级联SS/QC-LDPC-MIMO通信系统性能研究

在MIMO通信技术中,对于如何减少码间干扰和降低噪声的影响是重要的研究课题。文中给出了MIMO通信系统的模型图,模拟了3种不同线性检测算法,并在系统的输入端级联上扩频技术和QC-LDPC信道编码技术,通过比较级联系统和MIMO系统信噪比与误码率之间的关系,给出了理论推导和性能仿真结果。结果表明,通过级联后的信道性能,减少了码间干扰,降低了噪声,明显优于一般的MIMO系统。

Study on the Cascade SS/QC-LDPC-MIMO Communication System

In MIMO communications,the reduction of inter-symbol interference and the impact of noise is very important a topic.In this paper,we first give a general MIMO communication system model diagram,followed by a simulation of the similarities and differences between the three different linear detection algorithms.Then spread spectrum technology and QC-LDPC channel coding techniques are cascaded at the input.The theory deduction and simulation results are given by comparing the relation between the cascade system and general MIMO system SNR and BER.The results show that the cascading reduces inter-symbol interference and noise,and is significantly better than the general MIMO system.