradually shows
Go out deficiency, then the long evolving system (Long Term Evolution, LTE) of 3G systems arises at the historic moment.
LTE is improved and is enhanced the aerial access technology of 3G, using OFDM (Orthogonal
Frequency Division Multiplexing, OFDM) technology and multiple-input, multiple-output (Multiple-Input
Multiple-Output, MIMO) technology as its wireless network evolution sole criterion, design most relative superiority or inferiority
Scanning frequency rate 100Mbps, upstream rate 50Mbps.LTE technologies will greatly promote user to mobile communication business
Experience, be that operator brings more technologies and cost advantage.Meanwhile, the appearance of LTE technologies is also consolidated
The leading position of legacy cellular mobile technology.
In mobile radio system, the Seamless Mobile of user equipment (User Equipment, UE) is
Principal character.UE states in a network are divided into idle condition and connection status, therefore the mobile management of UE
Mobile management under the mobile management being broadly divided under idle condition and connection status.Shifting under idle condition
It is dynamic to be mainly by cell reselection to realize, independently carried out by UE；Movement under connection status is mainly logical
Cross cell switching to realize, carried out by network side (eNodeB) control.As cell reselection and cell are cut
The foundation changed is exactly UE to Serving cell and the measurement result of adjacent cell, therefore measurement result is for realizing UE
Seamless Mobile it is most important.
At present, the measuring method of cell provides frequency by other modules beyond measurement apparatus for measurement result
Believe one side only breath.
But, this cell measuring method is likely to result in the performance of the anti-frequency deviation of measurement result and reduces, and drops
Low robustness.
The content of the invention
The problem that the present invention is solved is the performance of the anti-frequency deviation for lifting measurement result, and improves robustness.
For solving the above problems, the present invention provides a kind of method of cell measurement, and methods described includes：
Time domain baseband signals to receiving carry out Fourier transformation and obtain frequency-region signal；
Channel estimation is carried out to the reference signal in the frequency-region signal obtains the frequency domain reference signal load
The channel estimation value of wave point and noise estimation value；
Carried out using the channel estimation value of the reference signal subcarrier point of the same position of different OFDM symbols
Offset estimation, obtains offset estimation value；
Frequency deviation compensation is carried out to the time domain baseband signals for receiving according to the offset estimation value；
Ask for the performance number of channel estimation value of the reference signal subcarrier point after the frequency deviation compensation simultaneously
Take the mean value of the performance number；
The mean value is deducted into the difference that the noise estimation value is obtained, as the cell to be measured
Reference Signal Received Power value.
Alternatively, the offset estimation, including：
By the channel estimation value of the reference signal subcarrier point of the same position of the different OFDM symbols altogether
Yoke is multiplied, and obtains the first end value；
The offset estimation value is obtained according to the phase information of first end value.
Alternatively, the offset estimation, including：
Wherein Δ f is offset estimation value, and Dt is the reference
At the interval of frequency domain, L is the number of the reference signal to signal, and N is the resource in the bandwidth for measuring
The number of block, k and l represent the symbol sequence number with the reference signal and OFDM sequence numbers, Hp respectivelyK, l
For the channel estimation value of the reference signal subcarrier point.
Alternatively, methods described also includes：The frequency deviation offset is filtered.
Alternatively, methods described also includes：
Carried out using the channel estimation value of the reference signal subcarrier point of adjacent position in same OFDM symbol
Time offset estimation；
When being carried out to the channel estimation value of the frequency domain reference signal subcarrier point according to the time offset estimation value
Offset compensation.
Alternatively, methods described also includes：
The window's position of the Fourier transformation is adjusted according to the time offset estimation value.
Alternatively, the time offset estimation, including：
By the channel estimation value conjugate multiplication of the reference signal subcarrier point of the adjacent position, as second
End value；
The time offset estimation value is obtained according to the phase information of second end value.
Alternatively, the time offset estimation, including：
Wherein described Δ τ be offset estimation value, DfFor described
At the interval of time domain, L is the number of the reference signal to reference signal, during N is the bandwidth for measuring
The number of Resource Block, k and l represent the symbol sequence number with the reference signal and OFDM sequence numbers respectively,
HpK, lFor the channel estimation value of the reference signal subcarrier point.
Alternatively, the value of the Df is 3 or 6.
Alternatively, methods described also includes：The time offset estimation value is filtered.
The embodiment of the present invention provides a kind of device of cell measurement, and described device includes：
Fourier transform unit, be suitable to the time domain baseband signals to receiving carry out Fourier transformation obtain frequency
Domain signal；
Channel estimating unit, is suitable to carry out channel estimation to the reference signal in the frequency-region signal obtain institute
State channel estimation value and the noise estimation value of frequency domain reference signal subcarrier point；
Frequency deviation estimating unit, is adapted in use to the reference signal subcarrier of the same position of different OFDM symbols
The channel estimation value of point carries out offset estimation, obtains offset estimation value；
Frequency offset compensation element, is suitable to according to the offset estimation value to the time domain baseband signals for receiving
Carry out frequency deviation compensation；
Computing unit, the channel of the reference signal subcarrier point after being suitable to ask for the frequency deviation compensation are estimated
The performance number of evaluation simultaneously takes the mean value of the performance number, and the mean value is deducted the noise estimates
The difference being worth to, used as the Reference Signal Received Power value of the cell to be measured.
Alternatively, the frequency deviation estimating unit, is suitable to the same position of the different OFDM symbols
The channel estimation value conjugate multiplication of reference signal subcarrier point, obtains the first end value；
The offset estimation value is obtained according to the phase information of first end value.
Alternatively, the frequency deviation estimating unit, is suitable to obtain the offset estimation value according to following formula：
Wherein Δ f is offset estimation value, and Dt is the reference
At the interval of frequency domain, L is the number of the reference signal to signal, and N is the resource in the bandwidth for measuring
The number of block, k and l represent the symbol sequence number with the reference signal and OFDM sequence numbers, Hp respectivelyK, l
For the channel estimation value of the reference signal subcarrier point.
Alternatively, described device also includes：
First filter unit, is suitable to be filtered the offset estimation value.
Alternatively, described device also includes：
Time offset estimation unit, is adapted in use to the reference signal subcarrier of adjacent position in same OFDM symbol
The channel estimation value of point carries out time offset estimation；
Partial compensation for the time unit, is suitable to according to the time offset estimation value to the frequency domain reference signal subcarrier point
Channel estimation value carry out partial compensation for the time.
Alternatively, described device also includes：
Adjustment unit, is suitable to adjust the window's position of the Fourier transformation according to the time offset estimation value.
Alternatively, the time offset estimation unit, is suitable to the reference signal subcarrier point of the adjacent position
Channel estimation value conjugate multiplication, as the second end value；
The time offset estimation value is obtained according to the phase information of second end value.
Alternatively, the time offset estimation unit, is suitable to obtain the time offset estimation value according to following formula：
Wherein described Δ τ be offset estimation value, DfFor described
At the interval of time domain, L is the number of the reference signal to reference signal, during N is the bandwidth for measuring
The number of Resource Block, k and l represent the symbol sequence number with the reference signal and OFDM sequence numbers respectively,
HpK, lFor the channel estimation value of the reference signal subcarrier point.
Alternatively, the value of the Df is 3 or 6.
Alternatively, described device also includes：Second filter unit, is suitable to carry out the time offset estimation value
Filtering.
A kind of user equipment, it is characterised in that including the cell measurement described in any of the above-described embodiment
Device.
Compared with prior art, technical scheme has advantages below：
Frequency deviation is carried out by using the channel estimation value of the reference signal of the same position of different OFDM symbols
Estimate, frequency deviation compensation carried out to the time domain baseband signals for receiving then according to the offset estimation value,
Due to providing frequency deviation information in itself using measurement apparatus, such that it is able to lift the performance of the anti-frequency deviation of measurement result,
And improve the robustness of measurement.
And when being carried out by using the channel estimation value of the reference signal of adjacent position in same OFDM symbol
Estimate partially, then according to Signal estimation of the time offset estimation value to the frequency domain reference signal subcarrier point
Value carries out partial compensation for the time, due to the breath that believes one side only when being provided using measurement apparatus itself, such that it is able to lift measurement
As a result inclined performance when anti-, such that it is able to further improve the robustness of measurement.
Further, as frequency deviation compensation can be carried out to signal before time domain Fourier transformation, such that it is able to
When cell switches, when be supplied to Serving cell with the information of frequency deviation partially, such that it is able to lift system
Performance.
Further, due in cell reselection, new Serving cell can obtain immediately signal it is new when it is inclined
With frequency deviation information, such that it is able to improve throughput performance now.
Description of the drawings
Fig. 1 is a kind of schematic flow sheet of the method for the cell measurement in the embodiment of the present invention；
Fig. 2 is a kind of schematic flow sheet of the device of the cell measurement in the embodiment of the present invention.
Specific embodiment
According to third generation partner program (3rd Generation Partnership Project, 3GPP)
The description of TS36.214 specifications understands, in LTE system, has three in measurement：1) reference signal connects
Power (Reference Signal Receiving Power, RSRP) is received, its definition is little in Measurement bandwidth
The linear averaging of area's specific reference signals (Cell-specific Reference Signal, CRS) power；2)
Carrier received signal intensity indicates (Received Signal Strength Indication, RSSI), its definition
It is the linear averaging of the symbol power with reference signal in Measurement bandwidth, including desired signal, cochannel
The power of interference, adjacent-channel interference and thermal noise；3) Reference Signal Received Quality (Reference Signal
Receiving Quality, RSRQ), its definition is that N × RSRP/RSSI, RSRP and RSSI are shown in above-mentioned
Definition, N is the number of Resource Block in Measurement bandwidth (Resource Block, RB).Wherein RSRP and
Two values of RSRQ will be reported, and RSRP indicates the absolute power of the reference signal for receiving, and RSRQ refers to
Show reference signal power and receive the relative ratio of general power.
From the definition of RSRP and RSSI, the measurement of user equipment (User Equipment, UE)
Mainly the symbol with CRS in descending sub frame is carried out.Specifically, the RSSI that survey calculation includes
Calculate, RSRP is calculated and RSRQ is calculated, respectively shown in formula (1)-(3)：
In formula (1), RK, lIt is the data of the symbol in frequency domain of the band CRS for receiving, L is band CRS
Symbol number, N is the number of the RB in the bandwidth for measuring, and k and l represents band CRS respectively
Symbol sequence number and subcarrier sequence number.
In formula (2), HK, lFor the channel impulse response of time domain, L is the number of the symbol with CRS,
NcrsIt is the number of CRS, k and l represents the symbol sequence number with CRS and subcarrier sequence number respectively.
In formula (3), N is the number of the RB in the bandwidth for measuring, and RSRP is connect for reference signal
Power is received, RSSI is indicated for carrier received signal intensity.
At present, the measuring method of cell provides frequency by other modules beyond measurement apparatus for measurement result
Believe one side only breath.But, this cell measuring method is likely to result in the ability of the anti-frequency deviation of measurement result, Shandong
Rod is weak.
For problem described above, method, device and the use of cell measurement is embodiments provided
Family equipment, is carried out by using the channel estimation value of the reference signal of the same position of different OFDM symbols
The time domain baseband signals for receiving are carried out frequency deviation then according to the offset estimation value by offset estimation
Compensation, and carried out by using the channel estimation value of the reference signal of adjacent position in same OFDM symbol
Time offset estimation, carries out partial compensation for the time then according to the time offset estimation value to the frequency domain reference signal.By
Inclined and frequency deviation information when being provided using measurement apparatus itself, such that it is able to lift the anti-frequency deviation of measurement result
Performance, and improve the robustness of measurement.
It is understandable for enabling the above objects, features and advantages of the present invention to become apparent from, below in conjunction with the accompanying drawings
The specific embodiment of the present invention is described in detail.
Fig. 1 shows a kind of schematic flow sheet of the method for the cell measurement in the embodiment of the present invention.Below
The step that implements of the measuring method is described in detail with reference to Fig. 1.
S11：Time domain baseband signals to receiving carry out Fourier transformation and obtain frequency-region signal.
In being embodied as, due to frequency domain signal be more convenient process and modulate, can to receive when
Domain baseband signal carries out Fourier transformation and obtains frequency-region signal.
S12：Channel estimation is carried out to the reference signal in the frequency-region signal and obtains the frequency domain reference signal
The channel estimation value of subcarrier point and noise estimation value.
In being embodied as, channel estimation can be carried out to the reference signal in the frequency-region signal and obtain institute
Channel estimation value and the noise estimation value of frequency domain reference signal subcarrier point is stated, such that it is able to know transmission letter
The configured transmission in road.
S13：Using the channel estimation of the reference signal subcarrier point of the same position of different OFDM symbols
Value carries out offset estimation, obtains offset estimation value.
In being embodied as, the characteristics of have close due to the subcarrier upper signal channel estimate of same position,
Can be carried out using the channel estimation value of the reference signal subcarrier point of the same position of different OFDM symbols
Offset estimation.
In an embodiment of the present invention, the offset estimation value can be obtained using formula (4)：
Wherein, f be offset estimation value, Dt be the reference signal at the interval of frequency domain, L is the reference
The number of signal, N is the number of the Resource Block in the bandwidth for measuring, and k and l is represented respectively with described
The symbol sequence number and OFDM sequence numbers of reference signal, HpK, lChannel for the reference signal subcarrier point is estimated
Evaluation.
Specified according to the agreement of LTE/LTEA, when the type of Cyclic Prefix is conventional cyclic prefix, frequency
Estimate partially to be estimated between symbol 4 and symbol 11, it is also possible in symbol in symbol 0 and symbol 7
Number 0 with symbol 4, estimated between symbol 7 and symbol 11, can also be symbol 0 and symbol 4,
Symbol 7 and symbol 11, are estimated between symbol 4 and symbol 7.When the type of Cyclic Prefix is extension
During Cyclic Prefix, offset estimation can be in symbol 0 and symbol 3, symbol 3 and symbol 6, symbol 6 and symbol
Estimated between numbers 9.
In being embodied as, in order that frequency deviation process is more smoothed, can also be to the offset estimation value
It is filtered.
S14：Frequency deviation compensation is carried out to the time domain baseband signals for receiving according to the offset estimation value.
In being embodied as, in order to lift the accuracy on the reference signal frequency, using different
The channel estimation value of the reference signal subcarrier point of the same position of OFDM symbol carry out offset estimation it
Afterwards, frequency deviation compensation is carried out to the time domain baseband signals for receiving always according to the offset estimation value.This
Sample can be so that the time domain baseband signals for receiving just enter line frequency before Fourier's change is carried out next time
Offset compensation, such that it is able to improve accuracy of the next time described time domain baseband signals for receiving on frequency domain.
In being embodied as, the characteristics of have close due to the subcarrier upper signal channel estimate of adjacent position,
Can also be entered using the channel estimation value of the reference signal subcarrier point of adjacent position in same OFDM symbol
Row time offset estimation.And in order to improve signal accuracy in time, after offset estimation, also
When can be carried out to the Signal estimation value of the frequency domain reference signal subcarrier point according to the time offset estimation value
Offset compensation.
Moreover, in an embodiment of the present invention, in order to adjust the window position of the change of Fourier next time
Put, to obtain more accurate signal interception position, can be with according to time offset estimation value adjustment
The window's position of Fourier transformation.
In an embodiment of the present invention, can first by the letter of the reference signal subcarrier point of the adjacent position
Road estimate conjugate multiplication, as the second end value, then according to the phase information of second end value
Obtain the time offset estimation value.
In an embodiment of the present invention, it is possible to use formula (5) obtains the time offset estimation value：
Wherein, parameter, Δ τ be offset estimation value, DfIt is the reference signal at the interval of time domain, L is institute
State the number of reference signal, N is the number of the Resource Block in the bandwidth for measuring, k and l is represented respectively
Symbol sequence number with the reference signal and OFDM sequence numbers, HpK, lFor the reference signal subcarrier point
Channel estimation value.
In an embodiment of the present invention, the DfValue be 3, in an alternative embodiment of the invention, institute
State DfValue be 6.
In being embodied as, in order that being carried to frequency domain reference signal according to the time offset estimation value
The Signal estimation value of wave point carries out the process of partial compensation for the time and more smooths, and the time offset estimation value can be entered
Row filtering.
S15：Ask for the power of the channel estimation value of the reference signal subcarrier point after the frequency deviation compensation
Value simultaneously takes the mean value of the performance number.
In being embodied as, due to the time domain baseband signals that receive next time carry out Fourier transformation it
Before, frequency deviation compensation has been carried out, that is to say, that frequency deviation compensation ensure that and described receive next time
To accuracy of the time domain baseband signals on frequency domain.Specify further according to above-mentioned agreement, can ask for described
The performance number of the Signal estimation value of the frequency domain reference signal subcarrier point after frequency deviation compensation simultaneously takes the performance number
Mean value, in other words, the signal of the frequency domain reference signal subcarrier point wherein after frequency deviation compensation is estimated
Evaluation is：The time domain baseband signals that have passed through after frequency deviation is compensated next time, then carry out Fourier's change
The Signal estimation value of the frequency domain reference signal subcarrier point got in return.As the estimate is by frequency
Baseband signal after offset compensation calculates what is got, therefore can improve the accuracy on the estimate frequency domain.
S16：The mean value is deducted into the difference that the noise estimation value is obtained, as described to be measured little
The Reference Signal Received Power value in area.
In being embodied as, according to the definition of the Reference Signal Received Power value, can be described average
Value deducts the difference that the noise estimation value is obtained, and receives work(as the reference signal of the cell to be measured
Rate value.
For causing those skilled in the art to more fully understand and realize the present invention, the following providing can be real
The device of the method for existing above-mentioned cell measurement.
Fig. 2 shows a kind of structural representation of the device of the cell measurement in one embodiment of the invention.Institute
Stating device can include：Fourier transform unit 1, channel estimating unit 2, frequency deviation estimating unit 7 and frequency
Offset compensation unit 10, computing unit 5, wherein：
The Fourier transform unit 1, is suitable to the time domain baseband signals to receiving and carries out Fourier transformation obtain
To frequency-region signal.
The channel estimating unit 2, is suitable to carry out channel estimation to the reference signal in the frequency-region signal obtain
To channel estimation value and the noise estimation value of the frequency domain reference signal subcarrier point.
The frequency deviation estimating unit 7, is adapted in use to the reference signal of the same position of different OFDM symbols
The channel estimation value of subcarrier point carries out offset estimation, obtains offset estimation value.
The frequency offset compensation element 10, is suitable to according to the offset estimation value to the time domain base for receiving
Band signal carries out frequency deviation compensation.
The computing unit 5, the letter of the reference signal subcarrier point after being suitable to ask for the frequency deviation compensation
The performance number of road estimate simultaneously takes the mean value of the performance number, and the mean value is deducted described making an uproar then
Sound estimates the difference being worth to, used as the Reference Signal Received Power value of the cell to be measured.
In being embodied as, described device can also include：Time offset estimation unit 3 and partial compensation for the time unit 4,
Wherein：
The time offset estimation unit 3, is adapted in use to the reference signal of adjacent position in same OFDM symbol
The channel estimation value of subcarrier point carries out time offset estimation.
The partial compensation for the time unit 4, is suitable to carry frequency domain reference signal according to the time offset estimation value
The channel estimation value of wave point carries out partial compensation for the time.
In being embodied as, described device can also include：Adjustment unit 6, the adjustment unit 6 are suitable to
The window's position of the Fourier transformation is adjusted according to the time offset estimation value.In an embodiment of the present invention,
The frequency deviation estimating unit 7, is suitable to reference signal of the same position of the different OFDM symbols
The channel estimation value conjugate multiplication of carrier wave point, obtains the first end value, then according to first end value
Phase information obtain the offset estimation value.
In being embodied as, the frequency deviation estimating unit 7 is suitable to be estimated according to following formula acquisition frequency deviation
Evaluation：
Wherein Δ f be offset estimation value, DtFor described with reference to letter
Number at the interval of frequency domain, L is the number of the reference signal, and N is the Resource Block in the bandwidth for measuring
Number, k and l represents the symbol sequence number with the reference signal and OFDM sequence numbers, Hp respectivelyK, lFor
The channel estimation value of the reference signal subcarrier point.
In being embodied as, the device of the cell measurement can also include：First filter unit 8.Institute
State the first filter unit 8 to be suitable to be filtered the frequency deviation offset.
In being embodied as, the time offset estimation unit 3 is suitable to reference signal of the adjacent position
The channel estimation value conjugate multiplication of carrier wave point, as the second end value, then according to second end value
Phase information obtain the time offset estimation value.
In an embodiment of the present invention, the time offset estimation unit 3, is suitable to according to following formula are obtained
Time offset estimation value：
Wherein described Δ τ be offset estimation value, DfFor described
At the interval of time domain, L is the number of the reference signal to reference signal, during N is the bandwidth for measuring
The number of Resource Block, k and l represent the symbol sequence number with the reference signal and OFDM sequence numbers respectively,
HpK, lFor the channel estimation value of the reference signal subcarrier point.
In being embodied as, the value of the Df can be 3, or 6.
In an embodiment of the present invention, described device can also include：Second filter unit 9.Described second
Filter unit 9 is suitable to be filtered the partial compensation for the time value.
The embodiment of the present invention additionally provides a kind of user equipment, and the user equipment can include implementing above
The device of the cell measurement described in example.
It should be noted that in the embodiment of the present invention, the user equipment includes but is not limited to mobile phone, pen
Note sheet, panel computer and vehicle-mounted computer etc. are suitable to computer equipment or portable equipment used in movement.
The user equipment can be communicated with base station, it is described communication include receive base station transmission signal and
To base station sending signal etc..
One of ordinary skill in the art will appreciate that all or part of step in the various methods of above-described embodiment
Suddenly can be by program to instruct the hardware of correlation to complete, the program can be stored in can with computer
Read in storage medium, storage medium can include：ROM, RAM, disk or CD etc..
Although present disclosure is as above, the present invention is not limited to this.Any those skilled in the art,
Without departing from the spirit and scope of the present invention, can make various changes or modifications, therefore the guarantor of the present invention
Shield scope should be defined by claim limited range.
Claims (21)
1. a kind of method of cell measurement, it is characterised in that include：
Time domain baseband signals to receiving carry out Fourier transformation and obtain frequency-region signal；
Channel estimation is carried out to the reference signal in the frequency-region signal obtains the frequency domain reference signal subcarrier
The channel estimation value of point and noise estimation value；
Carried out using the channel estimation value of the reference signal subcarrier point of the same position of different OFDM symbols
Offset estimation, obtains offset estimation value；
Frequency deviation compensation is carried out to the time domain baseband signals for receiving according to the offset estimation value；
Ask for the performance number of the channel estimation value of the reference signal subcarrier point after the frequency deviation compensation and take
The mean value of the performance number；
The mean value is deducted into the difference that the noise estimation value is obtained, as the ginseng of the cell to be measured
Examine signal reception power value.
2. the method for cell measurement according to claim 1, it is characterised in that the offset estimation, bag
Include：
By the channel estimation value of the reference signal subcarrier point of the same position of the different OFDM symbols altogether
Yoke is multiplied, and obtains the first end value；
The offset estimation value is obtained according to the phase information of first end value.
3. the method for cell measurement according to claim 2, it is characterised in that the offset estimation, bag
Include：
Wherein Δ f is offset estimation value, and Dt is for described with reference to letter
Number at the interval of frequency domain, L is the number of the reference signal, and N is the money in the bandwidth for measuring
The number of source block, k and l represent the symbol sequence number with the reference signal and OFDM sequence numbers respectively,
HpK, lFor the channel estimation value of the reference signal subcarrier point.
4. the method for cell measurement according to claim 1, it is characterised in that also include：To the frequency
Offset compensation value is filtered.
5. the method for cell measurement according to claim 1, it is characterised in that also include：
Carried out using the channel estimation value of the reference signal subcarrier point of adjacent position in same OFDM symbol
Time offset estimation；
It is inclined when being carried out to the channel estimation value of the frequency domain reference signal subcarrier point according to the time offset estimation value
Compensation.
6. the method for cell measurement according to claim 5, it is characterised in that also include：
The window's position of the Fourier transformation is adjusted according to the time offset estimation value.
7. the method for cell measurement according to claim 5, it is characterised in that described using same OFDM
On symbol, the channel estimation value of the reference signal subcarrier point of adjacent position carries out time offset estimation, including：
By the channel estimation value conjugate multiplication of the reference signal subcarrier point of the adjacent position, as the second knot
Fruit is worth；
The time offset estimation value is obtained according to the phase information of second end value.
8. the method for cell measurement according to claim 7, it is characterised in that described using same OFDM
On symbol, the channel estimation value of the reference signal subcarrier point of adjacent position carries out time offset estimation, including：
Wherein described Δ τ be offset estimation value, DfFor the ginseng
Signal is examined at the interval of time domain, L is the number of the reference signal, during N is the bandwidth for measuring
Resource Block number, k and l represents the symbol sequence number with the reference signal and OFDM sequences respectively
Number, HpK, lFor the channel estimation value of the reference signal subcarrier point.
9. the method for cell measurement according to claim 8, it is characterised in that the DfValue be 3
Or 6.
10. the method for cell measurement according to claim 5, it is characterised in that also include：To it is described when
Estimate partially is filtered.
11. a kind of devices of cell measurement, it is characterised in that include：
Fourier transform unit, is suitable to the time domain baseband signals to receiving and carries out Fourier transformation obtain frequency domain
Signal；
Channel estimating unit, is suitable to carry out the reference signal in the frequency-region signal channel estimation and obtains described
The channel estimation value of frequency domain reference signal subcarrier point and noise estimation value；
Frequency deviation estimating unit, is adapted in use to the reference signal subcarrier point of the same position of different OFDM symbols
Channel estimation value carry out offset estimation, obtain offset estimation value；
Frequency offset compensation element, is suitable to enter the time domain baseband signals for receiving according to the offset estimation value
Line frequency offset compensation；
Computing unit, the channel estimation of the reference signal subcarrier point after being suitable to ask for the frequency deviation compensation
The performance number of value simultaneously takes the mean value of the performance number, and the mean value is deducted the noise estimates
The difference being worth to, used as the Reference Signal Received Power value of the cell to be measured.
The device of 12. cell measurements according to claim 11, it is characterised in that the frequency deviation estimating unit,
It is suitable to the channel estimation of the reference signal subcarrier point of the same position of the different OFDM symbols
Value conjugate multiplication, obtains the first end value；
The offset estimation value is obtained according to the phase information of first end value.
The device of 13. cell measurements according to claim 12, it is characterised in that the frequency deviation estimating unit,
It is suitable to obtain the offset estimation value according to following formula：
Wherein Δ f is offset estimation value, and Dt is for described with reference to letter
Number at the interval of frequency domain, L is the number of the reference signal, and N is the money in the bandwidth for measuring
The number of source block, k and l represent the symbol sequence number with the reference signal and OFDM sequence numbers respectively,
HpK, lFor the channel estimation value of the reference signal subcarrier point.
The device of 14. cell measurements according to claim 11, it is characterised in that also include：
First filter unit, is suitable to be filtered the offset estimation value.
The device of 15. cell measurements according to claim 11, it is characterised in that also include：
Time offset estimation unit, is adapted in use to the reference signal subcarrier point of adjacent position in same OFDM symbol
Channel estimation value carry out time offset estimation；
Partial compensation for the time unit, is suitable to according to the time offset estimation value to the frequency domain reference signal subcarrier point
Channel estimation value carries out partial compensation for the time.
The device of 16. cell measurements according to claim 15, it is characterised in that also include：
Adjustment unit, is suitable to adjust the window's position of the Fourier transformation according to the time offset estimation value.
The device of 17. cell measurements according to claim 15, it is characterised in that the time offset estimation unit,
It is suitable to the channel estimation value conjugate multiplication of the reference signal subcarrier point of the adjacent position, as
Two end values；
The time offset estimation value is obtained according to the phase information of second end value.
The device of 18. cell measurements according to claim 17, it is characterised in that the time offset estimation unit,
It is suitable to obtain the time offset estimation value according to following formula：
Wherein described Δ τ be offset estimation value, DfFor the ginseng
Signal is examined at the interval of time domain, L is the number of the reference signal, during N is the bandwidth for measuring
Resource Block number, k and l represents the symbol sequence number with the reference signal and OFDM sequences respectively
Number, HpK, lFor the channel estimation value of the reference signal subcarrier point.
The device of 19. cell measurements according to claim 18, it is characterised in that the DfValue be 3
Or 6.
The device of 20. cell measurements according to claim 11, it is characterised in that also include：Second filtering
Unit, is suitable to be filtered the time offset estimation value.
21. a kind of user equipmenies, it is characterised in that include：Cell described in any one of claim 11-20 is surveyed
The device of amount.
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109150210A (en) * | 2017-06-15 | 2019-01-04 | 电信科学技术研究院 | A kind of signal processing method, device, electronic equipment and computer readable storage medium |
| CN109660478A (en) * | 2018-12-10 | 2019-04-19 | 长安大学 | A kind of timing frequency synchronous method based on improved Park frequency domain training sequence |
| CN111465051A (en) * | 2020-03-25 | 2020-07-28 | 紫光展锐(重庆)科技有限公司 | SINR estimation method, system, electronic device and storage medium |
| CN111713081A (en) * | 2018-01-12 | 2020-09-25 | 北欧半导体公司 | OFDM signal and noise estimation |
| CN112787962A (en) * | 2020-12-28 | 2021-05-11 | 上海复旦通讯股份有限公司 | Channel time domain feature extraction method and system based on pilot frequency reference signal |
| CN113271279A (en) * | 2021-05-14 | 2021-08-17 | 成都爱瑞无线科技有限公司 | High-precision detection method for random access channel of narrow-band Internet of things |
| CN114301751A (en) * | 2021-12-31 | 2022-04-08 | 诺领科技(南京)有限公司 | Frequency domain calculation method for reducing peak-to-average ratio of uplink signal of terminal of Internet of things |
| CN114520698A (en) * | 2022-02-15 | 2022-05-20 | 展讯通信（上海）有限公司 | RSRP compensation method and device and user equipment |
| CN117560100A (en) * | 2023-12-29 | 2024-02-13 | 深圳国人无线通信有限公司 | RSRP measurement method and device for SRS signals in base station |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080189360A1 (en) * | 2007-02-06 | 2008-08-07 | 5O9, Inc. A Delaware Corporation | Contextual data communication platform |
| CN101895309A (en) * | 2010-02-08 | 2010-11-24 | 北京韦加航通科技有限责任公司 | Signal to noise ratio estimation-based frequency offset regulation method |
| CN101989968A (en) * | 2009-07-31 | 2011-03-23 | 联芯科技有限公司 | Frequency offset estimation method and device |
| CN103475614A (en) * | 2012-06-07 | 2013-12-25 | 中国普天信息产业股份有限公司 | Method and device for frequency offset estimation and compensation |
-
2015
- 2015-09-14 CN CN201510582673.7A patent/CN106534019B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080189360A1 (en) * | 2007-02-06 | 2008-08-07 | 5O9, Inc. A Delaware Corporation | Contextual data communication platform |
| CN101989968A (en) * | 2009-07-31 | 2011-03-23 | 联芯科技有限公司 | Frequency offset estimation method and device |
| CN101895309A (en) * | 2010-02-08 | 2010-11-24 | 北京韦加航通科技有限责任公司 | Signal to noise ratio estimation-based frequency offset regulation method |
| CN103475614A (en) * | 2012-06-07 | 2013-12-25 | 中国普天信息产业股份有限公司 | Method and device for frequency offset estimation and compensation |
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109150210B (en) * | 2017-06-15 | 2020-05-05 | 电信科学技术研究院 | Signal processing method and device, electronic equipment and computer readable storage medium |
| CN109150210A (en) * | 2017-06-15 | 2019-01-04 | 电信科学技术研究院 | A kind of signal processing method, device, electronic equipment and computer readable storage medium |
| CN111713081B (en) * | 2018-01-12 | 2023-09-01 | 北欧半导体公司 | OFDM signal and noise estimation |
| CN111713081A (en) * | 2018-01-12 | 2020-09-25 | 北欧半导体公司 | OFDM signal and noise estimation |
| CN109660478B (en) * | 2018-12-10 | 2021-01-29 | 长安大学 | Timing frequency synchronization method based on improved Park frequency domain training sequence |
| CN109660478A (en) * | 2018-12-10 | 2019-04-19 | 长安大学 | A kind of timing frequency synchronous method based on improved Park frequency domain training sequence |
| CN111465051B (en) * | 2020-03-25 | 2022-05-24 | 紫光展锐(重庆)科技有限公司 | SINR estimation method, system, electronic device and storage medium |
| CN111465051A (en) * | 2020-03-25 | 2020-07-28 | 紫光展锐(重庆)科技有限公司 | SINR estimation method, system, electronic device and storage medium |
| CN112787962A (en) * | 2020-12-28 | 2021-05-11 | 上海复旦通讯股份有限公司 | Channel time domain feature extraction method and system based on pilot frequency reference signal |
| CN112787962B (en) * | 2020-12-28 | 2024-05-17 | 上海复旦通讯股份有限公司 | Channel time domain feature extraction method and system based on pilot frequency reference signal |
| CN113271279B (en) * | 2021-05-14 | 2022-07-05 | 成都爱瑞无线科技有限公司 | High-precision detection method for random access channel of narrow-band Internet of things |
| CN113271279A (en) * | 2021-05-14 | 2021-08-17 | 成都爱瑞无线科技有限公司 | High-precision detection method for random access channel of narrow-band Internet of things |
| CN114301751A (en) * | 2021-12-31 | 2022-04-08 | 诺领科技(南京)有限公司 | Frequency domain calculation method for reducing peak-to-average ratio of uplink signal of terminal of Internet of things |
| CN114520698A (en) * | 2022-02-15 | 2022-05-20 | 展讯通信（上海）有限公司 | RSRP compensation method and device and user equipment |
| CN117560100A (en) * | 2023-12-29 | 2024-02-13 | 深圳国人无线通信有限公司 | RSRP measurement method and device for SRS signals in base station |
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