摘要
空时分组码是一种可在瑞利衰落信道中使用多天线传输信息的新方法。该文研究了一种在发射端已知信道状态信息条件下的四个发射天线、全分集、全速率编码方案。此方案利用了传输重量,可得到正交空时编码,且在接收端使用最大比例组合得到各输出支路的极小距离判决译码,它能取得与最大似然译码同样的性能,且译码复杂度大为降低。
Space-time block codes is a new paradigm for transmission over Rayleigh fading channels using multiple transmit antennas.＇ In this paper a new rate 1 coding scheme which exploits Channel State Information available at the emitter with full diversity for 4 transmit antennas is proposed. This scheme is an orthogonal one thanks to transmit weights at the emitter, which gets Minimal Distance Detection decoding of each output according to Maximum Ratio Combining technique and achieves same performance as Maximum likelihood decoding , besides the complexity of decoding decreases largely.
出处
《微计算机信息》
北大核心
2005年第11X期146-148,共3页
Control & Automation
基金
国家自然科学基金项目
通信信号-TUR-BO处理
项目编号:NSF60172029
关键词
分集
多路径信道
空时码
无线通信
diversity , Multipath channels, Space-time codes,Wireless communications
