差错控制编码差分酉空时调制系统迭代检测法

Iterative Detection Method for Error Control Coded Differential Unitary Space-time Modulation Systems

针对采用差错控制编码的差分酉空时调制系统,在平坦及频率选择性衰落瑞利信道下提出了一种迭代检测法。差分酉空时调制可视为递归卷积码,使用差错控制编码后的差分酉空时调制可视为一种串行级联码。提出了一种差分酉空时调制的软输出后验概率译码器以及迭代检测法,以获得附加的编码增益。仿真结果表明,在平坦及频率选择性衰落瑞利信道下,所提方案均可得到优异的系统性能。

An iterative detection method is proposed for error control coded differential unitary space-time modulation （DUSTM） systems in fiat and frequency selective Rayleigh fading channels. The DUSTM can be seen as a recursive convolutional code, and error control coded DUSTM can be consid- ered as a serial concatenation code. Therefore a soft-output posteriori probability decoder of DUSTM and the iterative detection method are proposed to get the additional coding gain. Simulation results demonstrate that the proposed detection method has good performance in both fiat and frequency selec- tive Rayleigh fading channels.