基于多带复小波的多载波DS-CDMA及性能  

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

作　　者：虞湘宾[1] 毕光国[1] 

机构地区：[1]东南大学移动通信国家重点实验室,江苏南京210096

出　　处：《应用科学学报》2004年第2期144-148,共5页Journal of Applied Sciences

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.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).

关 键 词：多带复小波 多载波技术 DS-CDMA 直接序列码分多址 空间分集合并 

分 类 号：TN914.53[电子电信—通信与信息系统]