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应用科学学报 ›› 2004, Vol. 22 ›› Issue (2): 144-148.

• 论文 • 上一篇    下一篇

基于多带复小波的多载波DS-CDMA及性能

虞湘宾, 毕光国   

  1. 东南大学移动通信国家重点实验室 江苏南京 210096
  • 收稿日期:2003-01-07 修回日期:2003-05-07 出版日期:2004-06-30 发布日期:2004-06-30
  • 作者简介:虞湘宾(1972-),男,江苏金湖人,博士生;毕光国(1939-),男,上海人,教授,博导.

The Performance of MC-DS-CDMA Based on the Multi-band Complex Wavelet

YU Xiang-bin, BI Guang-guo   

  1. National Mobile Communications Research Lab, Southeast University, Nanjing 210096, China
  • Received:2003-01-07 Revised:2003-05-07 Online:2004-06-30 Published:2004-06-30

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95

被引次数

1

摘要： 在分析多载波DS-CDMA (MC-DS-CDMA)的基础上,利用优化生成的多带复小波,提出一种新的基于多带复小波的多载波DS-CDMA,研究了其在瑞利衰落信道下的误码率性能.并采用空间分集合并(SDC)技术进一步完善其上行链路性能.理论分析和仿真结果表明该系统要优于通常的MC-DS-CDMA和基于实小波包的MC-DS-CDMA,具有良好的抗衰落能力;且基于SDC技术的该系统能显著增强系统抗多径干扰和多址干扰的能力,具有较低误码率.

关键词: 直接序列码分多址, 空间分集合并, 多带复小波, 多载波技术

Abstract: In this paper, through analyzing the principle of MC-DS-CDMA, we propose a novel multi-band complex wavelet based on the MC-DS-CDMA system by adopting the optimized multi-band complex wavelet. We also investigate the system bit error rate (BER) performance in the multi-path Rayleigh fading channel. Meantime, the space diversity combining (SDC) technique is exploited to further perfect the system's performance. Simulation results show that the proposed system outperforms the conventional MC-DS-CDMA and the real wavelet packet based MC-DS-CDMA, it has superior capability against fading. The proposed SDC-based system with lower BER can significantly strengthen the capability to combat multi-path interference and multi-access interference (MAI).

Key words: multi-band complex wavelet, multi-carrier technique, SDC, DS-CDMA

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