A Novel Algorithm for Long Pseudo-Code Acquisition in Spread Spectrum Communication System

Chun Hui Ren; Zhong Quan He

doi:10.4028/www.scientific.net/AMM.610.905

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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vol. 610A Novel Algorithm for Long Pseudo-Code Acquisition...

A Novel Algorithm for Long Pseudo-Code Acquisition in Spread Spectrum Communication System

Abstract:

The capture of long Pseudo-Code code is the most important technology in spread spectrum system. we use XFAST,AVERAGE to solve this problem in old days. A new algorithm is proposed which based on the time domain samples and binary search according the autocorrelation of the Pseudo-Code (PN code) and improve the speed of the capture of long Pseudo-Code code in spread spectrum system. Firstly, received spread spectrum signal's simple rate is reduced to a quarter of the chip rate and determine with a specific method, then divide the local PN code into four parts and accumulated to a new sequence. finally, the synchronous pseudo-code is captured with the correlation of the two new reference sequences. Compared with conventional methods such as XFAST, capture time and precision are improved.

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Periodical:

Applied Mechanics and Materials (Volume 610)

Pages:

905-909

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.610.905

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Online since:

August 2014

Authors:

Chun Hui Ren, Zhong Quan He

Keywords:

Binary Search, DSSS, Pre-Judgment, Pseudo-Code

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