摘要
提出一种基于多带复小波和空时编码的多载波CDMA系统,研究了其在瑞利衰落信道下的误比特性能。理论分析和仿真结果表明该系统要明显优于通常MC-CDMA系统,具有与采用循环前缀(CP)的MC-CDMA相比较的优势,而且能够克服通常MC-CDMA系统插入CP所带来能量的减少和频谱效率的降低。同时空时编码技术的应用,显著增强了系统抗多径干扰和多址干扰的能力,进一步提高了系统性能。
A novel MC-CDMA system based on optimized multiband complex wavelet and space-time coding was proposed, and the system bit error rate (BER) performance was investigated in Rayleigh fading channel. Theoretical analysis and simulation results show that the proposed system outperforms conventional MC-CDMA system, and it has comparative superiority to the conventional MC-CDMA with cyclic prefix (CP). Moreover, the system can overcome the decrease of spectrum efficiency and energy of conventional MC-CDMA due to inserting CP. Especially, the application of space-time coding technique significantly improves system ability to combat multi-path interference and multi-access interference.
出处
《通信学报》
EI
CSCD
北大核心
2005年第4期45-51,共7页
Journal on Communications
关键词
多载波码分多址
空时编码
多带复小波
multi-carrier code division multiple access
space-time coding
multiband complex wavelet
