HYBRID ORTHOGONAL/RANDOM MULTIPLE ACCESS SCHEME WITH IMPROVED PERFORMANCE FOR DOWNLINK CDMA SYSTEMS  

作　　者：Zhou Gao Fan Pingzhi Hao Li 

机构地区：[1]Southwest Jiaotong University, Chengdu 610031, China

出　　处：《Journal of Electronics(China)》2008年第1期47-52,共6页电子科学学刊（英文版）

基　　金：Supported by the National Natural Science Foundation of China (No.60402017/90604035);the Sichuan Youth Science Foundation (No.05ZQ026-026).

摘　　要：In this paper, a hybrid orthogonal and random multiple access scheme with improved performance for capacity-enhanced downlink Code-Division Multiple-Access (CDMA) systems is presented, which is in fact a combination of the conventional orthogonal spreading scheme and the synchronous Interleave Division Multiple Access (IDMA) scheme. The proposed scheme can achieve near single user performance for very large number of users by the iterative turbo like detection. Analysis and simulation results show that the proposed scheme performs better than the synchronous IDMA scheme for the same time complexity. Meanwhile, larger capacity can be provided compared with the conventional orthogonal schemes.In this paper, a hybrid orthogonal and random multiple access scheme with improved performance for capacity-enhanced downlink Code-Division Multiple-Access （CDMA） systems is presented, which is in fact a combination of the conventional orthogonal spreading scheme and the synchronous Interleave Division Multiple Access （IDMA） scheme. The proposed scheme can achieve near single user performance for very large number of users by the iterative turbo like detection. Analysis and simulation results show that the proposed scheme performs better than the synchronous IDMA scheme for the same time complexity. Meanwhile, larger capacity can be provided compared with the conventional orthogonal schemes.

关 键 词：Code-Division Multiple-Access （CDMA） Interleave-Division Multiple-Access （IDMA） Multi-User Detection （MUD） Hybrid multiple access 

分 类 号：TN914.53[电子电信—通信与信息系统]