CN104065397A - Method and device for synchronously capturing pseudo codes in real time - Google Patents
Method and device for synchronously capturing pseudo codes in real time Download PDFInfo
- Publication number
- CN104065397A CN104065397A CN201410304732.XA CN201410304732A CN104065397A CN 104065397 A CN104065397 A CN 104065397A CN 201410304732 A CN201410304732 A CN 201410304732A CN 104065397 A CN104065397 A CN 104065397A
- Authority
- CN
- China
- Prior art keywords
- pseudo
- code
- sequence
- write
- memory ram
- 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
Abstract
The invention discloses a method and a device for synchronously capturing pseudo codes in real time and mainly aims to solve the problem that real-time capture of long-period pseudo codes is difficult in the prior art. The method comprises the following steps: first, a synchronous head is spectrum-spread by adoption of a first pseudo code and a second pseudo code to generate a synchronization sequence, and the synchronization sequence is transmitted; second, a receiving end de-spreads a received signal to obtain segment correlation values and stores the segment correlation values; third, the segment correlation values are sequentially extracted and multiplied by the second pseudo code to obtain part of a correlation value sequence; fourth, modulo operation is performed on the sequence after FFT operation, the peak of the module value is selected and compared with a set threshold, the second pseudo code is successfully captured if the peak is greater than or equal to the threshold, or the method returns to the second step until the second pseudo code is synchronously captured; and fifth, the first half of a superposition value and the second half of the superposition value of the part of correlation value sequence are compared, synchronous capture succeeds if the two are approximately equal, or synchronous capture fails. The method and the device of the invention has the advantages of being capable of capturing long-period pseudo codes in real time, and can be used for real-time synchronous capture in burst communication.
Description
Technical field:
The invention belongs to communication technical field, be particularly related to a kind of catching method of pseudo-code, can be used for receiving terminal real-time synchronization to received signal in spread spectrum communication system and catch, with the success rate of raising system synchronization acquistion under low signal-to-noise ratio, reduce leakage and obtain the probability obtaining with erroneous arrest.
Background technology:
So-called synchronization acquistion, refers to the initial synchronization of receiving system signal.For directly-enlarging system, initial synchronization comprises pseudo-code synchronously and two parts of carrier synchronization.Receiver only, after correctly capturing synchronizing sequence, just can be guaranteed the correct reception of data.
Burst communication belongs to a kind of of covert communications.For burst communication, it is vital catching in real time, and leakage obtains or erroneous arrest obtains all and will cause the loss of the information that receives.
Direct Sequence Spread Spectrum Communication is strong with its antijamming capability, intercept probability is low, the advantage of disguise and good confidentiality, in military communication and commercial communication, is used widely.For Resistant DS Spread Spectrum System, its anti-interference, disguise, low intercepting and capturing all have direct relation with the processing gain of system, and processing gain is relevant with spreading code code length.Spreading code code length is longer, and corresponding processing gain is larger, and the correlated performance of system is better.
Originally, serial search technology is the synchronous capture technology of commonly using the most, has obtained very systematic research.For the shorter situation of pseudo-code period ratio, adopt the mode of serial search, simply effective.But the in the situation that of long in the pseudo-code cycle, if adopt the mode of serial, the time of catching can become very long, this can not meet the demand of communication system fast Acquisition.A lot of scholars to some fast catching method produced keen interest.First R.B.Ward has described estimation of the order fast Acquisition algorithm.But estimation of the order fast Acquisition algorithm cannot be realized catching in real time of long period pseudo-code.
Along with the development of Digital Signal Processing, Fourier transform fft algorithm is also introduced in acquiring pseudo code system, especially in global location gps system, has obtained considerable research and development.At present, using more a kind of synchronization acquistion algorithm is the segmentation filter method in conjunction with fast Fourier transform PMF-FFT based on part matched filtering, the method just can obtain frequency offseting value in searching code phase place, thereby the two-dimensional search of phase place, frequency is become to linear search, greatly reduced capture time.But under current technical conditions, if long single pseudo-code of employing cycle is carried out spread spectrum, receiving terminal is difficult to realization and catches in real time.
Summary of the invention:
The object of the invention is to improve the deficiency of above-mentioned technology, the method and the device that provide a kind of real-time synchronization to catch pseudo-code, to improve synchronization acquistion probability, realize the burst communication of long period Pseudo Code Spread Spectrum.
For achieving the above object, real-time synchronization of the present invention is caught the method for pseudo-code, comprises the steps:
(1) transmitting terminal adopts the first pseudo-code P
1synchronous head information is carried out to spread spectrum one time, adopt the second pseudo-code P
2synchronous head information is carried out to secondary spread spectrum, generate transmitting terminal synchronizing sequence and send, receiving terminal is identical with transmitting terminal pseudo-code used, is respectively the first pseudo-code P
1with the second pseudo-code P
2;
(2) receiving terminal receives signal and adopts the second pseudo-code P
2carry out a despreading:
2a) by the signal sampling point input register receiving, and by this signal sampling point, be labeled as S, by the Parallel Sequence reg of register output and receiving terminal the second pseudo-code P
2make related operation, obtain a segmentation correlation value;
2b) segmentation correlation value is write to first memory RAM
1preserve, if first memory RAM
1write completely, write second memory RAM
2, recursion successively, if k memory RAM
kwrite completely, then from first memory RAM
1restart to have write, k is by the first pseudo-code P
1length determine;
(3) by the sequencing of write memory, extract each memory RAM
i, in 1≤i≤k, the segmentation correlation value of same position, obtains segmentation sequence of correlation values d_corr;
(4) by segmentation sequence of correlation values d_corr and receiving terminal the first pseudo-code P
1multiply each other, obtain part sequence of correlation values p_corr;
(5) to doing Fourier transform FFT concurrent operation after part sequence of correlation values p_corr zero padding, obtain amplitude sequence A, amplitude sequence A is carried out to modulo operation, select the maximum of modulo operation output, be designated as peak;
(6) according to transmitting terminal synchronizing sequence, set thresholding gate, by maximum peak and thresholding gate comparison, if peak>=gate, the output of threshold judgement device " 1 " and manipulative indexing value S, represent the second pseudo-code P
2acquisition success; Otherwise threshold judgement device output " 0 ", represents the second pseudo-code P
2catch unsuccessfully, signal sampling point slides backward one, and repeating step (2)～(6), until the second pseudo-code P
2till synchronization acquistion;
(7) Δ r is relevant with the length of receiving end signal power and the second pseudo-code.The second pseudo-code P
2after synchronization acquistion, by before part sequence of correlation values p_corr
the superposition value r that individual part is worth mutually
1with rear
the superposition value r of individual part correlation
2compare, if r
1=r
2+ Δ r, synchronizing sequence synchronization acquistion success, otherwise synchronizing sequence synchronization acquistion failure.
For achieving the above object, real-time synchronization of the present invention is caught the device of pseudo-code, comprises controller, it is characterized in that, the input of controller is connected with the second pseudo-code P
2trapping module, the output of controller is connected with the first pseudo-code P
1trapping module; The second pseudo-code P
2trapping module to the received signal sampling point carries out the second pseudo-code P
2real-time synchronization is caught, and by the second pseudo-code P
2catch result and be input to controller; Controller is according to the second pseudo-code P
2catch output control the first pseudo-code P
1the startup of trapping module; The first pseudo-code P
1trapping module carries out the real-time synchronization of synchronizing sequence and catches.
The present invention compared with prior art tool has the following advantages:
1) the present invention is owing to adopting a plurality of memory RAM to preserve segmentation correlation value, and part correlation p_corr is done to Fourier transform FFT concurrent operation, obtaining the second pseudo-code P
2in the time of capturing information, solved the first pseudo-code P
1the problem that sync bit is fuzzy, is captured as power and improves, and erroneous arrest obtains and leaks acquisition probability and reduces.
2) the present invention is owing to adopting the first pseudo-code P
1with the second pseudo-code P
2respectively synchronous head information is carried out to spread spectrum and secondary spread spectrum, the real-time synchronization that makes receiving terminal realize long period pseudo-code is caught.
Accompanying drawing explanation
Fig. 1 is that real-time synchronization of the present invention is caught pseudo-coded method flow chart;
Fig. 2 is that real-time synchronization of the present invention is caught pseudo-code device block diagram.
Embodiment
Below in conjunction with accompanying drawing, embodiments of the present invention are described in further details.
With reference to Fig. 1, to synchronization acquistion pseudo-coded method of the present invention, carry out as follows:
Step 1, transmitting terminal generates synchronizing sequence and sends
The transmitting terminal employing cycle is N
1the first pseudo-code P
1synchronous head information is carried out to spread spectrum one time, and the employing cycle is N
2the second pseudo-code P
2synchronous head information is carried out to secondary spread spectrum, and generation length is N
1* N
2transmitting terminal synchronizing sequence and send, receiving terminal is identical with transmitting terminal pseudo-code used, is respectively the first pseudo-code P
1with the second pseudo-code P
2.
Step 2, receiving terminal receives signal also with the second pseudo-code P
2carry out a despreading:
2.1) the signal sampling point receiving is input to length is N to receiving terminal
2register, and this signal sampling point is labeled as to S, this signal sampling point is sealed in and goes out to process, output length is N
2parallel Sequence reg and the second pseudo-code P of receiving terminal
2make related operation, obtain a segmentation correlation value;
2.2) by length, be N
2memory RAM
i, 1≤i≤N
1preserve segmentation correlation value, first segmentation correlation value is write to first memory RAM
1preserve, if first memory RAM
1write completely, write second memory RAM
2, recursion successively, if N
1memory
write completely, then from first memory RAM
1restart to have write.
Step 3, order is extracted segmentation correlation.
By the sequencing of write memory, extract each memory RAM
i, 1≤i≤N
1the segmentation correlation value of middle same position, obtaining length is N
1segmentation sequence of correlation values d_corr.
Step 4, acquisition unit is divided sequence of correlation values p_corr.
By segmentation sequence of correlation values d_corr and receiving terminal the first pseudo-code P
1multiply each other, obtaining length is N
1part sequence of correlation values p_corr.
Step 5, does Fourier transform FFT concurrent operation to part sequence of correlation values p_corr.
According to part matched filtering, in conjunction with fast Fourier transform PMF-FFT, entangle the P that counts of the needed accuracy selection Fourier's parallel transformation of frequency deviation, P>=N
1;
Part sequence of correlation values p_corr is done to P point Fourier transform FFT concurrent operation, and obtaining length is the amplitude sequence A of P, and amplitude sequence A is carried out to modulo operation, and selects the maximum of modulo operation output, is designated as peak.
Step 6, carries out threshold judgement to maximum peak.
According to transmitting terminal synchronizing sequence, set thresholding gate, maximum peak and thresholding gate are compared, if peak>=gate, the output of threshold judgement device " 1 " and manipulative indexing value S, represent the second pseudo-code P
2acquisition success; Otherwise threshold judgement device output " 0 ", represents the second pseudo-code P
2catch unsuccessfully, signal sampling point slides backward one, and repeating step 2～6, until the second pseudo-code P
2till synchronization acquistion.
Step 7, to the first pseudo-code P
1carrying out real-time synchronization catches.
Δ r is relevant with the length of receiving end signal power and the second pseudo-code, Δ r≤α * N
2, α is the constant relevant with receiving end signal power, N
2the second pseudo-code P
2length.
The second pseudo-code P
2after synchronization acquistion, before part sequence of correlation values p_corr
individual part correlation summation, obtains the first superposition value r
1, after part sequence of correlation values p_corr
individual part correlation summation, obtains the second superposition value r
2, by r
1with r
2compare, if r
1=r
2+ Δ r, synchronizing sequence synchronization acquistion success, otherwise synchronizing sequence synchronization acquistion failure.
With reference to Fig. 2, real-time synchronization of the present invention is caught pseudo-code device and is comprised: the second pseudo-code P
2trapping module, controller and the first pseudo-code P
1trapping module.Wherein:
The second described pseudo-code P
2trapping module comprises: register, correlator, memory RAM
i, sequence selector C
1, multiplier, Fourier FFT converter, peak signal selector C
2with threshold judgement device;
This register is preserved the signal sampling point receiving, and this signal sampling point is sealed in and goes out to process, and output length is N
2parallel Sequence reg to correlator, correlator is by this Parallel Sequence reg and the second pseudo-code P
2make related operation, output segmentation correlation value is also kept at memory RAM
iin, during preservation, first segmentation correlation value is write to first memory RAM
1if, first memory RAM
1write completely, write second memory RAM
2, recursion successively, if N
1memory
write completely, then from first memory RAM
1restart to have write;
This sequence selector C
1, by the sequencing of write memory, extract each memory RAM
ithe segmentation correlation value of middle same position, obtains segmentation sequence of correlation values d_corr and exports to multiplier; Multiplier is by this segmentation sequence of correlation values d_corr and the first pseudo-code P
1do multiplying, obtaining length is N
1part sequence of correlation values p_corr and export to Fourier FFT converter; Fourier FFT converter is done Fourier transform FFT concurrent operation after to this part sequence of correlation values p_corr zero padding, and the amplitude sequence A of obtaining is exported to peak signal selector C
2.
This peak signal selector C
2, amplitude sequence A is carried out to modulo operation, select the maximum peak in modulo operation result to export to threshold judgement device; Threshold judgement device compares judgement by this maximum peak and thresholding gate, if peak>=gate, the second pseudo-code P
2synchronization acquistion success, otherwise, the second pseudo-code P
2synchronization acquistion failure; Thresholding gate sets according to transmitting terminal synchronizing sequence.
The first described pseudo-code P
1trapping module comprises: first adder add
1, second adder add
2and comparator;
This first adder add
1, before calculating section sequence of correlation values p_corr
individual part correlation and, obtain the first superposition value r
1and export to comparator;
This second adder add
2, after calculating section sequence of correlation values p_corr
individual part correlation and, obtain the second superposition value r
2and export to comparator;
Described comparator, by first adder add
1the first superposition value r of output
1with second adder add
2the second superposition value r of output
2compare, work as r
1=r
2during+Δ r, synchronizing sequence synchronization acquistion success, otherwise, synchronizing sequence synchronization acquistion failure, Δ r is relevant with the length of receiving end signal power and the second pseudo-code, Δ r≤α * N
2, α is the constant relevant with receiving end signal power, N
2the second pseudo-code P
2length.
The input of controller connects the second pseudo-code P
2trapping module, the output of controller connects the first pseudo-code P
1trapping module; The second pseudo-code P
2trapping module to the received signal sampling point carries out the second pseudo-code P
2real-time synchronization is caught, and by the second pseudo-code P
2catch result and be input to controller; Controller is according to the second pseudo-code P
2catch output control the first pseudo-code P
1the startup of trapping module; The first pseudo-code P
1trapping module carries out the real-time synchronization of synchronizing sequence and catches.
More than describing is only example of the present invention, does not form any limitation of the invention.Obviously for those skilled in the art; after having understood content of the present invention and principle; all may be in the situation that not deviating from the principle of the invention, structure; carry out various corrections and change in form and details, but these corrections based on inventive concept and changing still within claim protection range of the present invention.
Claims (4)
1. real-time synchronization is caught a method for pseudo-code, comprises the steps:
(1) transmitting terminal adopts the first pseudo-code P
1synchronous head information is carried out to spread spectrum one time, adopt the second pseudo-code P
2synchronous head information is carried out to secondary spread spectrum, generate transmitting terminal synchronizing sequence and send, receiving terminal is identical with transmitting terminal pseudo-code used, is respectively the first pseudo-code P
1with the second pseudo-code P
2;
(2) receiving terminal receives signal and adopts the second pseudo-code P
2carry out a despreading:
2a) by the signal sampling point input register receiving, and by this signal sampling point, be labeled as S, by the Parallel Sequence reg of register output and receiving terminal the second pseudo-code P
2make related operation, obtain a segmentation correlation value;
2b) segmentation correlation value is write to first memory RAM
1preserve, if first memory RAM
1write completely, write second memory RAM
2, recursion successively, if k memory RAM
kwrite completely, then from first memory RAM
1restart to have write, k is by the first pseudo-code P
1length determine;
(3) by the sequencing of write memory, extract each memory RAM
i, in 1≤i≤k, the segmentation correlation value of same position, obtains segmentation sequence of correlation values d_corr;
(4) by segmentation sequence of correlation values d_corr and receiving terminal the first pseudo-code P
1multiply each other, obtain part sequence of correlation values p_corr;
(5) to doing Fourier transform FFT concurrent operation after part sequence of correlation values p_corr zero padding, obtain amplitude sequence A, amplitude sequence A is carried out to modulo operation, select the maximum of modulo operation output, be designated as peak;
(6) according to transmitting terminal synchronizing sequence, set thresholding gate, by maximum peak and thresholding gate comparison, if peak>=gate, the output of threshold judgement device " 1 " and manipulative indexing value S, represent the second pseudo-code P
2acquisition success; Otherwise threshold judgement device output " 0 ", represents the second pseudo-code P
2catch unsuccessfully, signal sampling point slides backward one, and repeating step (2)～(6), until the second pseudo-code P
2till synchronization acquistion;
(7) Δ r is relevant with the length of receiving end signal power and the second pseudo-code.The second pseudo-code P
2after synchronization acquistion, by before part sequence of correlation values p_corr
the superposition value r that individual part is worth mutually
1with rear
the superposition value r of individual part correlation
2compare, if r
1=r
2+ Δ r, synchronizing sequence synchronization acquistion success, otherwise synchronizing sequence synchronization acquistion failure.
2. real-time synchronization is caught a pseudo-code device, comprises controller, it is characterized in that, the input of controller is connected with the second pseudo-code P
2trapping module, the output of controller is connected with the first pseudo-code P
1trapping module; The second pseudo-code P
2trapping module to the received signal sampling point carries out the second pseudo-code P
2real-time synchronization is caught, and by the second pseudo-code P
2catch result and be input to controller; Controller is according to the second pseudo-code P
2catch output control the first pseudo-code P
1the startup of trapping module; The first pseudo-code P
1trapping module carries out the real-time synchronization of synchronizing sequence and catches.
3. real-time synchronization is caught pseudo-code device according to claim 2, it is characterized in that: the second pseudo-code P
2trapping module comprises: register, correlator, memory RAM
i, sequence selector C
1, multiplier, Fourier FFT converter, peak signal selector C
2with threshold judgement device;
Described register, preserves the signal sampling point receiving, and this signal sampling point is sealed in and goes out to process, and output Parallel Sequence reg is by correlator and the second pseudo-code P
2make related operation, output segmentation correlation value is kept at RAM
iin, first segmentation correlation value is write to first memory RAM
1preserve, if first memory RAM
1write completely, write second memory RAM
2, recursion successively, if k memory RAM
kwrite completely, then from first memory RAM
1restart to have write;
Described sequence selector C
1, by the sequencing of write memory, extract each memory RAM
ithe segmentation correlation value of middle same position, obtains segmentation sequence of correlation values d_corr and exports to multiplier, and with the first pseudo-code P
1multiply each other, obtain part sequence of correlation values p_corr; Fourier FFT converter is done Fourier transform FFT concurrent operation after to this part sequence of correlation values p_corr zero padding, and the amplitude sequence A of obtaining is exported to peak signal selector C
2;
Described peak signal selector C
2, amplitude sequence A is carried out to modulo operation, select the maximum peak of modulo operation output and export the second pseudo-code P by threshold judgement device
2synchronization acquistion result.
4. real-time synchronization is caught pseudo-code device according to claim 2, it is characterized in that: the first pseudo-code P
1trapping module comprises: first adder add
1, second adder add
2and comparator;
Described first adder add
1, before calculating section sequence of correlation values p_corr
individual part correlation and, obtain the first superposition value r
1and export to comparator;
Described second adder add
2, after calculating section sequence of correlation values p_corr
individual part correlation and, obtain the second superposition value r
2and export to comparator;
Described comparator, for comparing the first superposition value r
1with the second superposition value r
2, work as r
1=r
2during+Δ r, synchronizing sequence synchronization acquistion success, otherwise, synchronizing sequence synchronization acquistion failure, Δ r is relevant with the length of receiving end signal power and the second pseudo-code.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410304732.XA CN104065397B (en) | 2014-06-30 | 2014-06-30 | Real-time synchronization catches method and the device of pseudo-code |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410304732.XA CN104065397B (en) | 2014-06-30 | 2014-06-30 | Real-time synchronization catches method and the device of pseudo-code |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104065397A true CN104065397A (en) | 2014-09-24 |
| CN104065397B CN104065397B (en) | 2016-04-27 |
Family
ID=51552954
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410304732.XA Expired - Fee Related CN104065397B (en) | 2014-06-30 | 2014-06-30 | Real-time synchronization catches method and the device of pseudo-code |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104065397B (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107070496A (en) * | 2017-04-13 | 2017-08-18 | 西安电子科技大学 | Real-time synchronization acquisition equipment and method based on partial matched filter algorithm |
| CN106130603B (en) * | 2016-06-17 | 2018-08-31 | 西安电子科技大学 | High-gain spreads the device and method captured in real time |
| CN108540168A (en) * | 2018-03-09 | 2018-09-14 | 西安电子科技大学 | A kind of device and method that anti-narrowband interference long code spread spectrum synchronization head captures in real time |
| CN109150407A (en) * | 2018-09-25 | 2019-01-04 | 中国科学院国家授时中心 | Multiplex signal pseudo noise code is blind to estimate method, code error correction method and device |
| CN109586760A (en) * | 2018-12-10 | 2019-04-05 | 湖北航天技术研究院总体设计所 | A kind of wireless communications method and system adapting to narrow pulse signal |
| CN109802912A (en) * | 2019-04-08 | 2019-05-24 | 中国人民解放军国防科技大学 | Synchronization method, apparatus, device and storage medium for broadband wireless communication system |
| CN112198536A (en) * | 2020-09-25 | 2021-01-08 | 湖北大学 | GPS L1 multiplexing signal pseudo code extraction equipment and method |
| CN114389738A (en) * | 2022-02-23 | 2022-04-22 | 青岛联众芯云科技有限公司 | Synchronous capturing device and synchronous capturing method |
| CN114826330A (en) * | 2022-04-20 | 2022-07-29 | 青岛鼎信通讯股份有限公司 | Low-voltage transformer area characteristic current communication synchronization method based on m sequence |
| CN115134064A (en) * | 2021-03-27 | 2022-09-30 | 华为技术有限公司 | Data synchronization method and electronic equipment |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008249693A (en) * | 2007-03-02 | 2008-10-16 | Matsushita Electric Ind Co Ltd | Spread spectrum type radar device |
| CN101572563A (en) * | 2009-05-22 | 2009-11-04 | 哈尔滨工程大学 | Method for capturing pseudocode under non-Gaussian channel |
| CN101702628A (en) * | 2009-11-06 | 2010-05-05 | 中国人民解放军国防科学技术大学 | Pseudo code capturing method and capturing device using multiple antennae of direct sequence spread spectrum system |
| CN102412862A (en) * | 2010-09-21 | 2012-04-11 | 中国科学院上海微系统与信息技术研究所 | Direct sequence spread spectrum (DSSS) communication pseudo code capture method used in wireless sensor network (WSN) |
| CN102571136A (en) * | 2012-01-29 | 2012-07-11 | 北京航空航天大学 | Correlated peak detection method of double channel pn code acquisition system |
| CN102647215A (en) * | 2012-04-11 | 2012-08-22 | 哈尔滨工程大学 | Pseudo code iteration acquiring device and acquiring method based on broadband multi-antenna system |
| CN102710283A (en) * | 2012-05-29 | 2012-10-03 | 李晶 | Direct sequence spread spectrum pseudo code capturing method, capturing device and communication system |
| CN103078660A (en) * | 2013-01-06 | 2013-05-01 | 中国电子科技集团公司第十研究所 | Method for reducing capturing time of spreading code in large dynamic range |
| WO2013103620A1 (en) * | 2012-01-02 | 2013-07-11 | Qualcomm Incorporated | Systems and methods for managing on-time of wireless receivers |
-
2014
- 2014-06-30 CN CN201410304732.XA patent/CN104065397B/en not_active Expired - Fee Related
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008249693A (en) * | 2007-03-02 | 2008-10-16 | Matsushita Electric Ind Co Ltd | Spread spectrum type radar device |
| CN101572563A (en) * | 2009-05-22 | 2009-11-04 | 哈尔滨工程大学 | Method for capturing pseudocode under non-Gaussian channel |
| CN101702628A (en) * | 2009-11-06 | 2010-05-05 | 中国人民解放军国防科学技术大学 | Pseudo code capturing method and capturing device using multiple antennae of direct sequence spread spectrum system |
| CN102412862A (en) * | 2010-09-21 | 2012-04-11 | 中国科学院上海微系统与信息技术研究所 | Direct sequence spread spectrum (DSSS) communication pseudo code capture method used in wireless sensor network (WSN) |
| WO2013103620A1 (en) * | 2012-01-02 | 2013-07-11 | Qualcomm Incorporated | Systems and methods for managing on-time of wireless receivers |
| CN102571136A (en) * | 2012-01-29 | 2012-07-11 | 北京航空航天大学 | Correlated peak detection method of double channel pn code acquisition system |
| CN102647215A (en) * | 2012-04-11 | 2012-08-22 | 哈尔滨工程大学 | Pseudo code iteration acquiring device and acquiring method based on broadband multi-antenna system |
| CN102710283A (en) * | 2012-05-29 | 2012-10-03 | 李晶 | Direct sequence spread spectrum pseudo code capturing method, capturing device and communication system |
| CN103078660A (en) * | 2013-01-06 | 2013-05-01 | 中国电子科技集团公司第十研究所 | Method for reducing capturing time of spreading code in large dynamic range |
Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106130603B (en) * | 2016-06-17 | 2018-08-31 | 西安电子科技大学 | High-gain spreads the device and method captured in real time |
| CN107070496A (en) * | 2017-04-13 | 2017-08-18 | 西安电子科技大学 | Real-time synchronization acquisition equipment and method based on partial matched filter algorithm |
| CN107070496B (en) * | 2017-04-13 | 2019-03-26 | 西安电子科技大学 | Real-time synchronization acquisition equipment and method based on partial matched filter algorithm |
| CN108540168A (en) * | 2018-03-09 | 2018-09-14 | 西安电子科技大学 | A kind of device and method that anti-narrowband interference long code spread spectrum synchronization head captures in real time |
| CN109150407A (en) * | 2018-09-25 | 2019-01-04 | 中国科学院国家授时中心 | Multiplex signal pseudo noise code is blind to estimate method, code error correction method and device |
| CN109150407B (en) * | 2018-09-25 | 2021-12-17 | 中国科学院国家授时中心 | Multiplexing signal pseudo-random code blind estimation method, error code correction method and device |
| CN109586760B (en) * | 2018-12-10 | 2021-04-27 | 湖北航天技术研究院总体设计所 | Wireless communication method and system suitable for narrow pulse signals |
| CN109586760A (en) * | 2018-12-10 | 2019-04-05 | 湖北航天技术研究院总体设计所 | A kind of wireless communications method and system adapting to narrow pulse signal |
| CN109802912A (en) * | 2019-04-08 | 2019-05-24 | 中国人民解放军国防科技大学 | Synchronization method, apparatus, device and storage medium for broadband wireless communication system |
| CN112198536A (en) * | 2020-09-25 | 2021-01-08 | 湖北大学 | GPS L1 multiplexing signal pseudo code extraction equipment and method |
| CN112198536B (en) * | 2020-09-25 | 2022-08-09 | 湖北大学 | GPS L1 multiplexing signal pseudo code extraction equipment and method |
| CN115134064A (en) * | 2021-03-27 | 2022-09-30 | 华为技术有限公司 | Data synchronization method and electronic equipment |
| WO2022206496A1 (en) * | 2021-03-27 | 2022-10-06 | 华为技术有限公司 | Data synchronization method and electronic device |
| CN115134064B (en) * | 2021-03-27 | 2024-01-16 | 华为技术有限公司 | Data synchronization method and electronic equipment |
| CN114389738A (en) * | 2022-02-23 | 2022-04-22 | 青岛联众芯云科技有限公司 | Synchronous capturing device and synchronous capturing method |
| CN114389738B (en) * | 2022-02-23 | 2023-09-15 | 青岛联众芯云科技有限公司 | Synchronous capturing device and synchronous capturing method |
| CN114826330A (en) * | 2022-04-20 | 2022-07-29 | 青岛鼎信通讯股份有限公司 | Low-voltage transformer area characteristic current communication synchronization method based on m sequence |
| CN114826330B (en) * | 2022-04-20 | 2023-09-22 | 青岛鼎信通讯股份有限公司 | Low-voltage station area characteristic current communication synchronization method based on m sequence |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104065397B (en) | 2016-04-27 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104065397B (en) | Real-time synchronization catches method and the device of pseudo-code | |
| CN105790788B (en) | A kind of pseudo-code of direct expansion msk signal-Doppler's joint acquisition method | |
| CN105553507A (en) | Full coherence accumulation time-frequency domain parallel capturing method based on FFT | |
| CN103078660B (en) | Method for reducing capturing time of spreading code in large dynamic range | |
| CN105553506B (en) | A kind of quick capturing method and device of long code spread-spectrum signal | |
| CN108401581B (en) | A kind of PN code quick capturing methods in satellite spectrum-spread communication system | |
| CN105141340A (en) | Full-digital receiving method of direct spread MSK signal | |
| CN112910499B (en) | Spread spectrum signal accurate acquisition system | |
| CN105607096A (en) | Dual-satellite time difference and frequency difference positioning method and positioning device | |
| CN108169772B (en) | Satellite signal capturing method of windowed FFT (fast Fourier transform) | |
| CN109088838A (en) | Pseudo-code-Doppler's quick capturing method of direct expansion dpsk signal under a kind of high dynamic | |
| CN103941269A (en) | PN code capturing method used for satellite navigation system | |
| CN102798871B (en) | Pseudo code capturing method and device based on pseudo code reconstruction | |
| CN108011651A (en) | A kind of demodulating equipment and method for the short burst spread-spectrum modulation technique of satellite channel | |
| CN105871530B (en) | A kind of timing tracking method of anti-high dynamic frequency deviation variation | |
| CN111934710A (en) | High-dynamic spread spectrum signal rapid acquisition algorithm | |
| CN107370705A (en) | FFT optimization method in the capture of high dynamic weakly continuous phase modulated signal | |
| CN103384401B (en) | Based on synchronization acquiring device and the method thereof of first in first out structure | |
| CN104765054A (en) | GNSS pseudo-random code capturing method and device | |
| CN107070496B (en) | Real-time synchronization acquisition equipment and method based on partial matched filter algorithm | |
| CN101753204B (en) | Spread spectrum acquisition method in multi-path dense environment | |
| CN102323604B (en) | Adder and correlator integrated device | |
| CN102790628B (en) | Acquisition method and device for multipath code phase based on broadcast positioning signal | |
| CN114217329A (en) | Short code capturing method based on serial search | |
| CN106130603B (en) | High-gain spreads the device and method captured in real time |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160427 Termination date: 20210630 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |