CN101631098A - Method and device for acquiring synchronizing signal and determining starting point - Google Patents
Method and device for acquiring synchronizing signal and determining starting point Download PDFInfo
- Publication number
- CN101631098A CN101631098A CN 200810116649 CN200810116649A CN101631098A CN 101631098 A CN101631098 A CN 101631098A CN 200810116649 CN200810116649 CN 200810116649 CN 200810116649 A CN200810116649 A CN 200810116649A CN 101631098 A CN101631098 A CN 101631098A
- Authority
- CN
- China
- Prior art keywords
- frame
- starting point
- psch
- signal
- operating range
- 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.)
- Granted
Links
Images
Landscapes
- Mobile Radio Communication Systems (AREA)
Abstract
The invention relates to the field of mobile communication, in particular to the technology that a mobile terminal determines a starting point of a synchronizing signal and receives the acquired synchronizing signal. A method for determining the starting point of the synchronizing signal comprises the following steps of: determining an operation scope of a data frame received currently according to a starting point of a primary synchronous channel PSCH signal of a data frame received before; carrying out related operation in the determined operation scope to acquire a related sequence; and determining the starting point of the PSCH signal of the data frame received currently according to the maximal related value point in the related sequence. The invention also provides a device for determining the starting point of the synchronizing signal, a method and a device for acquiring the synchronizing signal. Because the starting point of the PSCH signal of the data frame received before is taken as a datum point of a data frame received later, the method and the device can more accurately determine the starting point of the PSCH signal of the data frame received later after determining a related operation scope of the data frame received later and carrying out the related operation again.
Description
Technical field
The present invention relates to moving communicating field, relate in particular to portable terminal and determine the synchronizing signal starting point and receive the technology that obtains synchronizing signal.
Background technology
When portable terminal inserts sub-district (being cell initial search) or portable terminal switch in the minizone in the process of (being the sub-district gravity treatment), because the crystal oscillator frequency of portable terminal and base station may exist than mistake, thereby cause the frequency of portable terminal and the frequency of base station to have bigger frequency shift (FS) (frequency deviation).If have bigger frequency deviation between base station and the portable terminal, will influence the correct transmission and the reception of signal between base station and the portable terminal, and can cause interference to the signal of other portable terminal and base station communication.Therefore, in cell initial search and cell reselection process, need to carry out the frequency deviation adjustment,, reduce system interference with the receive frequency of calibration portable terminal.
At LTE (Long Term Evolution, Long Term Evolution) designed synchronizing signal in the system, synchronizing signal comprises: primary synchronization channel PSCH (Primary Synchronization Channel) signal and auxiliary synchronization channel SSCH (Secondary Synchronization Channel) signal.Can carry out frequency offset estimating by these two kinds of synchronizing signals in system: utilize the PSCH signal to carry out the frequency deviation rough estimate, frequency deviation rough estimate scope is [15KHz, 15KHz]; Utilize PSCH and SSCH signal to carry out the smart estimation of frequency deviation, the smart estimation range of frequency deviation is [2330Hz, 2330Hz].As shown in Figure 1, the base station includes 20 slot (time slot) in 1 frame data that portable terminal sends, and average every field has 10 slot.In every field data, include certain sampling point data, for example under the situation for the 1.4MHz bandwidth, include 9600 sampling point data in the field data.Usually comprise 7 OFDM (Orthogonal FrequencyDivision Multiplexing among each slot, Orthogonal Frequency Division Multiplexing) symbol, in an OFDM symbol, include CP (Cyclic Prefix, Cyclic Prefix) signal and the data behind the CP signal.Last OFDM symbol of the slot11 of last the OFDM symbol of the slot1 of field data and later half frame data before the SSCH signal data is arranged in; The 3rd the OFDM symbol of the slot12 of the 3rd the OFDM symbol of the slot2 of field data and later half frame data before the PSCH signal data is arranged in.
Receive the Frame of base station transmission at portable terminal after, prior art obtains PSCH, the SSCH signal in the Frame, and utilizes the PSCH that obtains, the concrete grammar that the SSCH signal carries out frequency offset estimating, and is shown in Figure 2 as flow process, comprises the steps:
S201: portable terminal is made related operation with the several PSCH sequences in the terminal and the frame data of reception respectively after the field data that receive the base station transmission, obtain correlated series respectively.
Portable terminal can not be determined the particular location of PSCH signal in frame at once after the field data that receive the base station transmission, also just can not accurately obtain the PSCH sequence in PSCH signal and the PSCH signal.And in predefined several PSCH sequences is identical in the PSCH sequence in the PSCH signal and the portable terminal.These several predefined PSCH sequences of used for mobile terminal are made related operation with the field data that receive respectively such as PSCH0, PSCH1, PSCH2, obtain correlated series CH0, CH1, CH2 (as shown in Figure 3) respectively.
S202: the maximum in the correlated series of determining to obtain.
The correlated series that calculates is made up of a series of correlation point, and the number of correlation point is identical with sampling point data number in the field data.From each correlated series that calculates, find out the maximum related value point.For example, in each correlation of the CH0 of Fig. 3 schematic diagram, CH1, CH2 sequence, the 2200th correlation of determining among the CH2 is the maximum in all correlations.
S203: determine that the pairing PSCH sequence of maximum is the PSCH sequence of PSCH signal in the field data that portable terminal receives.
For example, the 2200th correlation among the CH2 of Fig. 3 is the maximum in all correlations, determines that then the PSCH2 sequence of making related operation with Frame is the PSCH sequence in the PSCH signal that receives of portable terminal.Promptly because the PSCH2 sequence is identical with PSCH sequence in the PSCH signal, so do to obtain maximum correlation value behind the related operation.
S204: according to the starting point t of PSCH signal in the position specified data frame in the maximum correlated series of living in
0
Also can determine the starting point t of PSCH signal according to maximum
0As shown in Figure 4, when the PSCH of portable terminal sequence just in time with Frame in the PSCH signal identical PSCH sequence make related operation, to obtain maximum correlation this moment, and the initial sampling point data position of making related operation at this moment in the PSCH sequence of portable terminal and this Frame is the starting point of PSCH signal.
S205: from starting point t
0Begin intercepting and obtain the PSCH signal, and according to starting point t
0Intercepting obtains the SSCH signal.
From starting point t
0Begin intercepting and obtain the PSCH signal; Because SSCH signal place OFDM symbol is before the OFDM symbol of PSCH signal place, and 2 the OFDM symbols in interval, therefore at starting point t
03 OFDM symbol place interceptings obtain the SSCH signal at interval before.
S206: the PSCH signal according to obtaining, calculate thick frequency offset estimating value; SSCH signal according to obtaining calculates smart frequency offset estimating value.
S207: the frequency of proofreading and correct portable terminal according to the frequency offset estimating value of calculating.
After the frequency of portable terminal is proofreaied and correct, eliminated the frequency departure between base station and the portable terminal, thereby guaranteed the correct reception of portable terminal signal.
For the subsequent data frame that in cell initial search or reuse adoption process, receives, the starting point t that determines according to above-mentioned steps S204
0, repeating step S205-S207.That is to say, then needn't repeat to determine starting point t again for the Frame of follow-up reception
0, but according to the previous starting point t that determines
0Directly intercepting obtains PSCH or SSCH signal in Frame, and according to PSCH or the SSCH signal carries out frequency offset estimating and frequency correction gets final product.
In order more accurately to obtain PSCH or SSCH signal, can carry out the correlation computations of above-mentioned steps S201 to a plurality of field data respectively, and after the corresponding addition of the correlation that a plurality of field data computation are gone out, determine maximum related value again, determine starting point t according to this maximum related value
0And the PSCH sequence in the PSCH signal.Like this, the starting point t that determines according to a plurality of field data
0The starting point t that beguine is determined according to single field data
0More more accurate.
The present inventor find sub-district first search or reuse adoption process in, channel might change, and causes the starting point of the Frame PSCH signal of the follow-up reception of portable terminal to change, and this moment starting point t still before to have determined
0Intercept PSCH or SSCH signal, might cause the intercepting of PSCH or SSCH signal error to occur, and finally cause according to the frequency offset estimating value of PSCH, SSCH calculated signals inaccurately, make portable terminal correcting frequency shift preferably.As shown in Figure 5, search in the process the first of sub-district, portable terminal has been determined the starting point t of PSCH signal according to 2 frames (4 fields) data that send at first
0And the PSCH sequence in the PSCH signal.But because influences such as channel variation cause the starting point of the PSCH signal of some follow-up Frames to change into t ', and this moment is still according to the previous starting point t that determines
0Intercepting PSCH signal, error appears in the PSCH signal that causes intercepting acquisition.
Summary of the invention
The embodiment of the invention provides a kind of synchronizing signal starting point to determine method and device, in order to determine the starting point of primary synchronization channel PSCH signal more accurately.
The embodiment of the invention provides a kind of synchronizing signal preparation method and device, obtains primary synchronization channel PSCH signal or auxiliary synchronization channel SSCH signal in order to intercepting more accurately.
A kind of synchronizing signal starting point is determined method, comprising:
According to primary synchronization channel PSCH signal starting point, determine the operating range of the Frame of current reception at the Frame of preceding reception;
In the operating range of determining, carry out related operation, obtain correlated series;
According to the point of the maximum related value in the described correlated series, determine the starting point of the Frame PSCH signal of current reception.
Describedly in the operating range of determining, carry out related operation and specifically comprise:
Definite PSCH sequence in the PSCH of preceding receiving data frames signal and the data point in the described operating range are carried out related operation.
Described basis is determined the operating range of the Frame of current reception in the PSCH of the Frame of preceding reception signal starting point, specifically comprises:
With corresponding as datum mark in the Frame of current reception with the PSCH signal starting point of described Frame in preceding reception;
Subtracting the cyclic prefix CP value with described datum mark, to add the CP value as lower limit, datum mark be the upper limit, determines described operating range.
A kind of synchronizing signal preparation method comprises:
According to PSCH signal starting point, determine the operating range of the Frame of current reception at the Frame of preceding reception;
In the operating range of determining, carry out related operation, obtain correlated series;
According to the point of the maximum related value in the described correlated series, determine the starting point of the Frame PSCH signal of current reception;
Starting point according to the Frame PSCH signal of the current reception of determining obtains PSCH signal and/or auxiliary synchronization channel SSCH signal from the Frame of described current reception.
A kind of synchronizing signal starting point is determined device, comprising:
The operating range determination module is used for the primary synchronization channel PSCH signal starting point of basis at the Frame of preceding reception, determines the operating range of the Frame of current reception;
Computing module is used for carrying out related operation in the operating range of the Frame of the current reception that described operating range determination module is determined, and obtains correlated series;
The maximum determination module is used for determining the maximum related value point of the correlated series that described computing module obtains;
The starting point determination module is used for the starting point of PSCH signal of the Frame of the definite current reception of maximum related value point determined according to described maximum determination module.
A kind of synchronizing signal obtains device, comprising:
The operating range determination module is used for the primary synchronization channel PSCH signal starting point of basis at the Frame of preceding reception, determines the operating range of the Frame of current reception;
Computing module is used for carrying out related operation in the operating range of the Frame of the current reception that described operating range determination module is determined, and obtains correlated series;
The maximum determination module is used for determining the maximum related value point of the correlated series that described computing module obtains;
The starting point determination module is used for the starting point of PSCH signal of the Frame of the definite current reception of maximum related value point determined according to described maximum determination module;
Signal obtains module, obtains PSCH signal and/or SSCH signal in order to the PSCH signal starting point determined according to described starting point determination module from the Frame of current reception.
The embodiment of the invention since the PSCH signal starting point of the Frame that will before receive as the datum mark of the Frame of follow-up reception, after one related operation scope determining the Frame of follow-up reception is carried out related operation once more, can obtain the PSCH signal starting point of the Frame of follow-up reception more accurately.Therefore, even channel changes, starting point changes, also can formerly determine on the basis of the PSCH signal starting point of the Frame of preceding reception, in the Frame of follow-up reception one redefines starting point among a small circle, thereby has determined the starting point of PSCH signal more accurately.
Starting point according to the signal of determining of PSCH more accurately intercepts acquisition PSCH or SSCH signal, obtains PSCH or SSCH signal thereby can more accurately intercept.
Description of drawings
Fig. 1 is the Frame schematic diagram that comprises the PSCH signal of prior art;
Fig. 2 is the acquisition PSCH signal of prior art and the method flow diagram that carries out frequency offset estimating according to the PSCH signal;
Fig. 3 makes the schematic diagram of related operation for the Frame to receiving of prior art;
Fig. 4 determines the schematic diagram of PSCH signal starting point for prior art according to maximum related value;
Fig. 5 is the schematic diagram that the channel variation of prior art causes PSCH signal starting point to change;
Fig. 6 is the embodiment of the invention schematic diagram of phasing pass operating range really;
Fig. 7 is definite PSCH signal starting point of the embodiment of the invention, the flow chart that intercepting obtains the PSCH signal method;
Carry out the schematic diagram of related operation in the related operation scope of determining according to datum mark of Fig. 8 for the embodiment of the invention;
Fig. 9 a is the structure chart that the PSCH signal starting point of the embodiment of the invention is determined device;
Fig. 9 b is the structure chart that the PSCH signal of the embodiment of the invention obtains device.
Embodiment
The technical scheme that the embodiment of the invention provides is for calculating the starting point t of PSCH signal according to the Frame that receives earlier
0And the PSCH sequence in the PSCH signal, for the Frame of follow-up reception, with starting point t
0As benchmark, in the Frame of current reception, determine an operating range, in this operating range, carry out related operation and obtain maximum correlation, determine the starting point of the Frame PSCH signal of current reception according to the maximum correlation that calculates.Like this,, cause follow-up Frame PSCH signal starting point to change, by at t even channel changes
0Carry out related operation once more near the operating range, seek maximum correlation once more and can determine the PSCH signal starting point of the Frame of current reception more accurately, thereby intercept PSCH or SSCH signal accurately.
As shown in Figure 6, determine the starting point t of PSCH signal according to the Frame that receives earlier
0And the PSCH sequence in the PSCH signal, but subsequently, because channel changes, the PSCH signal starting point of subsequent data frame changes, and changes into t '; Owing to the change of the PSCH signal starting point that causes because of channel variation is more small, therefore carry out related operation a small range, obtain maximum correlation, can determine altered PSCH signal starting point.And because just at t
0Near one carry out related operation in more among a small circle, and needn't carry out related operation to whole Frame, and therefore the amount of calculation that increases is little, and the system-computed time-delay is very short, but can determine PSCH signal starting point more accurately, and accurately intercepting obtains PSCH or SSCH signal.
A kind of definite PSCH signal starting point that the embodiment of the invention provides and intercepting obtain the concrete grammar of PSCH, SSCH signal, and flow chart comprises following concrete steps as shown in Figure 7:
S701: in cell initial search or reuse adoption process, portable terminal is determined PSCH signal starting point t according to the Frame that receives at first
0And the PSCH sequence in the PSCH signal.
In cell initial search or reuse adoption process, portable terminal is determined PSCH signal starting point t according to the Frame that receives at first
0And the method for the PSCH sequence in the PSCH signal, the same with definite method of the prior art of aforementioned introduction, mainly be that the Frame of whole reception is made related operation, obtain maximum correlation after, determine PSCH signal starting point t according to maximum correlation
0And the PSCH sequence in the PSCH signal.
S702: receive follow-up Frame, and determine the datum mark of the Frame of current reception, and determine the operating range of the Frame of current reception according to the previous data frame PSCH signal starting point of determining.
With in the Frame of current reception with the datum mark of the corresponding Frame as this current reception of the PSCH signal starting point of the previous Frame that receives.For example, before determined one at the PSCH of the Frame of preceding reception signal starting point t
0Be the 2000th sampling point data in the Frame of preceding reception, determine that then the 2000th sampling point data of the Frame of current reception are datum mark.
Determine the operating range of the Frame of current reception according to datum mark, promptly determine a less operating range (being the related operation scope) according to datum mark in the Frame of current reception, the sampling point data in the related operation scope are less than the sampling point data in the Frame of current reception.Such as, the Frame of current reception comprises 9600 sampling point data, then near 400 sampling point data or the littler related operation scope datum mark of Que Dinging.Those skilled in the art can have the method for multiple definite related operation scope according to actual conditions.Such as, rule of thumb setting datum mark n sampling point data in the past is related operation scope (n and m can be set according to actual conditions by those skilled in the art) to the scope between m the later sampling point data of datum mark.Perhaps, in datum mark ± CP value scope, be defined as related operation scope (promptly subtracting the cyclic prefix CP value with described datum mark, to add the CP value as lower limit, datum mark be the upper limit, determines the related operation scope of the Frame of current reception).For example, under the situation of 1.4M bandwidth, the length of CP is 10 in the OFDM symbol, then with [t
0-10, t
0+ 10] scope is defined as the related operation scope.
S703: in the related operation scope, carry out related operation, obtain correlated series.
Because in cell initial search (gravity treatment) process, identical in the PSCH sequence of the PSCH signal in the Frame of follow-up reception and the previous Frame that receives, therefore according to the PSCH sequence of in S701, having determined the PSCH signal, carry out in the process of related operation in related operation scope the Frame of follow-up reception, portable terminal with regard to will not predefined a plurality of PSCH sequences respectively with the related operation scope in data carry out related operation, and only need to carry out related operation with the data in PSCH sequence of having determined and the related operation scope, obtain correlated series (as shown in Figure 8).
Certainly, portable terminal also can with predefined a plurality of PSCH sequences respectively with the related operation scope in data carry out related operation, obtain a plurality of correlated serieses, determine maximum correlation at last.But obviously such amount of calculation has just increased.
S704: the maximum correlation in the correlated series of determining to obtain.
S705: the PSCH signal starting point t that determines the Frame of current reception according to maximum correlation
1, intercepting PSCH signal and/or SSCH signal.
Determine the PSCH signal starting point t of the Frame of current reception according to maximum correlation
1, and the starting point t from determining
1Begin to intercept the PSCH signal and from starting point t
1Preceding 3 OFDM symbol places begin intercepting and obtain the SSCH signal.Owing in subsequent treatment, do not need to utilize the PSCH signal sometimes, therefore needn't all obtain the PSCH signal for each Frame, also only intercepting obtains the SSCH signal.
Determine the PSCH signal starting point t of the Frame of current reception according to maximum correlation
1Method and the previous data frame PSCH signal starting point t that determines according to maximum correlation of prior art
0Method identical, repeat no more herein.
For the Frame that follow-up continuation receives, circulation execution in step S702-S705 finishes up to cell initial search (gravity treatment) process.Receiving, handle in the process of subsequent data frame in circulation, both can be that portable terminal is determined PSCH signal starting point t according to the Frame that receives at first for previous data frame PSCH signal starting point among the step S702
0, also can be other starting point at the PSCH of the Frame of preceding reception signal.For example, portable terminal adopts the method for prior art to determine the PSCH signal starting point t of these 2 frame data according to 2 frame data (4 field data) that receive at first
0, when receiving the 5th field data, then according to the method for the step S702-S705 of the embodiment of the invention, with the previous t that determines
0As datum mark, determine the PSCH signal starting point t of the 5th field data
5Afterwards, portable terminal receives the 6th field data again, then both can be with t
0Determine the PSCH signal starting point t of the 6th field data as datum mark
6, also can be with t
5Determine the PSCH signal starting point t of the 6th field data as datum mark
6After portable terminal receives the 7th field data, then can be with the PSCH signal starting point of previous any one field data (such as t
0, t
5, t
6) determine the PSCH signal starting point t of the 7th field data as datum mark
7Certainly, consider that the starting point between the adjacent field data differs less, then can be with at the starting point of preceding adjacent Frame datum mark as current data frame.
A kind of synchronizing signal starting point that the embodiment of the invention provides is determined device, shown in Fig. 9 a, comprising: initial starting point determination module 901, operating range determination module 902, computing module 903, maximum determination module 904, starting point determination module 905.
Initial starting point determination module 901 is used for determining the PSCH signal starting point of the Frame that receives at first at cell initial search or reuse adoption process.
Operating range determination module 902 is used for the PSCH signal starting point definite according to described initial starting point determination module, determines the related operation scope of the Frame of current reception.The method of the related operation scope of concrete definite current receiving data frames repeats no more as hereinbefore herein.
Operating range determination module 902 specifically comprises:
The datum mark determining unit, the PSCH signal starting point that is used for initial starting point determination module 901 is determined is as datum mark;
The operating range determining unit is used for determining operating range for the datum mark that the Frame of current reception is determined according to the datum mark determining unit.
The data that computing module 903 is used in the operating range of Frame of current reception that operating range determination module 902 is determined are made related operation, obtain correlated series.
Starting point determination module 905 is used for determining according to the maximum related value points that maximum determination module 904 is determined the starting point of PSCH signal of the Frame of current reception.
Further, determine the starting point of PSCH signal of Frame of follow-up reception at starting point determination module 905 after, starting point determination module 905 can also output to operating range determination module 902 with the starting point of the PSCH signal of each Frame of determining.Operating range determination module 902 can also be determined the related operation scope of the Frame of current reception according to the starting point that receives after the PSCH signal starting point that receives 905 outputs of starting point determination module.Concrete, can be with at the PSCH signal starting point of the Frame of preceding adjacent reception datum mark such as operating range determination module 902 as the Frame of current reception, determine current reception Frame datum mark ± the CP scope is the operating range that carries out related operation.
A kind of synchronizing signal intercepting that the embodiment of the invention provides obtains device, shown in Fig. 9 b, comprising: initial starting point determination module 901, operating range determination module 902, computing module 903, maximum determination module 904, starting point determination module 905, signal obtain module 906.
Obtain in the device in the intercepting of PSCH signal, initial starting point determination module 901, operating range determination module 902, computing module 903, maximum determination module 904, starting point determination module 905 determine that with above-mentioned a kind of PSCH signal starting point the function of the respective modules in the device is identical, repeat no more herein.
Signal obtains PSCH signal starting point that module 906 is used for the current receiving data frames determined according to starting point determination module 905 and obtains PSCH signal and/or SSCH signal from the Frame intercepting of current reception.The method of concrete intercepting repeats no more as hereinbefore herein.
The embodiment of the invention since the PSCH signal starting point of the Frame that will before receive as the datum mark of the Frame of follow-up reception, and after determining near this datum mark that a less related operation scope is carried out related operation once more, obtain the PSCH signal starting point of the Frame of follow-up reception.Therefore, even channel changes, starting point changes, and also can redefine starting point among a small circle at one, thereby determine the starting point of PSCH signal more accurately.
Starting point according to the signal of determining of PSCH more accurately intercepts acquisition PSCH, SSCH signal, obtains PSCH, SSCH synchronizing signal thereby can more accurately intercept.
One of ordinary skill in the art will appreciate that all or part of step that realizes in the foregoing description method is to instruct relevant hardware to finish by program, this program can be stored in the computer read/write memory medium, as: ROM/RAM, magnetic disc, CD etc.
The above only is a preferred implementation of the present invention; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (13)
1, a kind of synchronizing signal starting point is determined method, it is characterized in that, comprising:
According to primary synchronization channel PSCH signal starting point, determine the operating range of the Frame of current reception at the Frame of preceding reception;
In the operating range of determining, carry out related operation, obtain correlated series;
According to the point of the maximum related value in the described correlated series, determine the starting point of the Frame PSCH signal of current reception.
2, the method for claim 1 is characterized in that, described Frame in preceding reception refers to: the Frame that in cell initial search or reuse adoption process, receives at first, perhaps, the Frame of adjacent reception before the Frame of described current reception.
3, method as claimed in claim 1 or 2 is characterized in that, describedly carries out related operation in the operating range of determining, specifically comprises:
Definite PSCH sequence in the PSCH of preceding receiving data frames signal and the data point in the described operating range are carried out related operation.
4, method as claimed in claim 1 or 2 is characterized in that, described basis is determined the operating range of the Frame of current reception in the PSCH of the Frame of preceding reception signal starting point, specifically comprises:
With corresponding as datum mark in the Frame of current reception with the PSCH signal starting point of described Frame in preceding reception;
Subtracting the cyclic prefix CP value with described datum mark, to add the CP value as lower limit, datum mark be the upper limit, determines described operating range.
5, a kind of synchronizing signal preparation method is characterized in that, comprising:
According to PSCH signal starting point, determine the operating range of the Frame of current reception at the Frame of preceding reception;
In the operating range of determining, carry out related operation, obtain correlated series;
According to the point of the maximum related value in the described correlated series, determine the starting point of the Frame PSCH signal of current reception;
Starting point according to the Frame PSCH signal of the current reception of determining obtains PSCH signal and/or auxiliary synchronization channel SSCH signal from the Frame of described current reception.
6, method as claimed in claim 5 is characterized in that, described Frame in preceding reception refers to: the Frame that in cell initial search or reuse adoption process, receives at first, perhaps, the Frame of adjacent reception before the Frame of described current reception.
As claim 5 or 6 described methods, it is characterized in that 7, described basis is determined the operating range of the Frame of current reception in the PSCH of the Frame of preceding reception signal starting point, specifically comprises:
With corresponding as datum mark in the Frame of current reception with the PSCH signal starting point of described Frame in preceding reception;
Subtracting the cyclic prefix CP value with described datum mark, to add the CP value as lower limit, datum mark be the upper limit, determines described operating range.
8, a kind of synchronizing signal starting point is determined device, it is characterized in that, comprising:
The operating range determination module is used for the primary synchronization channel PSCH signal starting point of basis at the Frame of preceding reception, determines the operating range of the Frame of current reception;
Computing module is used for carrying out related operation in the operating range of the Frame of the current reception that described operating range determination module is determined, and obtains correlated series;
The maximum determination module is used for determining the maximum related value point of the correlated series that described computing module obtains;
The starting point determination module is used for the starting point of PSCH signal of the Frame of the definite current reception of maximum related value point determined according to described maximum determination module.
9, device as claimed in claim 8 is characterized in that, also comprises:
Initial starting point determination module is used for determining the PSCH signal starting point of the Frame that receives at first at cell initial search or reuse adoption process; And
The PSCH signal starting point that described operating range determination module specifically is used for the Frame that receives at first that described initial starting point determination module is determined is as the PSCH signal starting point at the Frame of preceding reception, and determines the operating range of the Frame of current reception according to the PSCH signal starting point of described Frame in preceding reception.
10, device as claimed in claim 8 is characterized in that,
The starting point of PSCH signal that described starting point determination module also is used for the Frame of the current reception that will determine outputs to described operating range determination module; And
Described operating range determination module also is used for the PSCH signal starting point that will receive from described starting point determination module as the PSCH signal starting point at the Frame of preceding reception, and determines the operating range of the Frame of current reception according to the PSCH signal starting point of described Frame in preceding reception.
11, a kind of synchronizing signal obtains device, it is characterized in that, comprising:
The operating range determination module is used for the primary synchronization channel PSCH signal starting point of basis at the Frame of preceding reception, determines the operating range of the Frame of current reception;
Computing module is used for carrying out related operation in the operating range of the Frame of the current reception that described operating range determination module is determined, and obtains correlated series;
The maximum determination module is used for determining the maximum related value point of the correlated series that described computing module obtains;
The starting point determination module is used for the starting point of PSCH signal of the Frame of the definite current reception of maximum related value point determined according to described maximum determination module;
Signal obtains module, obtains PSCH signal and/or SSCH signal in order to the PSCH signal starting point determined according to described starting point determination module from the Frame of current reception.
12, device as claimed in claim 11 is characterized in that, also comprises:
Initial starting point determination module is used for determining the PSCH signal starting point of the Frame that receives at first at cell initial search or reuse adoption process; And
The PSCH signal starting point that described operating range determination module specifically is used for the Frame that receives at first that described initial starting point determination module is determined is as the PSCH signal starting point at the Frame of preceding reception, and determines the operating range of the Frame of current reception according to the PSCH signal starting point of described Frame in preceding reception.
13, device as claimed in claim 11 is characterized in that,
The starting point of PSCH signal that described starting point determination module also is used for the Frame of the current reception that will determine outputs to described operating range determination module; And
Described operating range determination module also is used for the PSCH signal starting point that will receive from described starting point determination module as the PSCH signal starting point at the Frame of preceding reception, and determines the operating range of the Frame of current reception according to the PSCH signal starting point of described Frame in preceding reception.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200810116649 CN101631098B (en) | 2008-07-14 | 2008-07-14 | Method and device for acquiring synchronizing signal and determining starting point |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200810116649 CN101631098B (en) | 2008-07-14 | 2008-07-14 | Method and device for acquiring synchronizing signal and determining starting point |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101631098A true CN101631098A (en) | 2010-01-20 |
| CN101631098B CN101631098B (en) | 2012-12-05 |
Family
ID=41576048
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200810116649 Active CN101631098B (en) | 2008-07-14 | 2008-07-14 | Method and device for acquiring synchronizing signal and determining starting point |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101631098B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107396439A (en) * | 2017-08-16 | 2017-11-24 | 维沃移动通信有限公司 | A frequency adjustment method and mobile terminal |
| CN110266429A (en) * | 2019-04-18 | 2019-09-20 | 四川大学 | A Signal Frame Structure Detection Method Based on Higher Order Cumulants |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006067657A1 (en) * | 2004-12-24 | 2006-06-29 | Koninklijke Philips Electronics N.V. | Method and apparatus for cell search in wireless communication system |
| CN101009513B (en) * | 2006-01-26 | 2013-02-13 | 上海原动力通信科技有限公司 | Cell synchronization method and initial cell searching method for broadband time-division dual-duplex cellular system |
| CN101056139B (en) * | 2007-05-24 | 2012-07-11 | 重庆重邮信科通信技术有限公司 | Method for realizing the downlink rough synchronization in the initial search process of TD-SCDMA system cell |
-
2008
- 2008-07-14 CN CN 200810116649 patent/CN101631098B/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107396439A (en) * | 2017-08-16 | 2017-11-24 | 维沃移动通信有限公司 | A frequency adjustment method and mobile terminal |
| CN107396439B (en) * | 2017-08-16 | 2020-03-10 | 维沃移动通信有限公司 | Frequency adjustment method and mobile terminal |
| CN110266429A (en) * | 2019-04-18 | 2019-09-20 | 四川大学 | A Signal Frame Structure Detection Method Based on Higher Order Cumulants |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101631098B (en) | 2012-12-05 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108123774B (en) | A downlink synchronization method and system for narrowband internet of things | |
| US9986521B1 (en) | Systems and methods for detecting a primary synchronization signal in a wireless communication system | |
| CN101009513A (en) | Cell synchronization method and initial cell searching method for broadband time-division dual-duplex cellular system | |
| CN108683482B (en) | Method and device for estimating timing position | |
| CN102356671A (en) | Method and device of communication system frequency search | |
| CN104754623A (en) | Cell searching method and system based on interference elimination of LTE (Long Term Evolution) system | |
| CN100415029C (en) | Apparatus and method for estimating initial frequency offset in an asynchronous mobile communication system | |
| US7373250B2 (en) | AGPS module time synchronization method and device using system time information in mobile terminal | |
| CN110677364A (en) | Method and device for detecting main synchronization signal | |
| CN115002894B (en) | Uplink timing synchronization method, device, equipment and storage medium | |
| CN102347918B (en) | Fine frequency offset method of estimation and device | |
| CN103188067B (en) | A kind of chip clock frequency departure estimation error of spread spectrum system and the method for correction | |
| EP2787667B1 (en) | LTE cell detecting apparatus in multi-cell environment | |
| CN100591063C (en) | Method and apparatus for acquiring circulating prefix-length information | |
| CN108989259A (en) | The time offset estimation method and system of wireless comprehensive test instrument narrowband Physical Uplink Shared Channel | |
| CN103428846B (en) | Cell synchronous location filtering method, device and equipment | |
| CN101631098B (en) | Method and device for acquiring synchronizing signal and determining starting point | |
| CN102271384A (en) | Primary cell searching method for long term evolution (LTE) system | |
| CN109526003B (en) | Method and device for detecting uplink signal of target terminal | |
| JP6262861B2 (en) | Position determination method, apparatus, and computer storage medium | |
| CN114745775A (en) | Frequency offset estimation method and device in wireless communication system | |
| GB2571277A (en) | Method for fine timing synchronisation | |
| KR100311515B1 (en) | Cell Search Device and Method in Mobile Communication System | |
| CN103297995B (en) | The acquisition methods of master sync signal timing and device | |
| EP2515456B1 (en) | Receiving apparatus and method for multi-frame synchronization |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| ASS | Succession or assignment of patent right |
Owner name: INST OF TELECOMMUNICATION SCIENCE AND TECHNOLGOY Free format text: FORMER OWNER: DATANG MOBILE COMMUNICATION EQUIPMENT CO., LTD. Effective date: 20110429 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 100083 NO. 29, XUEYUAN ROAD, HAIDIAN DISTRICT, BEIJING TO: 100191 NO. 40, XUEYUAN ROAD, HAIDIAN DISTRICT, BEIJING |
|
| TA01 | Transfer of patent application right |
Effective date of registration: 20110429 Address after: 100191 Haidian District, Xueyuan Road, No. 40, Applicant after: CHINA ACADEMY OF TELECOMMUNICATIONS TECHNOLOGY Address before: 100083 Haidian District, Xueyuan Road, No. 29, Applicant before: DATANG MOBILE COMMUNICATIONS EQUIPMENT Co.,Ltd. |
|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 100191 No. 40, Haidian District, Beijing, Xueyuan Road Patentee after: CHINA ACADEMY OF TELECOMMUNICATIONS TECHNOLOGY Address before: 100191 No. 40, Haidian District, Beijing, Xueyuan Road Patentee before: CHINA ACADEMY OF TELECOMMUNICATIONS TECHNOLOGY |
|
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20210601 Address after: 100085 1st floor, building 1, yard 5, Shangdi East Road, Haidian District, Beijing Patentee after: DATANG MOBILE COMMUNICATIONS EQUIPMENT Co.,Ltd. Address before: 100191 No. 40, Haidian District, Beijing, Xueyuan Road Patentee before: CHINA ACADEMY OF TELECOMMUNICATIONS TECHNOLOGY |