重复累积码在协作分集系统中的应用研究

由于重复累积(repeat accumulate, RA)码兼具LDPC (low density parity code)码译码简单和Turbo码编码容易实现的优点,使其成为信道编码领域的一大研究热点.而编码协作作为一种将信道编码与协作分集系统相结合的工作方式,能同时为通信系统带来编码增益和分集增益.对协作分集系统进...

Application of repeat-accumulate code in the cooperative system

As the repeat accumulate code (RA code) had the advantage of low density parity code (LDPC) and Turbo code. So it became a research focus in the field of channel coding. As a way to combine the channel coding with cooperative diversity system, the coded cooperation could bring both coding gain and diversity gain to the communication system. In this paper, the cooperative diversity system had been studied and a scheme was also proposed which applies RA code in cooperative diversity system. It could realize virtual diversity by two different users sending different parts of the code in separate channels. The result showed that the bit error rate in RA code cooperative diversity system was lower than that in the non cooperative diversity system. So the performance of RA code cooperative diversity system had been significantly increased.