ITERATIVE "ONE-SHOT" DECORRELATION IN DS-CDMA SYSTEMS  

作　　者：Du Zheng Zhu Jinkang (PCN&SS Lab, University of Science and Technology of China, Hefei 230027) 

出　　处：《Journal of Electronics(China)》2003年第6期414-422,共9页电子科学学刊（英文版）

摘　　要：In this paper, an iterative 'one-shot' decorrelator for asynchronous code Division Multiple Access(CDMA) systems is proposed. This decorrelator feedbacks the decorrelated symbols of interfering users before decision to mitigate their interferences. As a result, this decorrelator is a linear detector and does not need any amplitude information of users as in decision-feedback detectors. Compared with existing 'one-shot' decorrelator, it has reduced complexity and provided better performance while eliminating all Multiple Access Interference(MAI). The performance of this decorrelator is analyzed thoeritically, and analytical result is given. Numerical results show near-far resistant capability of this decorrelator in both AWGN and fading channel.In this paper, an iterative "one-shot" decorrelator for asynchronous code Division Multiple Access(CDMA) systems is proposed. This decorrelator feedbacks the decorrelated syrnbols of interfering users before decision to mitigate their interferences. As a result, this decorrelator is a linear detector and does not need any amplitude information of users as in decisionfeedback detectors. Compared with existing "one-shot" decorrelator, it has reduced complexity and provided better performance while eliminating all Multiple Access Interference(MAI). The performance of this decorrelator is analyzed thoeritically, and analytical result is given. Numerical results show near-far resistant capability of this decorrelator in both AWGN and fading channel.

关 键 词：Code Division Multiple Access(CDMA) system Decorrelator Multiple Access Interference(MAI) 

分 类 号：TN929.533[电子电信—通信与信息系统]