一种基于ML准则的适用于频率选择性多径衰落的多用户检测算法
A MULTIUSER DETECTOR DERIVED FROM ML CRITERIA FOR CDMA FREQUENCY SELECTIVE FADING CHANNEL
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摘要: 本文采用ML准则得出了适于频率选择性衰落的线性解相关算法。仿真表明本方法性能优于Zvonar提出的先解相关再最大比值合并的算法;且该方法由于采用等价扩频序列实现,硬件耗费也较少。Abstract: In this paper, a decorrelator for multiuser detection derived from ML criteria in CDMA system is proposed for frequency selective fading channels. Simulations prove the better performance of this method than the method proposed by Zvonar in which the paths of the same user are combined after decorrelating. This method utilizes equivalent spreading codes for decorrelating, thus the hardware complexity is reduced.
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Lupas R,Verdu S.Neax-fax resistance of multi-user detectors in asynchronous channels,IEEE Trans.on Commun.,1990,COM-38(4),496-508.[2]Lupas R,Verdu S.Linear multiuser detectors for asynchronous code-division multiple-access channels,IEEE Trans.on Inform.Theory,1989,IT-35(1),123-136.[3]Zvonar Z,Brady D.Linear multipath-decorrelating receivers for CDMA frequency-selective fading channels,IEEE Trans.on Comm.,1996,COM-44(6),650-653.[4]李道本编著．信号的统计检测与估计理论．北京：北京邮电大学出版社，1996，第三章，第3-2节．[5]Proakis J.Digital Communications,3rd Edition,New York:McGraw-Hill,1995,Chap.14-1-1.[6]方开泰编著．实用多元统计分析．上海：华东师范大学出版社，1989，第一章，第1.4节． -
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