Efficient Differential Coherent Accumulation Algorithm for Weak GPS Signal Bit Synchronization

Author

Xinshan Li ; Wei Guo

Author_Institution

Nat. Key Lab. of Sci. & Technol. on Commun., Univ. of Electron. Sci. & Technol. of China, Chengdu, China

Volume

17

Issue

5

fYear

2013

fDate

May-13

Firstpage

936

Lastpage

939

Abstract

An efficient differential coherent accumulation algorithm for weak GPS signal bit synchronization is presented. With this algorithm, every two successive 1ms coherent integration values are processed with the differential coherent first, whereafter these differential coherent values are accumulated according to 20 navigation data bit boundary candidates as the decision variable. The navigation data bit boundary candidate corresponding to the minimum of these decision variables is determined as the navigation data bit boundary position to achieve bit synchronization. Compared with previous differential coherent accumulation algorithm, this algorithm shows a theoretical reduction in computational load by approximately sixfold.

Keywords

Global Positioning System; signal processing; coherent integration values; data bit boundary position navigation; decision variable; decision variables; efficient differential coherent accumulation algorithm; weak GPS signal bit synchronization; Approximation algorithms; Correlators; Global Positioning System; Receivers; Synchronization; Bit synchronization; GPS; differential coherent accumulation; weak signal;

fLanguage

English

Journal_Title

Communications Letters, IEEE

Publisher

ieee

ISSN

1089-7798

Type

jour

DOI

10.1109/LCOMM.2013.031913.130267

Filename

6486535