Successive beamforming, multiuser detection and diversity reception for multicarrier DS-CDMA system with antenna array

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• 作者：Wei Yang (1)
  Junshi Chen (1)
  Zhenhui Tan (1)
  Shixin Cheng (1) (2)
  
• 关键词：Antenna array ; Multicarrier Direct Sequence Code ; Division Multiple ; Access (DS ; CDMA) ; MultiUser Detection (MUD) ; Diversity ; TN911.23
• 刊名：Journal of Electronics (China)
• 出版年：2007
• 出版时间：September 2007
• 年：2007
• 卷：24
• 期：5
• 页码：607-612
• 全文大小：219KB
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  9. R. Lupas, S. Verdu. Linear multiuser detectors for synchronous code-division multiple access channels. / IEEE Trans. on IT, IT-35(1989)1, 123鈥?36. CrossRef
  
• 作者单位：Wei Yang (1)
  Junshi Chen (1)
  Zhenhui Tan (1)
  Shixin Cheng (1) (2)
  
  1. School of Electronics and Information Engineering, Beijing Jiaotong University, Beijing, 100044, China
  2. National Mobile Communications Research Laboratory, Southeast University, Nanjing, 210096, China
  
• ISSN：1993-0615

文摘

Code-Division Multiple-Access (CDMA) systems are interference limited, and therefore efficient interference management is necessary to enhance the performance of a CDMA system. In this paper, a successive beamforming (spatial filtering), linear decorrelating MultiUser Detection (MUD, temporal filtering) and diversity reception structure for uplink multicarrier Direct Sequence CDMA (DS-CDMA) system with antenna array are proposed. By beamforming, the antenna array suppresses interference according to the distinct array signature. Subsequently, linear decorrelating MUD is applied to separate the signals of different users and eliminate Multiple Access Interference (MAI). Finally, the decorrelated signals at different subcarriers that belong to the same user are combined to achieve frequency diversity. Simulation results show that the proposed structure offers significant Bit Error Rate (BER) performance improvement by successively exploiting the space-time-frequency processing.