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Indexed by:期刊论文

Date of Publication:2012-01-01

Journal:International Review on Computers and Software

Included Journals:EI、Scopus

Volume:7

Issue:7

Page Number:3776-3781

ISSN No.:18286003

Abstract:Considering the complexity and performance of algorithms, a rapid capture method of Doppler shift is proposed for a low orbit earth satellite spread spectrum communications system in this paper. The method adopts repeated cycle cumulative theory to improve SNR verdict load of capture loop on the basis of serial slippage correlation capture. The multiplex repeated cumulative loop is used to overcome the symbol sliding, and to realize rapid capture of Doppler shift. Average capture time expression of Doppler shift is derived. The simulation is finally provided and the results show that the proposed capture method, which is compared with the traditional serial capture method, has better performance. ? 2012 Praise Worthy Prize S.r.l.