PDA DETECTOR FOR DS-CDMA COOPERATIVE SYSTEM  

作　　者：Mei Zhonghui Meng Qingmin Li Xiaofei Wu Lenan 

机构地区：[1]College of Telecommunication and Information Engineering, Nanjing University of Posts and Telecommunications, Nanjing 210003, China [2]College of Information Science Engineering, Southeast University, Nanjing 210005, China

出　　处：《Journal of Electronics(China)》2009年第6期812-818,共7页电子科学学刊（英文版）

基　　金：Supported by the National Natural Science Foundation of China (No. 60772061);Science Foundation of Nanjing University of Posts and Telecommunications (No. NY207132);the Postdoctoral Research Programs (No. 0801054B)

摘　　要：This paper considers the uplink of a cooperative Code-Division Multiple-Access (CDMA) system where parts of mobile nodes serve as source nodes while the others serve as relay nodes at any instant in time. When the non-orthogonal spreading codes are adopted,Multiple Access Interference (MAI) will exist at both the relay nodes and the base node,causing diversity gain to diminish. To mitigate MAI and exploit full advantages of cooperation,the Probabilistic Data Association (PDA) is developed at the relay nodes and the base node. Simulation results demonstrate that some performance gains can be obtained by the PDA detector over the Minimum Mean Square Error (MMSE) detector at high Signal-to-Noise Ratio (SNR) and conversely at low SNR.This paper considers the uplink of a cooperative Code-Division Multiple-Access （CDMA） system where parts of mobile nodes serve as source nodes while the others serve as relay nodes at any instant in time. When the non-orthogonal spreading codes are adopted, Multiple Access Interference （MAI） will exist at both the relay nodes and the base node, causing diversity gain to diminish. To mitigate MAI and exploit full advantages of cooperation, the Probabilistic Data Association （PDA） is developed at the relay nodes and the base node. Simulation results demonstrate that some performance gains can be obtained by the PDA detector over the Minimum Mean Square Error （MMSE） detector at high Signal-to-Noise Ratio （SNR） and conversely at low SNR.

关 键 词：Cooperative communication Multiuser detection Probabilistic Data Association （PDA） Code-Division Multiple-Access （CDMA） 

分 类 号：TN929.533[电子电信—通信与信息系统] TP393[电子电信—信息与通信工程]