论文信息 - Code acquisition in DS/SS system using periodic property of PN code

Code acquisition in DS/SS system using periodic property of PN code

An effective code acquisition method using the periodicity property of PN codes and the probability of AWGN is proposed for the DS/SS system. The method of utilizing this periodic property of the spreading signal in a pilot channel is investigated and a simple averaging filter suitable for the AWGN channel is derived. In addition, we describe the method of composing the proposed averaging filter to the conventional acquisition system and the capability of using sequential estimation in a CDMA system with asynchronous mode. The simulation results show that the mean acquisition time is reduced with the proposed acquisition system, especially in the low SNR region.

Kyung-Woon Jang | Tae-Hoon Kim | Jeong-Hee Choi | Yong-Wan Park

[1] Witold A. Krzymien,et al. Rapid Acquisition Algorithms for Synchronization of Bursty Transmission in CDMA Microcellular and Personal Wireless Systems , 1996, IEEE J. Sel. Areas Commun..

[2] J. Holmes,et al. Acquisition Time Performance of PN Spread-Spectrum Systems , 1977, IEEE Trans. Commun..

[3] Giovanni Emanuele Corazza. On the MAX/TC criterion for code acquisition and its application to DS-SSMA systems , 1996, IEEE Trans. Commun..

[4] S. Haykin,et al. Adaptive Filter Theory , 1986 .

[5] Andreas Polydoros,et al. A Unified Approach to Serial Search Spread-Spectrum Code Acquisition - Part II: A Matched-Filter Receiver , 1984, IEEE Transactions on Communications.

[6] Yong-Hwan Lee,et al. Sequential Acquisition of PN Sequences for DS/SS Communications: Design and Performance , 1992, IEEE J. Sel. Areas Commun..

[7] Andrew J. Viterbi,et al. On the capacity of a cellular CDMA system , 1991 .

[8] Hamid Aghvami,et al. Direct sequence spread spectrum matched filter acquisition in frequency-selective Rayleigh fading channels , 1994, IEEE J. Sel. Areas Commun..

[9] R. Ward,et al. Acquisition of Pseudonoise Signals by Sequential Estimation , 1965 .

[10] L. B. Milstein,et al. Spread spectrum access methods for wireless communications , 1995, IEEE Commun. Mag..

[11] Andreas Polydoros,et al. A Unified Approach to Serial Search Spread-Spectrum Code Acquisition - Part I: General Theory , 1984, IEEE Transactions on Communications.