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Synchronization method of multi-peak code shift keying signal based on peak delay difference

A technology of signal synchronization and poor delay, applied in the field of spread spectrum signal synchronization modulated by cyclic code shift keying technology, can solve the problems of low efficiency and long time, and achieve high synchronization efficiency, reduced time, and short realization time. Effect

Active Publication Date: 2021-10-22
DALIAN UNIV OF TECH
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The implementation process takes a long time and the efficiency is low

Method used

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Embodiment Construction

[0031] The specific implementation manner of the present invention will be described in detail below in conjunction with the technical solutions.

[0032] A multi-peak code shift keying signal synchronization method based on peak delay difference, including two parts: a characteristic test process and a signal synchronization process, and the specific steps are:

[0033] Characteristic testing process:

[0034] (1) Set code phase offset a=1.

[0035] (2) From a random bit flip edge, intercept two-bit CCSK signal or multi-peak CCSK signal as the received signal, denoted as S(i), where the value of i is 1-8184 (the sampling number of one bit of CCSK signal for 4092).

[0036] (3) Intercept a section of the received signal S(j+a-1) and perform a correlation operation with the local signal L(j) to obtain the correlation function R (a) (j), where the value of j is 1-4092.

[0037] (4) find R (a) The element with the largest absolute value in , and record its absolute value as ...

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Abstract

The invention provides a multi-peak code shift keying signal synchronization method based on peak delay difference, which belongs to the technical field of wireless communication and includes two parts: a characteristic test process and a signal synchronization process. Firstly, the fitting relational expressions of x and y are obtained through the characteristic test, and then the signal synchronization is carried out according to the fitting relational expressions. Compared with the synchronization technology of the traditional CCSK signal (or multi-peak CCSK signal), the present invention has the advantage that only several times of correlation operations between the received signal and the local PN sequence can realize the synchronization of the received signal and the local signal, greatly reducing the synchronization process. time. The realization time of the synchronization process is short and the synchronization efficiency is high.

Description

technical field [0001] The invention belongs to the technical field of wireless communication and relates to the synchronization of spread spectrum signals, in particular to a method for synchronizing spread spectrum signals modulated by Cyclic Code Shift Keying (CCSK) technology. Background technique [0002] With the rapid development of spread spectrum communication, the synchronization technology of spread spectrum signals has also become diversified. In the document "Multi-Peak CCSK Signal Self-Synchronization Method Based on Multi-Cycle Joint Analysis", if you want to realize the synchronization of the spread-spectrum signal modulated by traditional CCSK technology, you need to traverse a complete cycle of the local pseudo-random (Pseudo-Noise) sequence, a total of Do N correlation operations (N is the number of samples per period of the pseudo-random sequence). The implementation process takes a long time and the efficiency is low. [0003] However, in the present i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B1/7073H04B1/7075H04L27/26
CPCH04B1/7073H04B1/7075H04L27/2655H04L27/2695
Inventor 邹德岳李欣玥刘鑫赵楠
Owner DALIAN UNIV OF TECH