CN109286592A - A kind of CCSK signal acquisition methods not depending on pilot tone - Google Patents
A kind of CCSK signal acquisition methods not depending on pilot tone Download PDFInfo
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- CN109286592A CN109286592A CN201811226871.XA CN201811226871A CN109286592A CN 109286592 A CN109286592 A CN 109286592A CN 201811226871 A CN201811226871 A CN 201811226871A CN 109286592 A CN109286592 A CN 109286592A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/26—Systems using multi-frequency codes
- H04L27/2601—Multicarrier modulation systems
- H04L27/2647—Arrangements specific to the receiver only
- H04L27/2655—Synchronisation arrangements
- H04L27/2662—Symbol synchronisation
- H04L27/2663—Coarse synchronisation, e.g. by correlation
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/69—Spread spectrum techniques
- H04B1/707—Spread spectrum techniques using direct sequence modulation
- H04B1/7073—Synchronisation aspects
- H04B1/7075—Synchronisation aspects with code phase acquisition
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- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Synchronisation In Digital Transmission Systems (AREA)
Abstract
A kind of CCSK signal acquisition methods not depending on pilot tone, belong to communication engineering technical field.Receiver, which has multiple groups, in this method receives the parallel correlation of data progress dephased complete cycle, obtains peak value array.Reception signal corresponding to maximum value in peak value array is both the signal with local sequence synchronization.The invention has the advantages that realizing the capture to CCSK signal in the case where not depending on pilot channel.
Description
Technical field
The invention belongs to communication engineering technical fields, be related to CCSK signal, are related specifically to a kind of pilot tone that do not depend on
CCSK signal acquisition methods.
Background technique
CCSK signal, the CCSK signal including multi-peak dynamic combined are all on the basis of CDMA signal, by that will expand
The mode of frequency sequence cyclic shift transmits information.Traditional CDMA signal detection means are complete simultaneously by way of matched filtering
At the capture of signal.But since the sequence of pseudo-random sequence in CCSK signal is changed, net synchronization capability is destroyed.Therefore,
CDMA signal detection means are unable to complete capturing function.Traditional CCSK signal realizes letter by way of pilot channel is added
Number synchronization, but the disadvantage is that pilot signal can occupy limited channel resource.
Summary of the invention
In view of the problems of the existing technology, the present invention provides one kind and does not depend on pilot channel and carry out CCSK signal detection
Method.
The technical solution adopted by the invention is as follows:
A kind of CCSK signal acquisition methods not depending on pilot tone, receiver has dephased complete cycle to multiple groups in this method
Phase receives data and carries out parallel correlation, obtains peak value array.Reception signal corresponding to maximum value in peak value array, be both with
The signal of local sequence synchronization.Specific step is as follows:
(1) receiver acquires the CCSK signal C of a complete cycle1(a), a=1~N, N are code length.
(2) receiver is by parallel related operation, the signal C that will be connected to1(a) related to local sequence L (a) work, it obtains
To correlation function R (a).Correlation function R (a) is taken absolute value, maximum value therein is found and is denoted as P (1).
(3) receiver acquires the CCSK signal C of a complete cycle2(a), the signal and the periodic signal received before
Between and asynchronous periodic relationship, but there are a phase differences between previous cycle signal.The phase difference is t
Chip spaced time, t are less than or equal to 0.5 chip.
(4) step (2), (3) are repeated, the maximum value of correlation function absolute value is obtained, is denoted as P (2).
(5) step (4), (5) are repeated M times, until M*t > N, notes down the maximum value P (i) of all correlation function absolute values
Referred to as peak value array, i=1~M.Peak value array is that receiver receives data progress parallel to multiple groups tool dephased complete cycle
Correlation receives the correlation function that data are obtained with local sequence related operation to each cycle and takes absolute value, the maximum of the absolute value
Value is then an element in peak value array.Multiple groups, which have, receives data dephased complete cycle, and first phase covers completely
One code sequence period.
(6) the maximum value P (x) in P (i) is chosen；
(7) receiver is to receive signal Cx(a) on the basis of, data are received by the period of the length of frequency expansion sequence.At this time originally
Ground sequence L realizes synchronous, i.e. capturing function completion with sequence C is received.
The invention has the advantages that realizing the capture to CCSK signal in the case where not depending on pilot channel.
Detailed description of the invention
Attached drawing 1 is signal processing flow figure.
Specific embodiment
A specific embodiment of the invention is described in detail below in conjunction with technical solution (and attached drawing).
For the system in a 1ms long period of pseudo-random sequence 1023.Technical solution of the present invention is carried out with following steps.
(1) the CCSK signal C1 (a) of receiver acquisition 1ms, a=1~1023；
(2) receiver passes through parallel related operation, and the signal C1 (a) being connected to is related to local sequence L (a) work, obtains
To correlation function R (a).
(3) correlation function R (a) is taken absolute value, finds maximum value therein and is denoted as P (1)；
(4) receiver acquires the CCSK signal C2 (a) of a complete cycle, the signal and the periodic signal received before
Between and asynchronous periodic relationship, but there are the phase differences of a 0.5/1023ms between previous cycle signal；
(5) step (2), (3) are repeated, the maximum value of correlation function absolute value is obtained, is denoted as P (2)；
(6) step (4), (5) 2046 times are repeated, the maximum value P (i) for noting down all correlation function absolute values is known as peak value
Array, i=1~2046；
(7) the maximum value P (x) in P (i) is chosen；
(8) receiver is to receive signal Cx(a) on the basis of, data are received by the period of the length of frequency expansion sequence.At this time originally
Ground sequence L realizes synchronous, i.e. capturing function completion with sequence C is received.
Embodiment described above only expresses embodiments of the present invention, and but it cannot be understood as to the invention patent
Range limitation, it is noted that for those skilled in the art, without departing from the inventive concept of the premise, also
Several modifications and improvements can be made, these are all belonged to the scope of protection of the present invention.
Claims (2)
1. a kind of CCSK signal acquisition methods for not depending on pilot tone, which is characterized in that receiver has phase to multiple groups in this method
It receives data the complete cycle of potential difference and carries out parallel correlation, obtain peak value array；Reception corresponding to maximum value in peak value array
Signal is both the signal with local sequence synchronization；Specific step is as follows:
(1) receiver acquires the CCSK signal C of a complete cycle1(a), a=1~N, N are code length；
(2) receiver is by parallel related operation, the signal C that will be connected to1(a) related to local sequence L (a) work, obtain correlation
Function R (a)；Correlation function R (a) is taken absolute value, maximum value therein is found and is denoted as P (1)；
(3) receiver acquires the CCSK signal C of a complete cycle2(a), between the signal and the periodic signal received before
And asynchronous periodic relationship, but there are a phase differences between previous cycle signal；
(4) step (2), (3) are repeated, the maximum value of correlation function absolute value is obtained, is denoted as P (2)；
(5) step (4), (5) are repeated M times, until M*t > N, the maximum value P (i) for noting down all correlation function absolute values is known as
Peak value array, i=1~M；The peak value array is that receiver receives data progress simultaneously to multiple groups tool dephased complete cycle
Row is related, receives the correlation function that data are obtained with local sequence related operation to each cycle and takes absolute value, the absolute value is most
Big value is then an element in peak value array；Multiple groups, which have, receives data dephased complete cycle, and first phase covers completely
A code sequence period；
(6) the maximum value P (x) in P (i) is chosen；
(7) receiver is to receive signal Cx(a) on the basis of, data are received by the period of the length of frequency expansion sequence；Local sequence at this time
L is synchronous with sequence C realization is received, and capturing function is completed.
2. a kind of CCSK signal acquisition methods for not depending on pilot tone according to claim 1, which is characterized in that the phase
Potential difference is that t is less than or equal to 0.5 chip.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811226871.XA CN109286592A (en) | 2018-10-22 | 2018-10-22 | A kind of CCSK signal acquisition methods not depending on pilot tone |
| PCT/CN2019/085440 WO2020082715A1 (en) | 2018-10-22 | 2019-05-05 | Ccsk signal capturing method independent of pilot frequency |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811226871.XA CN109286592A (en) | 2018-10-22 | 2018-10-22 | A kind of CCSK signal acquisition methods not depending on pilot tone |
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| Publication Number | Publication Date |
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| CN109286592A true CN109286592A (en) | 2019-01-29 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201811226871.XA Withdrawn CN109286592A (en) | 2018-10-22 | 2018-10-22 | A kind of CCSK signal acquisition methods not depending on pilot tone |
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| CN (1) | CN109286592A (en) |
| WO (1) | WO2020082715A1 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110336584A (en) * | 2019-06-13 | 2019-10-15 | 大连理工大学 | Multi-peak CCSK signal motor synchronizing method based on multicycle Conjoint Analysis |
| CN110943747A (en) * | 2019-11-20 | 2020-03-31 | 北京无线电计量测试研究所 | Broadband microwave signal capturing method and system |
| WO2020082715A1 (en) * | 2018-10-22 | 2020-04-30 | 大连理工大学 | Ccsk signal capturing method independent of pilot frequency |
| CN111917435A (en) * | 2020-01-07 | 2020-11-10 | 大连理工大学 | Multimodal code shift keying signal synchronization method based on peak delay difference |
| CN116405055A (en) * | 2023-06-07 | 2023-07-07 | 中国人民解放军国防科技大学 | Spread spectrum communication method, system and related device |
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- 2018-10-22 CN CN201811226871.XA patent/CN109286592A/en not_active Withdrawn
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2019
- 2019-05-05 WO PCT/CN2019/085440 patent/WO2020082715A1/en active Application Filing
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020082715A1 (en) * | 2018-10-22 | 2020-04-30 | 大连理工大学 | Ccsk signal capturing method independent of pilot frequency |
| CN110336584A (en) * | 2019-06-13 | 2019-10-15 | 大连理工大学 | Multi-peak CCSK signal motor synchronizing method based on multicycle Conjoint Analysis |
| CN110943747A (en) * | 2019-11-20 | 2020-03-31 | 北京无线电计量测试研究所 | Broadband microwave signal capturing method and system |
| CN111917435A (en) * | 2020-01-07 | 2020-11-10 | 大连理工大学 | Multimodal code shift keying signal synchronization method based on peak delay difference |
| CN116405055A (en) * | 2023-06-07 | 2023-07-07 | 中国人民解放军国防科技大学 | Spread spectrum communication method, system and related device |
| CN116405055B (en) * | 2023-06-07 | 2023-08-29 | 中国人民解放军国防科技大学 | Spread spectrum communication method, system and related device |
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| WO2020082715A1 (en) | 2020-04-30 |
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Application publication date: 20190129 |