Weak GPS Signal Acquisition Algorithm Based on Chaotic Oscillator

被引:10
作者
Huang, Pengda [1 ]
Pi, Yiming [1 ]
Zhao, Zhiqin [1 ]
机构
[1] Univ Elect Sci & Technol China, Sch Elect Engn, Lab 701 4, Chengdu 611731, Peoples R China
基金
国家高技术研究发展计划(863计划);
关键词
Information Technology; Quantum Information; Full Article; Chaotic Oscillator; Signal Acquisition;
D O I
10.1155/2009/862618
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
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. Copyright (C) 2009 Pengda Huang et al.
引用
收藏
页数:6
相关论文
共 12 条
[1]  
Akos D.M., 2000, P GPS 2000 SESSION D, P784
[2]  
ELDERSBOLL H, 2004, P IEEE INT S SPREAD, P731
[3]   NON-LINEAR OSCILLATOR WITH A STRANGE ATTRACTOR [J].
HOLMES, P .
PHILOSOPHICAL TRANSACTIONS OF THE ROYAL SOCIETY A-MATHEMATICAL PHYSICAL AND ENGINEERING SCIENCES, 1979, 292 (1394) :419-448
[4]  
LACHAPELL G, 2003, P INT TECHN M I NAV, P1
[5]   Chaotic oscillator and other techniques for detection of weak signals [J].
Le, B ;
Liu, Z ;
Gu, TX .
IEICE TRANSACTIONS ON FUNDAMENTALS OF ELECTRONICS COMMUNICATIONS AND COMPUTER SCIENCES, 2005, E88A (10) :2699-2701
[6]  
LIU D, 2005, P 40 IAS ANN M IND A, V3, P2054
[7]  
Psiaki M.L., 2001, P ION GPS 2001, P2838
[8]   BEHAVIORAL-INHIBITION IN CHILDHOOD - A RISK FACTOR FOR ANXIETY DISORDERS [J].
ROSENBAUM, JF ;
BIEDERMAN, J ;
BOLDUCMURPHY, EA ;
FARAONE, SV ;
CHALOFF, J ;
HIRSHFELD, DR ;
KAGAN, J .
HARVARD REVIEW OF PSYCHIATRY, 1993, 1 (01) :2-16
[9]  
Spilker J.J., 1977, DIGITAL COMMUNICATIO
[10]  
Strogatz S. H., 2000, Studies in nonlinearity