Open Access

Weak GPS Signal Acquisition Algorithm Based on Chaotic Oscillator

EURASIP Journal on Advances in Signal Processing20092009:862618

Received: 21 November 2008

Accepted: 16 September 2009

Published: 30 September 2009


To detect weak Global Position System (GPS) signal indoors, various high-sensitivity detection algorithms have been proposed. However, a common tradeoff between high-sensitivity and computation burden impedes development of high sensitivity GPS receiver. As another strategy, chaotic oscillator, sensitive to periodic signal and inert to noise, possesses huge advantage in weak signal acquisition. In this paper chaotic oscillator is employed in weak GPS signal acquisition. With numerical indication of Lyapunov exponents (LEs), chaotic oscillator can achieve acquisition in extremely weak GPS signal. Compared with conventional algorithm, chaotic oscillator consumes less acquisition time and is capable of detecting weak GPS signal. In the final section of paper, results from computer simulation illustrate that chaotic oscillator algorithm can acquire GPS signal at 48 dB/2MHz SNR.

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Authors’ Affiliations

701-4 Laboratory School of Electronic Engineering, Electronic Science and Technology University of China


© Pengda Huang et al. 2009

This article is published under license to BioMed Central Ltd. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.