CN102075237A - Method and device for searching master sync signal - Google Patents
Method and device for searching master sync signal Download PDFInfo
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- CN102075237A CN102075237A CN2010106203798A CN201010620379A CN102075237A CN 102075237 A CN102075237 A CN 102075237A CN 2010106203798 A CN2010106203798 A CN 2010106203798A CN 201010620379 A CN201010620379 A CN 201010620379A CN 102075237 A CN102075237 A CN 102075237A
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Abstract
The invention discloses a method and a device for searching a master sync signal, the method comprises the following steps: a terminal groups the read air interface data, processes each group of the air interface data and respectively obtains a sampling point sequence having set length; and the terminal processes the sampling point sequence with a time frequency transformation accelerator. In an embodiment of the invention, the terminal groups the read air interface data, controls length of the sampling point sequence to be a set length convenient for transformation, and processes the sampling point sequence with the time frequency transformation accelerator, so that time consumption is short, and efficiency is high.
Description
Technical field
The present invention relates to the communications field, relate in particular to a kind of searching method and equipment of master sync signal.
Background technology
In LTE (Long Time Evolution, the Long Term Evolution) system, the sub-district
Constitute by two parts:
Wherein
With
Number in called after sub-district group number and the group respectively.Behind starting up of terminal, at first to carry out Cell searching, so that obtain available cell
This terminal also must obtain synchronous for the downgoing time of this sub-district simultaneously.When above 2 conditions all satisfied, terminal had just obtained the down-going synchronous to this sub-district, and the MIB (Management Information Base, management information bank) that just can read this sub-district thus is to obtain system information.One of committed step of Cell searching is exactly to search for the PSS of this sub-district (Primary Sync Signal, master sync signal) among the LTE, because PSS has implied
This is to obtain the sub-district
Necessary condition.While terminal in the process of search PSS can also obtain the 5ms time synchronized of this sub-district, and this also is the necessary condition of sub-district time synchronized.Therefore, the search of the PSS of LTE system has very important meaning for terminal.
In the searching method of the PSS that provides in the prior art, terminal is at the data of once eating dishes without rice or wine to read 5ms totally 153600 sampled points, then these sampled points are carried out filtering, 16 times down-sampled, 9600 sampled points that obtain the most at last are relevant through the PSS sequence with this locality storage behind the time-frequency conversion, obtain according to correlated results
With the 5ms time synchronized.
But, the searching method of this PSS, down-sampled back 9600 when time-frequency conversion data volume bigger, and can not utilize the conversion accelerator of DSP (Digital Signal Processing, Digital Signal Processing) configuration, therefore length consuming time, efficient is low.
Summary of the invention
The embodiment of the invention provides a kind of searching method and equipment of master sync signal, the efficient of time-frequency conversion in the search procedure of raising PSS, weak point consuming time.
The embodiment of the invention provides a kind of searching method of master sync signal, comprising:
The data of eating dishes without rice or wine that terminal will read are divided into groups, and the every group of data of eating dishes without rice or wine are handled and obtained respectively the sampled point sequence of preseting length;
Described terminal utilizes the time-frequency conversion accelerator that described sampled point sequence is handled.
The embodiment of the invention provides a kind of search equipment of master sync signal, comprising:
Grouped element is used for the data of eating dishes without rice or wine that read are divided into groups, and the every group of data of eating dishes without rice or wine is handled and obtained respectively the sampled point sequence of preseting length;
Processing unit is used to utilize the time-frequency conversion accelerator that described sampled point sequence is handled.
Compared with prior art, the embodiment of the invention has the following advantages at least:
The data of eating dishes without rice or wine that terminal will read are carried out packet transaction, and the length of sampled point sequence is controlled to be the length of carrying out conversion process that is beneficial to of setting, utilize the time-frequency conversion accelerator that the sampled point sequence is handled, weak point consuming time, efficient height.
Description of drawings
In order to be illustrated more clearly in embodiments of the invention or technical scheme of the prior art, to do to introduce simply to the accompanying drawing of required use in embodiments of the invention or the description of the Prior Art below, apparently, accompanying drawing in describing below only is some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the schematic flow sheet of the searching method of the master sync signal that provides of the embodiment of the invention one;
Fig. 2 is the generative process schematic diagram of the correlated series that provides of the embodiment of the invention two;
Fig. 3 is the detailed process schematic diagram of the searching method of the master sync signal that provides of the embodiment of the invention two;
Fig. 4 is the peak value analogous diagram of the PSS time domain sequences that provides of the embodiment of the invention two;
Fig. 5～8th, the structural representation of the search equipment of the master sync signal that the embodiment of the invention three provides.
Embodiment
Below in conjunction with the accompanying drawing in the embodiments of the invention, the technical scheme in the embodiments of the invention is clearly and completely described, obviously, the embodiments described below only are the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills are not making the every other embodiment that is obtained under the creative work prerequisite, all belong to the scope of embodiments of the invention protection.
Embodiment one
The embodiment of the invention one provides a kind of searching method of master sync signal, as shown in Figure 1, comprising:
Described terminal is utilized the time-frequency conversion accelerator that described sampled point sequence is handled to comprise: described terminal utilizes the time-frequency conversion accelerator of DSP configuration that described sampled point sequence is carried out frequency domain transform, and the result that frequency domain is changed carries out the relevant PSS frequency domain sequence that obtains with local correlated series; Described terminal is utilized the time-frequency conversion accelerator that described PSS frequency domain sequence is carried out spatial transform and is obtained the PSS time domain sequences.
Described preseting length comprises or 1024 points at 2048.
When described preseting length is at 2048, the data of eating dishes without rice or wine that described terminal will read are divided into groups, the every group of data of eating dishes without rice or wine are handled and the sampled point sequence that obtains preseting length respectively comprises: the data of eating dishes without rice or wine that described terminal will read are divided into 6 groups of sampled point sequences that comprise 30720 sampled points respectively, and it is 2048 sampled point sequence that every group of sampled point sequence carried out 15 times of down-sampled length that obtain.Accordingly, described terminal is utilized the time-frequency conversion accelerator that described sampled point sequence is handled to comprise: described terminal utilizes the time-frequency conversion accelerator of DSP configuration that every group of sampled point sequence carried out frequency domain transform, and the result that frequency domain changes carried out the relevant PSS frequency domain sequence that obtains with local correlated series, the PSS frequency domain sequence that conversion is obtained carries out spatial transform and obtains the PSS time domain sequences; Described terminal writes down maximum point power and the maximum residing sampling point position of power points in each PSS time domain sequences, the maximum in each maximum point power is made as peak power, and writes down described peak power corresponding sampling points position.
Wherein, the generating mode of described local correlated series comprises:
According to preset strategy numbering in the group is set
Value, generate the local PSS frequency domain sequence that calculates;
The PSS frequency domain sequence that obtains is done inverse FFT obtain the PSS time domain sequences, obtain local sequence PSS_LOCAL according to this PSS time domain sequences;
The PSS_LOCAL sequence is carried out 15 times of down-sampled dropping to, obtain sequence Q;
Sequence Q is done fast Fourier transform obtain local correlated series.
Embodiment two
The embodiment of the invention two provides a kind of searching method of master sync signal, for clear this method of introducing, be that 20M, channel are that AWGN+3GPP " EVA-70 " (expanding vehicle-mounted model A type channel), SNR (Signal to Noise Ratio, signal to noise ratio)=10 describe for example with the system bandwidth in the present embodiment.
At first introduce the generative process of the local correlated series of terminal in the present embodiment, concrete, terminal generates three groups of local correlated series S (0), S (1) and S (2) in the present embodiment.Be the generative process that example is introduced correlated series with S (0) below, as shown in Figure 2, comprise:
1. suppose
Generate the PSS frequency domain sequence that terminal this locality calculates.
2. place the PSS frequency domain sequence according to the carrier frequency position of agreement regulation, all the other positions all are set to 0.
Concrete, the PSS frequency domain sequence to be placed according to the carrier frequency position of agreement 36.211 regulations, all the other positions all are set to 0.
3. the PSS frequency domain sequence is IFFT (Inverse Fast Flourier Transform, inverse FFT) and obtains the PSS time domain sequences.
4. with the PSS place Symbol position of PSS time domain sequences according to protocol requirement, this time domain PSS sequence is placed into the 3rd Symbol position of special subframe, all the other positions all are made as 0, obtain local sequence PSS_LOCAL (length is 30720).
5. the PSS_LOCAL sequence is carried out low-pass filtering, then 15 times down-sampled, drop to 2048 points, obtain sequence Q.
6. the Q sequence is FFT (Fast Flourier Transform, fast Fourier transform), is obtained S (0).Generate step according to the local sequence of above S (0), generate hypothesis respectively
2 o'clock S (1) and S (2) sequence.S (j) sequence (j=0,1,2) is three groups of local correlated serieses that finally need.
Introduce the detailed process of the searching method of the master sync signal that present embodiment provides below, as shown in Figure 3, may further comprise the steps:
Concrete, terminal is a deflected length with 0.93ms time sampling point (28512 point), gets the time window of 1ms length in turn, and 173280 sampled points are divided into 6 groups of sequence x (i) (i=0,1,2,3,4,5), every group length is 30720 points, also is the time span of 1ms.Terminal is carried out low-pass filtering to x (i) sequence, then 15 times down-sampled, obtain length and be 2048 y (i) (i=0,1,2,3,4,5) sequence.
So that y (0) sequence is treated to example.Terminal utilizes the time-frequency conversion accelerator (for example maple accelerator of freecscale platform) of DSP configuration to y (0) sequence FFT conversion, to obtain sequence z (0).Terminal is done relevant with three groups of local correlated series S (j) sequence z (0) respectively, obtain three groups of correlated results c_freq terminal n ce (j) (j=0,1,2) (being the PSS frequency domain sequence), terminal utilizes time-frequency conversion accelerator (for example maple accelerator of freecscale platform) to do the IFFT conversion respectively three groups of correlated results c_freq terminal n ce (j), obtain three groups of sequence c_time (j) (j=0,1,2) (being the PSS time domain sequences).Terminal is obtained the power of each sampled point among three groups of sequence c_time (j) respectively, and record maximum point power is respectively max_power, and (i, j), the maximum residing sampling optimization of power points is changed to index (0,2).The peak value analogous diagram of supposing the PSS time domain sequences is respectively the sequence peak value diagram of c_time (0), c_time (1) and c_time (2) as shown in Figure 4 from left to right.As can be seen from Figure 4, the power peak maximum of c_time (2) sequence, terminal record max_power (0,2), the residing sampling optimization of max_power (0,2) is changed to index (0,2).
Terminal obtains 3 groups of frequency domain sequences and 3 groups of time domain sequences equally respectively to the processing of all the other 5 groups of y (i) sequences, and respectively record obtain all the other 5 groups of y (i) sequence correspondences max_power (i, j) and the maximum residing sampling point position index of power points (i, j).
6 max_power (i that terminal is finally writing down, j) maximizing is recorded as peak_power in, i and j according to the peak_power correspondence, at index (i, j) find concrete index value in, be recorded as peak_index, write down the seq_index=j of this moment simultaneously, time_index=index.
Need to prove, the method that the embodiment of the invention provides only is to be that 20M, channel are that AWGN+3GPP " EVA-70 ", SNR=10 are that example describes with the system bandwidth, for other scenes, when for example system bandwidth was updated to 20M, this method can be suitable for equally.
In the embodiment of the invention, the data of eating dishes without rice or wine that terminal will read are carried out packet transaction, and the length of sampled point sequence is controlled to be the length of carrying out conversion process that is beneficial to of setting, utilize the time-frequency conversion accelerator that the sampled point sequence is handled, weak point consuming time, efficient height.
Embodiment three
Based on the same or analogous technical conceive of said method embodiment, the embodiment of the invention three provides a kind of search equipment of master sync signal, as shown in Figure 5, comprising:
Grouped element 10 is used for the data of eating dishes without rice or wine that read are divided into groups, and the every group of data of eating dishes without rice or wine is handled and obtained respectively the sampled point sequence of preseting length;
Processing unit 20 is used to utilize the time-frequency conversion accelerator that described sampled point sequence is handled.
As shown in Figure 6, described processing unit 20 comprises:
Frequency domain transform subelement 21 is used to utilize the time-frequency conversion accelerator of Digital Signal Processing DSP configuration that described sampled point sequence is carried out frequency domain transform;
Described preseting length comprises or 1024 points at 2048.
Described grouped element 10 also is used for: when described preseting length is at 2048, the data of eating dishes without rice or wine that read are divided into 6 groups of sampled point sequences that comprise 30720 sampled points respectively, and it is 2048 sampled point sequence that every group of sampled point sequence carried out 15 times of down-sampled length that obtain.Accordingly, as shown in Figure 7, described processing unit 20 comprises:
Frequency domain transform subelement 201 is used to utilize the time-frequency conversion accelerator of DSP configuration that every group of sampled point sequence carried out frequency domain transform;
As shown in Figure 8, this equipment also comprises local sequence generating unit 30, is used for according to preset strategy numbering in the group being set
Value, generate the local PSS frequency domain sequence that calculates; The PSS frequency domain sequence that obtains is done inverse FFT obtain the PSS time domain sequences, obtain local sequence PSS_LOCAL according to this PSS time domain sequences; The PSS_LOCAL sequence is carried out 15 times of down-sampled dropping to, obtain sequence Q; Sequence Q is done fast Fourier transform obtain local correlated series.
In the embodiment of the invention, the data of eating dishes without rice or wine that terminal will read are carried out packet transaction, and the length of sampled point sequence is controlled to be the length of carrying out conversion process that is beneficial to of setting, utilize the time-frequency conversion accelerator that the sampled point sequence is handled, weak point consuming time, efficient height.
Through the above description of the embodiments, those skilled in the art can be well understood to the present invention and can realize by the mode that software adds essential general hardware platform, can certainly pass through hardware, but the former is better execution mode under a lot of situation.Based on such understanding, the part that technical scheme of the present invention contributes to prior art in essence in other words can embody with the form of software product, this computer software product is stored in the storage medium, comprise that some instructions are with so that a computer equipment (can be a personal computer, server, the perhaps network equipment etc.) carry out the described method of each embodiment of the present invention.
It will be appreciated by those skilled in the art that accompanying drawing is the schematic diagram of a preferred embodiment, module in the accompanying drawing or flow process might not be that enforcement the present invention is necessary.
It will be appreciated by those skilled in the art that the module in the device among the embodiment can be distributed in the device of embodiment according to the embodiment description, also can carry out respective change and be arranged in the one or more devices that are different from present embodiment.The module of the foregoing description can be merged into a module, also can further split into a plurality of submodules.
The invention described above embodiment sequence number is not represented the quality of embodiment just to description.
More than disclosed only be several specific embodiment of the present invention, still, the present invention is not limited thereto, any those skilled in the art can think variation all should fall into protection scope of the present invention.
Claims (12)
1. the searching method of a master sync signal is characterized in that, comprising:
The data of eating dishes without rice or wine that terminal will read are divided into groups, and the every group of data of eating dishes without rice or wine are handled and obtained respectively the sampled point sequence of preseting length;
Described terminal utilizes the time-frequency conversion accelerator that described sampled point sequence is handled.
2. the method for claim 1 is characterized in that, described terminal is utilized the time-frequency conversion accelerator that described sampled point sequence is handled to comprise:
Described terminal utilizes the time-frequency conversion accelerator of Digital Signal Processing DSP configuration that described sampled point sequence is carried out frequency domain transform, and the result that frequency domain is changed carries out the relevant master sync signal PSS frequency domain sequence that obtains with local correlated series;
Described terminal is utilized the time-frequency conversion accelerator that described PSS frequency domain sequence is carried out spatial transform and is obtained the PSS time domain sequences.
3. the method for claim 1 is characterized in that, described preseting length comprises or 1024 points at 2048.
4. the method for claim 1 is characterized in that, when described preseting length was at 2048, the data of eating dishes without rice or wine that described terminal will read were divided into groups, and the every group of data of eating dishes without rice or wine are handled and the sampled point sequence that obtains preseting length respectively comprises:
The data of eating dishes without rice or wine that described terminal will read are divided into 6 groups of sampled point sequences that comprise 30720 sampled points respectively, and it is 2048 sampled point sequence that every group of sampled point sequence carried out 15 times of down-sampled length that obtain.
5. method as claimed in claim 4 is characterized in that, described terminal is utilized the time-frequency conversion accelerator that described sampled point sequence is handled to comprise:
Described terminal utilizes the time-frequency conversion accelerator of DSP configuration that every group of sampled point sequence carried out frequency domain transform, and the result that frequency domain changes carried out the relevant PSS frequency domain sequence that obtains with local correlated series, the PSS frequency domain sequence that conversion is obtained carries out spatial transform and obtains the PSS time domain sequences;
Described terminal writes down maximum point power and the maximum residing sampling point position of power points in each PSS time domain sequences, the maximum in each maximum point power is made as peak power, and writes down described peak power corresponding sampling points position.
6. as claim 2 or 5 described methods, it is characterized in that the generating mode of described local correlated series comprises:
According to preset strategy numbering in the group is set
Value, generate the local PSS frequency domain sequence that calculates;
The PSS frequency domain sequence that obtains is done inverse FFT obtain the PSS time domain sequences, obtain local sequence PSS_LOCAL according to this PSS time domain sequences;
The PSS_LOCAL sequence is carried out 15 times of down-sampled dropping to, obtain sequence Q;
Sequence Q is done fast Fourier transform obtain local correlated series.
7. the search equipment of a master sync signal is characterized in that, comprising:
Grouped element is used for the data of eating dishes without rice or wine that read are divided into groups, and the every group of data of eating dishes without rice or wine is handled and obtained respectively the sampled point sequence of preseting length;
Processing unit is used to utilize the time-frequency conversion accelerator that described sampled point sequence is handled.
8. equipment as claimed in claim 7 is characterized in that, described processing unit comprises:
The frequency domain transform subelement is used to utilize the time-frequency conversion accelerator of Digital Signal Processing DSP configuration that described sampled point sequence is carried out frequency domain transform;
The correlator unit is used for the result that frequency domain changes is carried out the relevant master sync signal PSS frequency domain sequence that obtains with local correlated series;
The spatial transform subelement is used to utilize the time-frequency conversion accelerator that described PSS frequency domain sequence is carried out spatial transform and obtains the PSS time domain sequences.
9. equipment as claimed in claim 7 is characterized in that, described preseting length comprises or 1024 points at 2048.
10. equipment as claimed in claim 7, it is characterized in that, described grouped element also is used for: when described preseting length is at 2048, the data of eating dishes without rice or wine that read are divided into 6 groups of sampled point sequences that comprise 30720 sampled points respectively, and it is 2048 sampled point sequence that every group of sampled point sequence carried out 15 times of down-sampled length that obtain.
11. equipment as claimed in claim 10 is characterized in that, described processing unit comprises:
The frequency domain transform subelement is used to utilize the time-frequency conversion accelerator of DSP configuration that every group of sampled point sequence carried out frequency domain transform;
The correlator unit is used for the result that frequency domain changes is carried out the relevant PSS of obtaining frequency domain sequence with local correlated series;
Spatial transform subelement, the PSS frequency domain sequence that is used for that conversion is obtained carry out spatial transform and obtain the PSS time domain sequences;
The record subelement is used for writing down the maximum point power of each PSS time domain sequences and the residing sampling point position of power points of maximum, the maximum in each maximum point power is made as peak power, and writes down described peak power corresponding sampling points position.
12., it is characterized in that as claim 8 or 11 described equipment, also comprise local sequence generating unit, be used for numbering in the group being set according to preset strategy
Value, generate the local PSS frequency domain sequence that calculates; The PSS frequency domain sequence that obtains is done inverse FFT obtain the PSS time domain sequences, obtain local sequence PSS_LOCAL according to this PSS time domain sequences; The PSS_LOCAL sequence is carried out 15 times of down-sampled dropping to, obtain sequence Q; Sequence Q is done fast Fourier transform obtain local correlated series.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103379523A (en) * | 2012-04-19 | 2013-10-30 | 马维尔国际有限公司 | Simple and flexible pss correlator for processing large frequency error |
| CN104660362A (en) * | 2015-02-09 | 2015-05-27 | 大唐移动通信设备有限公司 | Method and device for detecting master synchronizing signal |
| CN112351474A (en) * | 2021-01-08 | 2021-02-09 | 江苏永鼎通信有限公司 | Method, system and storage medium for rapidly searching 5G cell synchronous frequency point |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008092880A1 (en) * | 2007-01-31 | 2008-08-07 | Telefonaktiebolaget Lm Ericsson (Publ) | Cell searching system and method |
| CN101656700A (en) * | 2008-08-19 | 2010-02-24 | 中兴通讯股份有限公司 | Method and device for detecting cyclic prefix type during initial cell search in long-term evolution system |
| CN101834657A (en) * | 2010-04-01 | 2010-09-15 | 复旦大学 | 3GPP (3rd Generation Partnership Project) LET (Long Term Evolution) downlink initial master synchronization detection method |
| CN101883412A (en) * | 2010-07-02 | 2010-11-10 | 北京交通大学 | Initial cell searching method of LTE (Long Term Evolution) under high-speed mobile condition |
-
2010
- 2010-12-23 CN CN2010106203798A patent/CN102075237A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008092880A1 (en) * | 2007-01-31 | 2008-08-07 | Telefonaktiebolaget Lm Ericsson (Publ) | Cell searching system and method |
| CN101656700A (en) * | 2008-08-19 | 2010-02-24 | 中兴通讯股份有限公司 | Method and device for detecting cyclic prefix type during initial cell search in long-term evolution system |
| CN101834657A (en) * | 2010-04-01 | 2010-09-15 | 复旦大学 | 3GPP (3rd Generation Partnership Project) LET (Long Term Evolution) downlink initial master synchronization detection method |
| CN101883412A (en) * | 2010-07-02 | 2010-11-10 | 北京交通大学 | Initial cell searching method of LTE (Long Term Evolution) under high-speed mobile condition |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103379523A (en) * | 2012-04-19 | 2013-10-30 | 马维尔国际有限公司 | Simple and flexible pss correlator for processing large frequency error |
| CN104660362A (en) * | 2015-02-09 | 2015-05-27 | 大唐移动通信设备有限公司 | Method and device for detecting master synchronizing signal |
| CN104660362B (en) * | 2015-02-09 | 2017-09-08 | 大唐移动通信设备有限公司 | The detection method and equipment of a kind of master sync signal |
| CN112351474A (en) * | 2021-01-08 | 2021-02-09 | 江苏永鼎通信有限公司 | Method, system and storage medium for rapidly searching 5G cell synchronous frequency point |
| CN112351474B (en) * | 2021-01-08 | 2021-04-20 | 江苏永鼎通信有限公司 | Method, system and storage medium for rapidly searching 5G cell synchronous frequency point |
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Application publication date: 20110525 |