DocumentCode :
37976
Title :
Interleaving of local code replicas-based rapid acquisition method for time division data multiplexing long pseudo-noise-code signals
Author :
Hong Li ; Mingquan Lu ; ZhenMing Feng
Author_Institution :
Dept. of Electron. Eng., Tsinghua Univ., Beijing, China
Volume :
7
Issue :
8
fYear :
2013
fDate :
Oct-13
Firstpage :
848
Lastpage :
857
Abstract :
In global navigation satellite system, to further improve acquisition and tracking performance and consequently improve anti-jamming capability of long pseudo-noise (PN)-code signals, time division data multiplexing technique is utilised. For the signals, how to avoid possible energy cancellation of odd and even chips and how to quickly test code phases as many as possible in parallel are two keys for rapid acquisition. In this study, an interleaving of local code replicas-based acquisition method is proposed. By interleaving odd-number and even-number chips of local code replicas, the proposed method breaks the intrinsic code phase relation of PN-codes, avoids the possible energy cancellation of odd and even chips, and accelerates the search process by testing more code phases through interleaved chips. The detection and mean acquisition time performance of the proposed method is analysed. It is shown that compared with the previous time-gate method, the proposed method greatly saves computation requirement by taking the advantage of frequency-domain correlation technique over time-domain one. Compared with the L2C-like method, the proposed method enhances the capability of testing code phases in parallel twice at the expense of degrading detection performance. Numerical results demonstrate that when the capability dominates over detection performance the proposed method is more desirable.
Keywords :
data acquisition; frequency-domain analysis; interleaved codes; jamming; pseudonoise codes; replica techniques; satellite navigation; signal denoising; time division multiplexing; time-domain analysis; tracking; PN-code signal; antijamming capability; code phase testing; energy cancellation; even-number chips; frequency-domain correlation technique; global navigation satellite system; interleaving odd-number chips; intrinsic code phase relation; local code replicas; local code replicas-based acquisition method; local code replicas-based rapid acquisition method; mean acquisition time performance; rapid acquisition; test code phases; time division data multiplexing long pseudonoise-code signals; time division data multiplexing technique; time-domain technique; time-gate method; tracking performance;
fLanguage :
English
Journal_Title :
Radar, Sonar & Navigation, IET
Publisher :
iet
ISSN :
1751-8784
Type :
jour
DOI :
10.1049/iet-rsn.2012.0087
Filename :
6619462
Link To Document :
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