摘要
给出了一种简单的空时编码方案 ,提出了应用该方案的基于复数滤波器组调制的多载波码分多址( CFBM-MC-CDMA)通信系统的模型。理论分析可知 ,采用空时编码天线发射分集技术的 CFBM-MC-CDMA系统与未采用天线分集的系统相比 ,其多址干扰功率降低了一半。仿真结果表明 ,系统采用天线分集技术能显著提高其误比特率性能 ,在低信噪比区域 ,系统采用两天线分集接收的性能要比采用两天线分集发射的性能好得多。
The principle of complex filter bank modulation and a space-time coding method are introduced. A complex filter bank modulation based multicarrier code division multiple access (CFBM-MC-CDMA) communication system model is proposed. The model employs antenna transmit diversity and space-time coding. Theoretical analysis shows that the multiple access interference power of the system decreases 1/2 than that of the system without antenna diversity. When the antenna transmission diversity/space-time coding or antenna reception diversity is employed, simulation reveals that the system performance is obviously improved. If the SNR is lower than that of antenna reception diversity, the system performance is better than the one with antenna transmit diversity.
出处
《数据采集与处理》
CSCD
2002年第4期366-370,共5页
Journal of Data Acquisition and Processing
基金
江苏省高校自然科学研究计划 (编号 :0 2 KJB5 1 0 0 0 7)资助项目
