摘要
提出了一种结合频率切换分集(Frequency-Switched Transmit Diversity,FSTD)技术的空频编码方法。该方法通过将4个发射符号扩展为2组Alamouti编码以及采取星座图旋转的处理方式,获得了全分集全码率增益。仿真结果表明,所提方法的性能优于基于相移分集(Phase shift diversity,PSD)技术的空频编码方法,且能够保持编码速率为1,是一种适用于航空通信的空频编码方法。
A space-frequency coding combined with FSTD is proposed.A full diversity and full rate gain is obtained based on transforming four transmitting symbols into two groups of Alamouti coding and the application of constellation rotation.The experiment results shows that the performance of the proposed method is better than that of PSD with remaining one of the code rate.It is a reliable space-frequency coding adapted to aeronautical communication.
出处
《飞机设计》
2011年第2期48-50,共3页
Aircraft Design
关键词
空频编码
频率切换分集
星座图旋转
space-frequency coding
frequency-switched transmit diversity
constellation rotation
