CN103916951B - The timing fine synchronization method of cell initial search process - Google Patents

The timing fine synchronization method of cell initial search process Download PDF

Info

Publication number
CN103916951B
CN103916951B CN201210592125.9A CN201210592125A CN103916951B CN 103916951 B CN103916951 B CN 103916951B CN 201210592125 A CN201210592125 A CN 201210592125A CN 103916951 B CN103916951 B CN 103916951B
Authority
CN
China
Prior art keywords
data
cell
datai
impulse response
channel impulse
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN201210592125.9A
Other languages
Chinese (zh)
Other versions
CN103916951A (en
Inventor
杨恩浩
肖立波
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Spreadtrum Communications Shanghai Co Ltd
Original Assignee
Chongqing Cyit Communication Technologies Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Chongqing Cyit Communication Technologies Co Ltd filed Critical Chongqing Cyit Communication Technologies Co Ltd
Priority to CN201210592125.9A priority Critical patent/CN103916951B/en
Publication of CN103916951A publication Critical patent/CN103916951A/en
Application granted granted Critical
Publication of CN103916951B publication Critical patent/CN103916951B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Landscapes

  • Synchronisation In Digital Transmission Systems (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

The invention discloses a kind of cell initial search process timing fine synchronization method, including：Receive the descending synchronous code SYNC_DL multiple sampling data DATA with protection；Offset estimation is carried out to DATA any one circuit-switched data DATAi, obtains frequency shift (FS), correcting frequency deviation is carried out to DATAi；Serving cell is determined with the DATAi after correcting frequency deviation；Correcting frequency deviation is carried out to DATA with the frequency shift (FS)；Calculate channel impulse response power arrays of the DATA in serving cell；The following sync bit of chip-level is obtained in the channel impulse response power array peak of serving cell according to DATA.The timing fine synchronization method of the present invention carries out correcting frequency deviation to receiving data first before the following sync bit of chip-level is obtained, and has effectively eliminated the interference synchronous to timing essence of big frequency deviation, has improved the synchronous accuracy of timing essence.

Description

The timing fine synchronization method of cell initial search process
Technical field
The present invention relates to GSM simultaneous techniques, is related specifically to a kind of Time Division-Synchronous Code Division Multiple Access（Letter Claim, TD-SCDMA）The timing fine synchronization method of process is just searched in system cell.
Background technology
One of TD-SCDMA system is wireless, and frame length is 10ms, and it is made up of two completely identical in structure 5ms subframes. One subframe shares 10 time slot compositions：3 special time slots and 7 regular time slots for carrying out up-downgoing business, wherein often The length of individual conversational traffic time slot is 864 chips（Referred to as, Chip）.In 3 special time slots, descending pilot frequency time slot（Referred to as, DwPTS）Length is 96Chip, uplink pilot time slot（Referred to as, UpPTS）Length is 160chip, protection interval time slot（Referred to as, GP）Length is 96Chip.Descending pilot frequency time slot is used to send descending synchronous code（Referred to as, SYNC_DL）, realize down-going synchronous. In each subframe to provide the transmission of the antenna figuration of full MPS process, system is identified different small DwPTS using SYNC_DL Area.
The sampling rate of the single-time sampling of TD-SCDMA system is 1.28MHZ, needs to improve sampling rate in special scenes, Using multiple sampling, for single-time sampling, if sampled data is A, B, C ... ... then 4 sampling when sampled data be A1, A2, A3, A4, B1, B2, B 3, B4, C1, C2, C3, C4 ... ...；Ai, Bi, Ci ... ... are a circuit-switched data in multiple sampling.Wherein, i For road sequence number, interval is 1 to sampling multiple).
Cell initial search（Referred to as, ICS）Main process includes：
1st, timing coarse synchronization；2nd, timing essence is synchronous；3rd, cell ID is detected；4th, Frequency Synchronization；5th, broadcast message is read；6th, it is small It is resident in area.In TD-SCDMA system, the scheme of prior art is all accurate by timing coarse synchronization and the synchronous determination of timing essence Behind position, subsequent operation is carried out using DwPTS information.
Existing timing fine synchronization method includes during TD-SCDMA system ICS：
1st, using Sync_DL good autocorrelation performance and cross correlation, will be received using matched filter device Sync_DL and each cell local Sync_DL codes do slip related operation, determine the small of Chip levels sync bit and serving cell Area identifies（Referred to as, CELLID）；
2nd, Sync_DL or training sequence are utilized（Referred to as, Mdiamble）In the channel impulse response power of serving cell Peak information takes the operations such as interpolation to obtain the following sync bit of Chip levels.
Because Sync_DL related receptor frequency deviation has a great influence, when reception data have larger frequency deviation, data are received Auto-correlation and cross correlation can be by serious destructions；And the accuracy of the above-mentioned timing fine synchronization method of prior art is serious Correlation dependent on Sync_DL.Therefore in the case where frequency deviation is larger, the timing fine synchronization method of prior art is difficult to Accurate Timing Synchronization.
The content of the invention
In view of this, the present invention proposes a kind of cell initial search process timing fine synchronization method, to improve in big frequency deviation ring The synchronous accuracy of timing essence under border.
Technical solution of the present invention includes：
1st, the SYNC_DL multiple sampling data DATA with protection is received；
2nd, offset estimation is carried out to DATA any one circuit-switched data DATAi, obtains frequency shift (FS), frequency deviation is carried out to DATAi Correct；
3rd, serving cell is determined with the DATAi after correcting frequency deviation；
4th, correcting frequency deviation is carried out to DATA with the frequency shift (FS)；
5th, channel impulse response power arrays of the DATA in serving cell is calculated；
6th, below Chip levels are obtained synchronously in the channel impulse response power array peak of serving cell according to DATA Position；
Wherein, the DATA includes, the s data, SYNC_DL data before SYNC_DL data, SYNC_DL data it T data afterwards；The position of the SYNC_DL data is that timing coarse synchronization determines SYNC_DL positions；The i is more times and adopted The road sequence number of sample data, i span is 1~I, and I is sampling multiple.
Preferably, any one circuit-switched data DATAi progress offset estimation to DATA further comprises：
Preset N number of initial frequency deviation △ fn；
With each △ fnDefault correcting frequency deviation is carried out to DATAi；Obtain the sequence D ATAi after N number of default correcting frequency deviationn；
Each DATAi is calculated respectivelynIn the channel impulse response power array of each cell；Obtain each DATAinIn each cell Signal quality Scale (n, m)；
By the best DATAi of Scale (n, m)nAs the DATAi after correcting frequency deviation；By the DATAinCorresponding △ fnMake For frequency shift (FS)；
Wherein, the Scale (n, m) is DATAinSignal quality on cell m.
Preferably, each △ fnDefault correcting frequency deviation is carried out to DATAi to further comprise：
FFT is carried out to DATAi（Referred to as, FFT）, obtain DATAi frequency domain sequence DATA_FFTi；
With each △ fnDefault correcting frequency deviation is carried out to DATA_FFTi；Obtain the DATAi after each default correcting frequency deviationnFrequency domain Sequence.
Preferably, it is described to calculate each DATAi respectivelynInclude in the channel impulse response power array of each cell：
Respectively with each DATA inFrequency domain sequence and each cell local SYNC_DL frequency domain sequence carry out conjugation and multiply；
Result is multiplied to each conjugation and carries out fast fourier inverse transformation（Referred to as, IFFT）, obtain each time domain for being conjugated and multiplying result Sequence；
The time domain sequences for multiplying result using each conjugation calculate each DATAinIn the channel impulse response power array of each cell.
Further, the DATAi using after correcting frequency deviation determines that serving cell includes：
Using cell best Scale (n, m) as serving cell.
Further, methods described is carrying out also including after correcting frequency deviation to DATA：
Selection J cell best Scale (n, m) in addition to serving cell is as interfered cell；
Eliminate the signal of each interfered cell in DATA；
Wherein, the J is default interfered cell quantity.
Further, the signal of each interfered cell includes in the elimination DATA：
It is respectively that the DATA after correcting frequency deviation is related to the local SYNC_DL of each interfered cell, obtain each interfered cell letter Channel shock response array；
Each interfered cell channel impulse response power array is calculated according to each interfered cell channel impulse response array；
The component of signal of each interfered cell is obtained according to each interfered cell channel impulse response power array.
The component of signal of each interfered cell is eliminated from the DATA after correcting frequency deviation.
Further, the signal point that each interfered cell is obtained according to each interfered cell channel impulse response power array Amount includes：
To each interfered cell, the maximum Pmax in the interfered cell channel impulse response power array is found out；
Using position corresponding to small Yu Pmax/TH1 element in the interfered cell channel impulse response power array as making an uproar Sound path position；
Remove each noise path in the interfered cell channel impulse response array；
With interfered cell channel impulse response array and the local SYNC_DL of the interfered cell after each noise path of removing Sequence carries out the component of signal that channel impulse response inverse operation obtains the interfered cell；
Wherein, the TH1 is default noise gate.
Further, the signal point that each interfered cell is obtained according to each interfered cell channel impulse response power array Amount includes：
To each interfered cell, the maximum Pmax in the interfered cell channel impulse response power array is found out；
Make each TH2 position in Pmax positions and Pmax positions or so as signal path position, remaining position For noise path position；
Remove each noise path in the interfered cell channel impulse response array；
With interfered cell channel impulse response array and the local SYNC_DL of the interfered cell after each noise path of removing Sequence carries out the component of signal that channel impulse response inverse operation obtains the interfered cell；
Wherein, the TH2 is that default noise path selects thresholding.
Preferably, the signal quality Scale (n, m) is：
Wherein, Pmax (n, m) is DATAinMaximum in cell m channel impulse response power array； Paverage (n, m) is DATAinOther elements in cell m channel impulse response power array in addition to maximum Average value.
Preferably, the signal quality Scale (n, m) is：
Scale(n,m)=Pmax(n,m)
Wherein, Pmax (n, m) is DATAinMaximum in cell m channel impulse response power array.
Preferably, the signal quality Scale (n, m) is：
Wherein, Pmax (n, m) is DATAinMaximum in cell m channel impulse response power array；Pnoise (n, m) is DATAinAll elements less than Pmax (n, m)/TH is averaged in cell m channel impulse response power array Value；The TH is default threshold value.
Technical scheme receives data progress frequency deviation to multiple sampling and entangled first in the smart synchronizing process of timing Just, the influence synchronous to timing essence of big frequency deviation is eliminated, effectively raises the synchronous accuracy of timing essence.
Brief description of the drawings
Fig. 1 is cell initial search process flow diagram flow chart；
Fig. 2 is the overview flow chart of the specific embodiment of the invention 1；
Fig. 3 is the offset estimation preferred implementation protocol procedures figure of the specific embodiment of the invention 2;
Fig. 4 is that the interfered cell signal of the specific embodiment of the invention 3 eliminates preferred implementation protocol procedures figure;
Embodiment
To further illustrate technical scheme, it is described with reference to the accompanying drawings below by specific embodiment.
Specific embodiment 1
This specific embodiment be timing fine synchronization method of the present invention a kind of preferred embodiment, overall procedure such as Fig. 2 institutes Show, including：
1st, the DwPTS positions according to determined by being estimated timing coarse synchronization, the SYNC_DL multiple sampling data with protection are received DATA；
Wherein, the DATA includes, the s data, SYNC_DL data before SYNC_DL data, SYNC_DL data it T data afterwards；S is default SYNC_DL head protections data bulk, and s span is that 1~32, t is default SYNC_ DL tails protect data bulk, and t span is 1~32；
2nd, offset estimation is carried out to DATA any one circuit-switched data DATAi, obtains frequency shift (FS), frequency deviation is carried out to DATAi Correct；
Wherein, i be the circuit-switched datas of DATA i-th sequence number, i=1,2,3. ..., I；I is sampling multiple；
3rd, serving cell is determined with the DATAi after correcting frequency deviation；
It is related to the local SYNC_DL sequences of each cell respectively with the DATA i after correcting frequency deviation, DATAi is calculated each small The channel impulse response power array in area, obtain signal qualitys of the DATAi in each cell；
The top-quality cell of selection signal is as serving cell；
4th, correcting frequency deviation is carried out to DATA according to the frequency shift (FS)；
5th, channel impulse response power arrays of the DATA in serving cell is calculated；
It is related to the local SYNC_DL sequences of serving cell with the DAT after correcting frequency deviation, DATA is calculated in serving cell Channel impulse response power array；
6th, the following sync bit of Chip levels is obtained in the channel impulse response power peak position of serving cell according to DATA；
Maximums of the DATA in the channel impulse response power array of serving cell is found out, the position of the maximum is The following sync bit of Chip levels.
Specific embodiment 2
The present embodiment includes each step of specific embodiment 1, and step 2 flow includes as shown in Figure 3：
In the present embodiment, step 2 can perform in time domain, can also be performed in frequency domain；
21st, N number of initial frequency deviation △ f are presetn；
Wherein, n=1~N；The N rule of thumb data or experimental data can be set, and preferably 3~10；
22nd, with each △ fnDefault correcting frequency deviation is carried out to DATAi；Obtain the sequence D ATAi after N number of default correcting frequency deviationn；
When time domain performs：
Wherein, DATAin(k) DATAi is representednK-th of data of sequence,
When frequency domain performs：
FFT is carried out to DATAi, obtains DATAi frequency domain sequence DATA_FFTi；
With each △ fnDefault correcting frequency deviation is carried out to DATA_FFTi；Obtain the DATAi after each default correcting frequency deviationnFrequency domain Sequence；
The default correcting frequency deviation of frequency domain can be carried out by carrying out shifting function to DATA_FFTi sequences, wherein, often move One frequency deviation corrected is determined by sampling multiple and FFT points；With 4 samplings, exemplified by 128 point FFT, by DATA_FFTi sequences Row often move to left one, and the frequency deviation of correction is 10KHz；DATA_FFTi sequences are often moved to right one, the frequency deviation of correction is -10KHz；
23rd, each DATAi is calculated respectivelynIn the channel impulse response power array of each cell；Obtain each DATAinIn each cell Signal quality Scale (n, m)；
When time domain performs：
By each DATAinIt is related to each cell local SYNC_DL respectively, calculate each DATAinRung in the channel impulse of each cell Answer power array P (n, m)；
P (n, m) represents DATAinChannel impulse response power array on cell m, m represent cell sequence number；
Each Scale (n, m) is obtained according to each P (n, m)；
Scale (n, m) represents DATAinSignal quality on cell m；
When frequency domain performs：
By each DATAinFrequency domain sequence carry out conjugation with each cell local SYNC_DL frequency domain sequence respectively and multiply；
Result is multiplied to each conjugation and carries out fast fourier inverse transformation, obtains each time domain sequences for being conjugated and multiplying result；
The time domain sequences for multiplying result with each conjugation calculate each DATAinIn the channel impulse response power array P of each cell (n,m)；
Each Scale (n, m) is obtained according to each P (n, m)；
Wherein, P (n, m) represents DATAinChannel impulse response power array on cell m；Scale (n, m) is represented DATAinSignal quality on cell m；M represents cell sequence number；
24th, by DATAi best Scale (n, m)nAs the DATAi after correcting frequency deviation；By the DATAinCorresponding △ fnAs frequency shift (FS)；
In the present embodiment, the signal quality Scale (n, m) can be preferably：
Scale(n,m)=Pmax(n,m)
Wherein, Pmax (n, m) is the maximum in P (n, m)；
In the present embodiment, the signal quality Scale (n, m) can also be preferably：
Wherein, Pnoise (n, m) is the average value of all elements less than Pmax (n, m)/TH in P (n, m)；The TH is Default threshold value, TH preferred value is 2~5；
In the present embodiment, the signal quality Scale (n, m) can also be preferably：
Wherein, Paverage (n, m) is the average value of other elements of the P (n, m) in addition to maximum.
It should be noted that above-mentioned several Scale (n, m) are only the preferred signals quality index of the present embodiment；This area Those skilled in the art it is to be clearly understood that in the present invention, signal quality can use any one to state signal matter The index of amount, the present embodiment using which kind of quality indication signal for not limited.
In the present embodiment, by the preferred implementation flow of above-mentioned steps 2, the DATAi after correcting frequency deviation has been obtained each The signal quality of cell；Therefore the best cells of Scale (n, m) can be directly selected as serving cell in step 3.
Method of the frequency offset estimation procedure of the present embodiment by presetting correcting frequency deviation, can be in less implementation complexity base It is preliminary on plinth to obtain the substantially frequency deviation for receiving data, while offset estimation, correcting frequency deviation also is carried out to DATAi, has been used for Correcting frequency deviation is carried out to receiving data, in the present embodiment, step 2 is preferably implemented in frequency domain, can enter one in the smart synchronization of timing Step reduces computation complexity.
Specific embodiment 3
The present embodiment includes each step of specific embodiment 2, after the step 4 of specific embodiment 2, in addition to step a；Step a as shown in figure 4, including：
A1, selection J cell best Scale (n, m) in addition to serving cell are as interfered cell；
The J is default interfered cell quantity, and its preferred span is 1~6；
It is a2, the DATA after correcting frequency deviation is related to the local SYNC_DL of each interfered cell respectively, obtain each interfered cell Channel impulse response array；
A 3, each interfered cell channel impulse response power array calculated according to each interfered cell channel impulse response array；
A4, the component of signal according to each interfered cell of each interfered cell channel impulse response power array acquisition.
A5, the component of signal for eliminating from DATA each interfered cell；
As a kind of preferred implementation scheme of the present embodiment, the step a4 includes：
To each interfered cell：
A401, find out maximum Pmax in the interfered cell channel impulse response power array；
A402, position corresponding to small Yu Pmax/TH1 element in the interfered cell channel impulse response power array made For noise path position；
A403, remove each noise path in the interfered cell channel impulse response array；
It is described to be cleared in this step, the channel impulse response of the noise path is arranged to 0；
A404, with removing the interfered cell channel impulse response array after each noise path and the local of the interfered cell SYNC_DL sequences carry out the component of signal that channel impulse response inverse operation obtains the interfered cell；
Wherein, the TH1 is default noise gate, and TH1 preferred span is 2~5.
As another preferred implementation scheme of the present embodiment, the step a4 includes：
To each interfered cell,
A411, find out maximum Pmax in the channel impulse response power array of the interfered cell；
A412, using each TH2 position in Pmax positions and Pmax positions or so as signal path position, remaining position Put as noise path position；
A413, remove each noise path in the interfered cell channel impulse response array；
It is described to be cleared in this step, the channel impulse response of the noise path is arranged to 0；
A414, with removing the interfered cell channel impulse response array after each noise path and the local of the interfered cell SYNC_DL sequences carry out the component of signal that channel impulse response inverse operation obtains the interfered cell；
Wherein, the TH2 is that default noise path selects thresholding, and TH2 span is 1~7.
The method of the present embodiment eliminates interfered cell letter on the basis of frequency offset interference is eliminated to the smart synchronous impact of timing Number influence synchronous to timing essence, further increases the synchronous accuracy of timing essence.
Those of ordinary skill in the art obviously should understand and understand that the above example that the present invention is lifted is only used for Illustrate the present invention, and be not intended to limit the invention.In the case of without departing substantially from the spiritual and its essence of the present invention, this area skill Art personnel work as can make various corresponding changes or deformation according to the present invention, but these corresponding changes or deformation belong to this hair Bright claims.

Claims (12)

  1. A kind of 1. cell initial search process timing fine synchronization method, it is characterised in that including：
    Receive the descending synchronous code SYNC_DL multiple sampling data DATA with protection；
    Offset estimation is carried out to DATA any one circuit-switched data DATAi, obtains frequency shift (FS), correcting frequency deviation is carried out to DATAi；
    Serving cell is determined with the DATAi after correcting frequency deviation；
    Correcting frequency deviation is carried out to DATA with the frequency shift (FS)；
    It is related to the local SYNC_DL sequences of serving cell with the DATA after correcting frequency deviation, calculate letters of the DATA in serving cell Channel shock response power array；
    The following sync bit of chip-level is obtained in the channel impulse response power array peak of serving cell according to DATA；
    Wherein, the DATA includes, the t after s data, SYNC_DL data before SYNC_DL data, SYNC_DL data Individual data；The position of the SYNC_DL data is determined by timing coarse synchronization；The i be multiple sampling data road sequence number, i=1 ~I, I are sampling multiple；The s is default SYNC_DL head protections data bulk, and the t protects for default SYNC_DL tails Data bulk.
  2. 2. according to the method for claim 1, it is characterised in that any one circuit-switched data DATAi to DATA enters line frequency Estimation further comprises partially：
    Preset N number of initial frequency deviation △ fn；
    With each △ fnDefault correcting frequency deviation is carried out to DATAi；Obtain the sequence D ATAi after N number of default correcting frequency deviationn；
    Each DATAi is calculated respectivelynIn the channel impulse response power array of each cell；Obtain each DATAinIn the signal of each cell Quality Scale (n, m)；
    By the best DATAi of Scale (n, m)nAs the DATAi after correcting frequency deviation；By the DATAinCorresponding △ fnAs frequency Rate is offset；
    Wherein, the Scale (n, m) is DATAinSignal quality on cell m；N is the sequence number of default frequency deviation, n=1~N；N For default initial frequency deviation quantity；M is cell sequence number.
  3. 3. according to the method for claim 2, it is characterised in that each △ fnDefault correcting frequency deviation is carried out to DATAi to enter One step includes：
    FFT is carried out to DATAi, obtains DATAi frequency domain sequence DATA_FFTi；
    With each △ fnDefault correcting frequency deviation is carried out to DATA_FFTi；Obtain the DATAi after each default correcting frequency deviationnFrequency domain sequence Row.
  4. 4. according to the method for claim 3, it is characterised in that described to calculate each DATAi respectivelynRushed in the channel of each cell Swashing responding power array includes：
    Respectively with each DATAinFrequency domain sequence and each cell local SYNC_DL frequency domain sequence carry out conjugation and multiply；
    Result is multiplied to each conjugation and carries out fast fourier inverse transformation, obtains each time domain sequences for being conjugated and multiplying result；
    The time domain sequences for multiplying result using each conjugation calculate each DATAinIn the channel impulse response power array of each cell.
  5. 5. according to the method for claim 2, it is characterised in that the DATAi using after correcting frequency deviation determines that service is small Area includes：
    Using cell best Scale (n, m) as serving cell.
  6. 6. according to the method for claim 2, it is characterised in that methods described is carrying out also wrapping after correcting frequency deviation to DATA Include：
    Selection J cell best Scale (n, m) in addition to serving cell is as interfered cell；
    Eliminate the signal of each interfered cell in DATA；
    Wherein, the J is default interfered cell quantity.
  7. 7. according to the method for claim 6, it is characterised in that the signal of each interfered cell includes in the elimination DATA：
    It is respectively that the DATA after correcting frequency deviation is related to the local SYNC_DL of each interfered cell, obtain each interfered cell channel punching Swash response array；
    Each interfered cell channel impulse response power array is calculated according to each interfered cell channel impulse response array；
    The component of signal of each interfered cell is obtained according to each interfered cell channel impulse response power array；
    The component of signal of each interfered cell is eliminated from the DATA after correcting frequency deviation.
  8. 8. according to the method for claim 7, it is characterised in that described according to each interfered cell channel impulse response power number The component of signal that group obtains each interfered cell includes：
    To each interfered cell, the maximum Pmax in the interfered cell channel impulse response power array is found out；
    Using position corresponding to small Yu Pmax/TH1 element in the interfered cell channel impulse response power array as noise path Position；
    Remove each noise path in the interfered cell channel impulse response array；
    With interfered cell channel impulse response array and the local SYNC_DL sequences of the interfered cell after each noise path of removing Carry out the component of signal that channel impulse response inverse operation obtains the interfered cell；
    Wherein, the TH1 is default noise gate.
  9. 9. according to the method for claim 7, it is characterised in that described according to each interfered cell channel impulse response power number The component of signal that group obtains each interfered cell includes：
    To each interfered cell, the maximum Pmax in the interfered cell channel impulse response power array is found out；
    It is used as each TH2 position in Pmax positions and Pmax positions or so as signal path position, remaining position and makes an uproar Sound path position；
    Remove each noise path in the interfered cell channel impulse response array；
    With interfered cell channel impulse response array and the local SYNC_DL sequences of the interfered cell after each noise path of removing Carry out the component of signal that channel impulse response inverse operation obtains the interfered cell；
    Wherein, the TH2 is that default noise path selects thresholding.
  10. 10. the method according to any one of claim 2~9, it is characterised in that the signal quality Scale (n, m) For：
    <mrow> <mi>S</mi> <mi>c</mi> <mi>a</mi> <mi>l</mi> <mi>e</mi> <mrow> <mo>(</mo> <mi>n</mi> <mo>,</mo> <mi>m</mi> <mo>)</mo> </mrow> <mo>=</mo> <mfrac> <mrow> <mi>P</mi> <mi>m</mi> <mi>a</mi> <mi>x</mi> <mrow> <mo>(</mo> <mi>n</mi> <mo>,</mo> <mi>m</mi> <mo>)</mo> </mrow> </mrow> <mrow> <mi>P</mi> <mi>a</mi> <mi>v</mi> <mi>e</mi> <mi>r</mi> <mi>a</mi> <mi>g</mi> <mi>e</mi> <mrow> <mo>(</mo> <mi>n</mi> <mo>,</mo> <mi>m</mi> <mo>)</mo> </mrow> </mrow> </mfrac> </mrow>
    Wherein, Pmax (n, m) is DATAinMaximum in cell m channel impulse response power array；Paverage(n, M) it is DATAinThe average value of other elements in cell m channel impulse response power array in addition to maximum.
  11. 11. the method according to any one of claim 2~9, it is characterised in that the signal quality Scale (n, m) For：
    Scale (n, m)=Pmax (n, m)
    Wherein, Pmax (n, m) is DATAinMaximum in cell m channel impulse response power array.
  12. 12. the method according to any one of claim 2~9, it is characterised in that the signal quality Scale (n, m) For：
    <mrow> <mi>S</mi> <mi>c</mi> <mi>a</mi> <mi>l</mi> <mi>e</mi> <mrow> <mo>(</mo> <mi>n</mi> <mo>,</mo> <mi>m</mi> <mo>)</mo> </mrow> <mo>=</mo> <mfrac> <mrow> <mi>P</mi> <mi>m</mi> <mi>a</mi> <mi>x</mi> <mrow> <mo>(</mo> <mi>n</mi> <mo>,</mo> <mi>m</mi> <mo>)</mo> </mrow> </mrow> <mrow> <mi>P</mi> <mi>n</mi> <mi>o</mi> <mi>i</mi> <mi>s</mi> <mi>e</mi> <mrow> <mo>(</mo> <mi>n</mi> <mo>,</mo> <mi>m</mi> <mo>)</mo> </mrow> </mrow> </mfrac> </mrow>
    Wherein, Pmax (n, m) is DATAinMaximum in cell m channel impulse response power array；Pnoise(n,m) For DATAinThe average value of all elements less than Pmax (n, m)/TH in cell m channel impulse response power array；Institute It is default noise threshold to state TH.
CN201210592125.9A 2012-12-29 2012-12-29 The timing fine synchronization method of cell initial search process Active CN103916951B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201210592125.9A CN103916951B (en) 2012-12-29 2012-12-29 The timing fine synchronization method of cell initial search process

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201210592125.9A CN103916951B (en) 2012-12-29 2012-12-29 The timing fine synchronization method of cell initial search process

Publications (2)

Publication Number Publication Date
CN103916951A CN103916951A (en) 2014-07-09
CN103916951B true CN103916951B (en) 2018-01-05

Family

ID=51042255

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201210592125.9A Active CN103916951B (en) 2012-12-29 2012-12-29 The timing fine synchronization method of cell initial search process

Country Status (1)

Country Link
CN (1) CN103916951B (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1578485A (en) * 2003-07-28 2005-02-09 凯明信息科技股份有限公司 Automatic correcting frequency method for time-division radio communication system and apparatus thereof
EP1720311A1 (en) * 1997-11-05 2006-11-08 Sony Deutschland Gmbh Synchronisation of digital communication systems
CN102123414A (en) * 2011-04-19 2011-07-13 重庆邮电大学 Self-adaptive auxiliary synchronization signal detection method for TD-LTE (time division-long term evolution) system
CN102694763A (en) * 2012-05-31 2012-09-26 重庆邮电大学 Method for assessing integer frequency offset of TD-LTE system

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1720311A1 (en) * 1997-11-05 2006-11-08 Sony Deutschland Gmbh Synchronisation of digital communication systems
CN1578485A (en) * 2003-07-28 2005-02-09 凯明信息科技股份有限公司 Automatic correcting frequency method for time-division radio communication system and apparatus thereof
CN102123414A (en) * 2011-04-19 2011-07-13 重庆邮电大学 Self-adaptive auxiliary synchronization signal detection method for TD-LTE (time division-long term evolution) system
CN102694763A (en) * 2012-05-31 2012-09-26 重庆邮电大学 Method for assessing integer frequency offset of TD-LTE system

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
OFDM系统符号定时精同步研究;孙海信等;《声学技术》;20070831;第26卷(第4期);全文 *

Also Published As

Publication number Publication date
CN103916951A (en) 2014-07-09

Similar Documents

Publication Publication Date Title
CN101656700B (en) Method and device for detecting cyclic prefix type during initial cell search in long-term evolution system
CN101295999A (en) Detection method for accidental precursor access
CN100566192C (en) The method and apparatus of measurement of communication quality in the code division multiple access system
CN1988525B (en) Synchronizing method for orthogonal frequency division multiplex system
CN110224968A (en) Frame timing synchronized method and device in a kind of ofdm communication system
CN100372244C (en) Method for identifying the beginning of a uwb pulse sequence
CN101489238B (en) Time difference measuring method, system and apparatus
CN103023853A (en) Orthogonal frequency division multiplexing received frame synchronizing method for co-training sequence mutual-correlation information
CN110224964A (en) Symbol timing synchronization method, device, receiver device and storage medium
CN100508428C (en) A method and apparatus for increasing synchronous detection precision
CN103188195B (en) Method and device of coarse synchronizing
CN101420248B (en) Method and device for frequency bias estimation of TD-SCDMA terminal
CN105791201A (en) Blind synchronization method of uplink signal in LET/LTE-A system
CN102082757B (en) Method for improving timing synchronization of OFDM (orthogonal frequency division multiplexing) system under multipath channel
CN101047422B (en) Method for implementing synchronous under code stage of time-division-synchronous CDMA system
CN100559785C (en) A kind of receiving symbolic synchronous method that is used for the WiMAX system
CN103916951B (en) The timing fine synchronization method of cell initial search process
CN103873421A (en) Symbol synchronizing method of multi-path channel
CN100512036C (en) Method and device for estimating channel in TD-SCDMA
CN101217525B (en) A downlink frame synchronization method and device in orthogonal frequency division multiplexing system
CN102083176B (en) Time synchronization method and device in cell search process
CN1595834B (en) Method and apparatus for initial synchronization in CDMA mobile communication system
CN106973402B (en) A kind of detection method for LTE super large cell random access time delay
CN105577596B (en) Signal creating method, frequency deviation detection method and device
CN101895312A (en) Pseudo random code sequence phase capturing method and capturing device

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant
TR01 Transfer of patent right
TR01 Transfer of patent right

Effective date of registration: 20180105

Address after: Nanping Street 400060 Chongqing Nan'an District Nancheng Road No. 199 left attached to the floor 403

Patentee after: Keen (Chongqing) Microelectronics Technology Co.,Ltd.

Address before: 400065 Chongqing Nan'an District huangjuezhen pass Fort Park No. 1

Patentee before: CHONGQING CYIT COMMUNICATION TECHNOLOGIES Co.,Ltd.

CP02 Change in the address of a patent holder
CP02 Change in the address of a patent holder

Address after: 400060 Yuen No. 8, South Bank district, Chongqing City, B

Patentee after: Keen (Chongqing) Microelectronics Technology Co.,Ltd.

Address before: Nanping Street 400060 Chongqing Nan'an District Nancheng Road No. 199 left attached to the floor 403

Patentee before: Keen (Chongqing) Microelectronics Technology Co.,Ltd.

TR01 Transfer of patent right
TR01 Transfer of patent right

Effective date of registration: 20181108

Address after: 201203 Building 1, exhibition hall, 2288 lane, 2288 Chong, road, Zhangjiang hi tech park, Shanghai

Patentee after: SPREADTRUM COMMUNICATIONS (SHANGHAI) Co.,Ltd.

Address before: 400060 B Road, 8 Yuen Road, Nan'an District, Chongqing

Patentee before: Keen (Chongqing) Microelectronics Technology Co.,Ltd.

TR01 Transfer of patent right
TR01 Transfer of patent right

Effective date of registration: 20200603

Address after: 8-07, building 6, ronghuiyuan, airport economic core area, Shunyi District, Beijing

Patentee after: Xin Xin finance leasing (Beijing) Co.,Ltd.

Address before: 201203 Shanghai city Zuchongzhi road Pudong New Area Zhangjiang hi tech park, Spreadtrum Center Building 1, Lane 2288

Patentee before: SPREADTRUM COMMUNICATIONS (SHANGHAI) Co.,Ltd.

TR01 Transfer of patent right
TR01 Transfer of patent right

Effective date of registration: 20201201

Address after: Room 2502, COFCO Plaza, 990 Nanma Road, Nankai District, Tianjin

Patentee after: Xin Xin finance leasing (Tianjin) Co.,Ltd.

Address before: 8-07, building 6, ronghuiyuan, airport economic core area, Shunyi District, Beijing

Patentee before: Xin Xin finance leasing (Beijing) Co.,Ltd.

EE01 Entry into force of recordation of patent licensing contract
EE01 Entry into force of recordation of patent licensing contract

Application publication date: 20140709

Assignee: SPREADTRUM COMMUNICATIONS (SHANGHAI) Co.,Ltd.

Assignor: Xin Xin finance leasing (Tianjin) Co.,Ltd.

Contract record no.: X2021110000055

Denomination of invention: Timing fine synchronization method for cell initial search process

Granted publication date: 20180105

License type: Exclusive License

Record date: 20211227

TR01 Transfer of patent right
TR01 Transfer of patent right

Effective date of registration: 20230706

Address after: 201203 Shanghai city Zuchongzhi road Pudong New Area Zhangjiang hi tech park, Spreadtrum Center Building 1, Lane 2288

Patentee after: SPREADTRUM COMMUNICATIONS (SHANGHAI) Co.,Ltd.

Address before: Room 2502, COFCO Plaza, 990 Nanma Road, Nankai District, Tianjin 300100

Patentee before: Xin Xin finance leasing (Tianjin) Co.,Ltd.