基于平均相关和差分相干累积的微弱GPS C/A码信号精密捕获算法

doi:10.11959/j.issn.1000-436x.2015092

Abstract

Abstract:

Aiming at the problem of global positioning system (GPS) C/A code acquisition under weak signal conditions,a code acquisition algorithm based on averaging correlation and differential coherent accumulation was proposed.First,the strength ratio of the largest peak to the second largest peak was adopted as the decision variable; optimum decision thresholds can be obtained through the simulation probability of false alarm of all kinds of acquisition algorithms.Second,by setting the decision threshold,the probabilities of detection of different Doppler frequency deviation and signal to noise ratio (SNR) were obtained.Finally,acquisition sensitivities of the code acquisition algorithm based on the differen-tial coherent accumulation were compared with those of the code acquisition algorithm based on coherent and noncoher-ent accumulation and the code acquisition algorithm based on noncoherent accumulation.Simulation results show that acquisition sensitivities of the code acquisition algorithm based on the differential coherent accumulation are improved by about 2.0 dB than those of the other two acquisition algorithms under the same receiving data length condition.

Key words: FFT, averaging correlation, differential coherent accumulation, weak GPS signal, code acquisition, threshold setting

IXin-shan L,UOWei G. Fine C/A code acquisition algorithm for weak GPS signal based on averaging correlation and differential coherent accumulation[J]. Journal on Communications, 2015, 36(5): 112-119.

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References 18

[1]	PSIAKI M L . Block acquisition of weak GPS signals in a software receiver[A]. ION GPS 200[C]. Salt Lake City,UT, 2001. 2838-2851.
[2]	HE Z , PETOVELLO M , LACHAPELLE G . Improved velocity estimation with high-sensitivity receivers in indoor environments[A]. ION GPS 2012[C]. Nashville,TN, 2012. 1004-1016.
[3]	SHEN Y J , ZHAO M J , ZHONG J , et al. Design of acquisition algorithm based on a novel detector for weak GNSS signals[A]. 2011 6th International ICST Conference on Communications and Networking in China[C]. Harbin,China, 2011. 384-389.
[4]	PARKINSON B W , SPILKER J J . Global Positioning System:Theory and Applications Vol I[M]. Washington: American Institute of Aeronautics and Astronautics,Inc, 1996.
[5]	MAO W L , CHEN A B . New code delay compensation algorithm for weak GPS signal acquisition[J]. International Joural of Electronics and Communications (AEü), 2009,63(8): 665-677.
[6]	LECLERE J , BOTTERON C , FARINE P . Improving the performance of the FFT-based parallel code-phase search acquisition of GNSS signals by decomposition of the circular correlation[A]. ION GNSS 2012[C]. Nashville,TN, 2012. 1406-1416.
[7]	STARZYK J A , ZHU Z . Averaging correlation for C/A Code acquisition and tracking in frequency domain[A]. ION GNSS 2012[C]. Dayton,Ohio, 2001. 905-908.
[8]	SOUDAN M , GEIGER B C . Averaging correlation for C/A Code acquisition and tracking in frequency domain[A]. ION GNSS 2010[C]. Portland,OR, 2010. 3284-3289.
[9]	TSUI J B . Fundamentals of Global Positioning System Receivers - A Software Approach[M]. New Jersey: John Wiley ＆ Sons,Inc, 2005.
[10]	李新山，郭伟，谢先斌．一种高动态、弱信号GPS比特同步方法[J]．电子与信息学报， 2011,33(10):2521-2525. LI X S , GUO W , XIE X B . A GPS bit synchronization method for high-dynamic and weak signal[J]. Journal of Electronics ＆ Information Technology, 2011,33(10):2521-2525.
[11]	LI X S , GUO W . Efficient differential coherent accumulation algorithm for weak GPS signal bit synchronization[J]. IEEE Communications Letters, 2013,17(5): 936-939.
[12]	唐斌，董绪荣．基于简易差分相干积累的高灵敏度 GPS 软件接收机捕获算法[J]．信号处理， 2009,25(5):832-836. TANG B , DONG X R . A new high-sensitivity acquisition method of software GPS receiver based on ingenious differentially coherent integration[J]. Signal Processing, 2009,25(5):832-836.
[13]	SHIN O , LEE K B . Differentially coherent combining for double-dwell code acquisition in DS-CDMA systems[J]. IEEE Transactions on Communications, 2003,51(7): 1046-1050.
[14]	GEIGER B C , VOGEL C , SOUDAN M . Comparison between ratio detection and threshold comparison for GNSS acquisition[J]. IEEE Transactions on Aerospace and Electronic Systems. 2012,48(2): 1772-1779.
[15]	JUNG J . Implementation of correlation power peak ratio based signal detection method[A]. ION GPS 2004[C]. Long Beach,CA, 2004. 486-490.
[16]	SCHMID A , NEUBUER A . Performance evaluation of differential correlation for single shot measurement positioning[A]. ION GNSS 2004[C]. Long Beach,CA, 2004. 1998-2009.
[17]	KAPLAN E D , HEGARTY C J . Understanding GPS:Principles and Applications[M]. Norwood,MA: Artech House, 2006.
[18]	OLOFSSON P , ANDERSSON M . Probability,Statistics,and Stochastic Processes[M]. New Jersey: John Wiley ＆ Sons, 2012.

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Fine C/A code acquisition algorithm for weak GPS signal based on averaging correlation and differential coherent accumulation

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