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Multiple-Symbol Differential Detection Scheme of Differentially Encoded MultiPhase Clipped MultiCode CDMA System  

이병하 (연세대학교 전기전자공학과 이동통신연구실)
안철용 (연세대학교 전기전자공학과 이동통신연구실)
김동구 (연세대학교 전기전자공학과 이동통신연구실)
조진웅 (한국전자부품연구원)
Publication Information
The Journal of Korean Institute of Communications and Information Sciences / v.28, no.10A, 2003 , pp. 807-815 More about this Journal
Abstract
MultiCode-CDMA (MC-CDMA) system of chip level MPSK incorporating with clipper (MP-CDMA)[l] shows constant envelope signal which can mitigate the performance degradation due to nonlinear transmit amplifier. In this paper, modulation is modified to carry out differential encoded MPSK rather than MPSK. The modified system is called DMP-CDMA. DMP-CDMA using differential detection has advantages on receiver complexity and pilot overhead. However, it is inferior to coherent detection by about 4.0dB due to inherent power inefficiency of noncoherent detection and the error propagation. Multiple symbol differential detection is employed in order to improve DMP-CDMA using differential detection. As the result, the performance of DMP-CDMA system is improved about 3.6dB compared to differential detection.
Keywords
MultiCode-CDMA; MultiPhase Clipped MultiCode CDMA; Multiple-Symbol differential detection;
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  • Reference
1 K. Ben Letaief, J. C-I Chuang, and R. D. Murch, 'Multicode high-Speed Transmission for Wireless Mobile Communications', Proceedings of the IEEE International Conference on Universal Personal Communications, 1996, pp.1835-1839
2 Cheol Yong Ahn, Dong Ku Kim, Chi Hun Ahn, and Seung Moon Ryu, 'Multi Phased MC-CDMA System for Transmitting the High Rate Data', the 6th CDMA International Conference, November 2001, pp.81
3 Dariush Divsalar, Marvin K. Simon, 'Multiple-Symbol Differential Detection of MPSK', IEEE Transactions on communications, pp.300-308, March 1990
4 Jinkang Zhu, Hongbin Zhang and Yucong Gu, 'Principle and Performance of Variable Rate Multi-code CDMA Method', Proceedings of the IEEE International Conference on Universal Personal Communications, 1995, pp. 256-259
5 John G. Proakis, Digital Communications, 3rd ed. McGraw-Hill, 1995
6 C-L I, G. P. Pollini, Larry Ozarow, and Richard D. Gitlin, 'Performance of MultiCode CDMA Wireless Personal Communications Networks', Proceedings of the IEEE Vehicular Technology Conference, 1995, pp. 907-911