CN110336584A - Multi-peak CCSK signal motor synchronizing method based on multicycle Conjoint Analysis - Google Patents
Multi-peak CCSK signal motor synchronizing method based on multicycle Conjoint Analysis Download PDFInfo
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- CN110336584A CN110336584A CN201910509938.9A CN201910509938A CN110336584A CN 110336584 A CN110336584 A CN 110336584A CN 201910509938 A CN201910509938 A CN 201910509938A CN 110336584 A CN110336584 A CN 110336584A
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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
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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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Abstract
A kind of multi-peak CCSK signal motor synchronizing method based on multicycle Conjoint Analysis, belongs to communication engineering technical field.Firstly, acquiring the CCSK signal C of K complete cycle1, it is made into related operation with local sequence by after Periodic decomposition, obtains K correlation function.Secondly, taking absolute value to each correlation function, all Q peak value numeration group P are found1,i(1), record position of each maximum value in correlation function；To P1(1)To PK(1)It is averaged note P(1).Again, after postponing a phase difference, the CCSK signal C of K complete cycle is acquired2, the maximum value mean value note P of correlation function absolute value is obtained after repeating(2)；The maximum value mean value P of all correlation function absolute values is obtained after repeating(i), and choose maximum value.Finally, receiver is to receive signal CxOn the basis of, data are received by the period of spreading sequence length, local sequence and reception signal realize sequence synchronization.The present invention can be captured in the case where not depending on pilot channel to multi-peak CCSK signal, and the problem of can be avoided sync fail.
Description
Technical field
The invention belongs to communication engineering technical fields, are related to CCSK signal, in particular to a kind of to be combined based on the multicycle
The multi-peak CCSK signal motor synchronizing method of analysis.
Background technique
The CCSK signal of multi-peak dynamic combined is on the basis of CDMA signal, by by frequency expansion sequence cyclic shift
Mode transmit information.Traditional CCSK signal realizes that signal is synchronous by way of pilot channel is added, but its disadvantage
It is that pilot signal can occupy limited channel resource.And when the cyclic shift digit for encountering flanking sequence is equal, it is unable to complete
It is synchronous.Meanwhile traditional CCSK motor synchronizing means can not be also applied for multi-peak CCSK signal.
Summary of the invention
In view of the problems of the existing technology, the present invention provide it is a kind of based on the CCSK signal of multicycle Conjoint Analysis from same
One step process, it is therefore an objective to not depend on pilot channel and carry out multi-peak CCSK signal detection and improve its accuracy.
In order to reach upper purpose, the technical solution adopted by the present invention are as follows:
A kind of CCSK signal motor synchronizing method based on multicycle Conjoint Analysis, comprising the following steps:
1) the multi-peak CCSK signal for being Q for peak value.Receiver acquires the CCSK signal C of K complete cycle1, and
C is broken down into according to the period1,1(a)、C1,2(a)…C1, K(a), a=1~N, N are code length.
2) receiver is by K C1,i(a) make related operation with local sequence L (a) respectively, obtain K correlation function R1,i
(a), wherein i=1~K.
3) to each correlation function R1,i(a) it takes absolute value, finds all Q peak values therein, be denoted as array P1,i(1),
Middle i=1~K.Each maximum value P is recorded simultaneously1,i(1)Position in correlation function is denoted as position array I1.To P1,i(1)
It is averaged, is denoted as Pi(1), make the corresponding average value of each period.To P1(1)To PK(1)It is averaged, is denoted as P(1).Described
The process of " finding all Q peak values therein " can by Grobus criterion, threshold judgement means, artificial intelligence means or
Gross error detection means carries out.
4) after receiver postpones a phase difference, the CCSK signal C of K complete cycle is acquired2, and such as institute in step 1)
It states, is classified as C2,1(a)、C2,2(a)…C2, K(a), a=1~N, N are code length.When the phase difference is t chip width
Between, t is less than or equal to 0.5.
5) step 2), 3) is repeated, the maximum value mean value of correlation function absolute value is obtained, is denoted as P(2).And record position array
I2；
6) step 4), 5) M times are repeated, until Mt is greater than or equal to N, notes down the maximum value of all correlation function absolute values
Mean value P(i)Referred to as peak value array, while recording all position array Ii, i=1~M.Each peak value array P(i)With position array Ii
All correspond to one group of reception data Ci；
7) P is chosen(i)In maximum value P(x)；
8) receiver is to receive signal CxOn the basis of, data are received by the period of the length of frequency expansion sequence.Local sequence at this time
Column and reception signal realize sequence synchronization.Meanwhile this group of signal CxThe information carried by code phase can be subtracted by N
Remove position array IxIn element obtain.
Beneficial effects of the present invention are as follows:
1) thinking for introducing multicycle joint statistics, solve flanking sequence cyclic shift digit it is equal when, from same
Step algorithm is unable to complete synchronous problem.
2) traditional Self-synchronous algorithm may not apply to multi-peak CCSK signal, and this algorithm can be used in multi-peak CCSK letter
Number.
3) present invention is can be realized in the case where not depending on pilot channel to CCSK signal, including multi-peak CCSK signal
Capture, and when avoiding the identical digit of adjacent periods code loopy moving caused by sync fail.
Detailed description of the invention
Fig. 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).
Emitting signal is containing there are three the multimodal CCSK signal of peak value, code lengths 1023
1) receiver acquires the CCSK signal C of 10 complete cycles1,1(a)、C1,2(a)…C1,10(a), a=1~1023；
2) receiver is by related operation, the signal C that will be connected to1,i(a) be uniformly divided into 10 sections, respectively with local sequence L
(a) make correlation, obtain 10 correlation function Ri(a), wherein i=1~10.
3) each correlation function R is found by Grobus criterioni(a) 3 peak values in take absolute value are denoted as
P1,i(1), wherein i=1~10.Each maximum value P is recorded simultaneously1,i(1)Position in correlation function is denoted as position array
I1.To P1,i(1)It is averaged, is denoted as Pi(1), make the corresponding average value of each period.To P1(1)To PK(1)It is averaged, is denoted as
P(1)；
4) receiver acquires the CCSK signal C of 10 complete cycles2,i(a), wherein i=1~K, the signal with receive before
A periodic signal between and asynchronous periodic relationship, but there are a phase difference, the phases between previous cycle signal
Potential difference is 0.5 chip spaced time；
5) step 2), 3) is repeated, the maximum value mean value of correlation function absolute value is obtained, is denoted as P(2).And record position array
I2；
6) step 4), 5) 2046 times are repeated, the maximum value mean value P of all correlation function absolute values is noted down(i)Referred to as peak value
Array, i=1~2046；
7) P is chosen(i)In maximum value P(x)；
8) receiver is to receive signal CxOn the basis of, data are received by the period of the length of frequency expansion sequence.Local sequence at this time
Column L realizes synchronous, i.e. capturing function completion with sequence C is received.Meanwhile this group of signal CxThe information carried by code phase
It is that N subtracts position array IxIn element.For example, if element in Ix is 123, corresponding information is 2045,2044,
2043。
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 multi-peak CCSK signal motor synchronizing method based on multicycle Conjoint Analysis, which is characterized in that including following step
It is rapid:
1) the multi-peak CCSK signal for being Q for peak value；Receiver acquires the CCSK signal C of K complete cycle1, and according to week
Phase is broken down into C1,1(a)、C1,2(a)…C1, K(a), a=1~N, N are code length；
2) receiver is by K C1,i(a) make related operation with local sequence L (a) respectively, obtain K correlation function R1,i(a),
Middle i=1~K；
3) to each correlation function R1,i(a) it takes absolute value, finds all Q peak values therein, be denoted as array P1,i(1), wherein i
=1~K；Each maximum value P is recorded simultaneously1,i(1)Position in correlation function is denoted as position array I1；To P1,i(1)It makes even
Mean value is denoted as Pi(1), make the corresponding average value of each period；To P1(1)To PK(1)It is averaged, is denoted as P(1)；
4) after receiver postpones a phase difference, the CCSK signal C of K complete cycle is acquired2, and as described in step 1), by it
It is divided into C2,1(a)、C2,2(a)…C2, K(a), a=1~N, N are code length；The phase difference is t chip spaced time, and t is less than
Or it is equal to 0.5；
5) step 2), 3) is repeated, the maximum value mean value of correlation function absolute value is obtained, is denoted as P(2)；And record position array I2；
6) step 4), 5) M times are repeated, until Mt is greater than or equal to N, notes down the maximum value mean value of all correlation function absolute values
P(i)Referred to as peak value array, while recording all position array Ii, i=1~M；Each peak value array P(i)With position array IiIt is all right
Answer one group of reception data Ci；
7) P is chosen(i)In maximum value P(x)；
8) receiver is to receive signal CxOn the basis of, data are received by the period of the length of frequency expansion sequence；It local sequence and connects at this time
The collection of letters number realizes sequence synchronization；Meanwhile this group of signal CxThe information carried by code phase can subtract position by N
Array IxIn element obtain.
2. a kind of multi-peak CCSK signal motor synchronizing method based on multicycle Conjoint Analysis according to claim 1,
It is characterized in that, passes through Grobus criterion, threshold judgement means, artificial intelligence means or gross error inspection in the step 3)
Survey means find peak value.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102790737B (en) * | 2011-05-17 | 2017-11-28 | 中兴通讯股份有限公司 | The synchronous method and device of a kind of system |
| CN108616323A (en) * | 2018-04-09 | 2018-10-02 | 大连理工大学 | CCSK signal improved methods based on the combination of dynamic multimodal |
| CN109286592A (en) * | 2018-10-22 | 2019-01-29 | 大连理工大学 | A kind of CCSK signal acquisition methods not depending on pilot tone |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102790737B (en) * | 2011-05-17 | 2017-11-28 | 中兴通讯股份有限公司 | The synchronous method and device of a kind of system |
| CN108616323A (en) * | 2018-04-09 | 2018-10-02 | 大连理工大学 | CCSK signal improved methods based on the combination of dynamic multimodal |
| CN109286592A (en) * | 2018-10-22 | 2019-01-29 | 大连理工大学 | A kind of CCSK signal acquisition methods not depending on pilot tone |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
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Application publication date: 20191015 |