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DS-SS/TDMA Preamble Structure and Code Acquisition Method for Enhanced Code Acquisition Performance  

Ryu, Young-Jae (국방과학연구소 2기술연구본부)
Jang, Jeen-Sang (국방과학연구소 2기술연구본부)
Publication Information
The Journal of Korean Institute of Communications and Information Sciences / v.35, no.11B, 2010 , pp. 1725-1731 More about this Journal
Abstract
In this paper, we proposed preamble structure and code acquisition method to improve code acquisition performance for DS-SS/TDMA packet communication systems. Proposed algorithm changes the short PN code position depending on the sub slot number. Proposed algorithm also saves position differences between short PN codes and position offsets between short PN codes and data starting position of the TDMA packet. By using the position difference table, proposed algorithm can find out exact data starting position even though some sub slots were defected. As a result of simulation, we concluded that proposed algorithm has at least 5dB gain compared to conventional method when same short PN code is used. Moreover, proposed algorithm shows same code acquisition performance only with 1/4 shortened short PN code compared to conventional method.
Keywords
Direct Sequence Spread Spectrum; TDMA; Preamble Structure; Code Acquisition; Preamble Detection;
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  • Reference
1 A. Chockalingam, Gang Bao, "Probability of Miss Analysis for Packet CDMA Acquisition on Rician-Fading Channels," IEEE Commun. Letters, Vol.2, No.7, July 1998.
2 D. Falconer, F. Adachi, B. Gudmundson, "Time Division Multiple Access Methods for Wireless Personal Communications," IEEE Commun. Mag., Jan 1995.
3 P. Djukic, S. Valaee, "Distributed Link Scheduling for TDMA Mesh Networks," in Proc. ICC'2007, June 2007.
4 R. Lyman Ott, M. Longnecker, "An Introduction to Statistical Methods and Data Analysis," 6th edition, Cengage Learning, 2008.
5 B. Sklar, "Digital Communications- Fundamentals and Applications," 2nd Edition, Prentice Hall, 2000
6 J. C. Lin, "Noncoherent Sequential PN Code Acquisition Using Sliding Correlation for Chip-Asynchronous DS/SS Communications," IEEE Trans. Commun., Vol.50, No.4, Apr 2002.
7 A. Polydoros, C. L. Weber, "A Unified Approach to Serial Search Spread Spectrum Code Acquisition - Part I : General Theory," IEEE Trans. Commun., Vol. COM-32, No.5, May 1984.