支持多速率服务的差分空时分组编码OFDMA  

Differential space-time block-coded OFDMA for multirate services

作　　者：陈钟麟[1] 朱光喜[1] 蔡玮[1] 

机构地区：[1]华中科技大学电子与信息工程系,湖北武汉430074

出　　处：《通信学报》2004年第1期34-42,共9页Journal on Communications

基　　金：国家"863"基金资助项目(2001AA121031)

摘　　要：针对多用户/多速率环境提出了非相干传输方案,通过采用双发射天线,该设计可确保在频率选择性衰落信道中实现全码率、满分集通信。与已有的差分空时编码OFDM设计相比,本方案对信号星图无任何限制,因而可通过幅度和相位同时携带信息提高频谱效率。A noncoherent transmission scheme in a multiuser/ multirate setting, which allow full-rate and full-diversity communication over frequency-selective fading channels using two transmit antennas. Compared with the existing differential space-time coded OFDM designs, our scheme imposes no restrictions on underlying signal constellations. This generalization potentially allows the spectral efficiency to be increased by carrying information not only on phases but also on amplitudes.

关 键 词：空时码 差分调制 频率选择性衰落 OFDMA 差分空时分组编码 正交频分多址 

分 类 号：TN911.22[电子电信—通信与信息系统]