一种新颖的低复杂度MIMO-BICM迭代接收机设计  

A Novel Low-Complexity Iterative Receiver for MIMO-BICM Systems

作　　者：尤明厚[1] 陶小峰[1] 张平[1] 韩娟[1] 徐瑨[1] 李立华[1] 

机构地区：[1]北京邮电大学无线新技术研究所

出　　处：《电子学报》2007年第B06期127-130,共4页Acta Electronica Sinica

基　　金：国家自然科学基金重大项目(No.60496312);国家自然科学基金(No.60702051);国家863高技术研究发展计划(No.2006AA01Z26;No.2007AA01Z261);教育部新世纪优秀人才支持计划资助(No.NCET-05-0116);Intel公司资助项目

摘　　要：本文提出了一种用于多入多出(MIMO)比特交织编码调制(BICM)系统的低复杂度迭代接收机方案.该方案在第一次迭代中采用线性最小均方误差(MMSE)滤波,而在随后的迭代中采用一种低复杂度MMSE结合软干扰消除(SIC)的算法来抑制残余干扰和噪声.该算法通过将软干扰消除后的残余干扰和噪声的各分量近似为不相关的随机变量,使得在MMSE滤波时不必矩阵求逆,从而大大降低了计算复杂度.仿真证实该方案可以获得和传统的基于MMSE结合SIC的方案几乎相同的性能.A low-complexity iterative receiver for multiple-input multiple-output （MIMO） bit-interleaved coded modulation （BICM） systems is proposed in this paper. In the proposed scheme, we apply finear minimum mean square error （MMSE） filter in the first iteration and utifize a new low-complexity MMSE combining with soft interference cancellation （SIC） in the following iterations to suppress residual interference and noise. By adopting the strategy that the different components of the residuals and the noise are approximated by uncorrelated random variables after the SIC, the complexity of the algorithm can be greatly reduced as the matrix inversion for MMSE is not necessary. Computer simulation results confirm that the proposed scheme can achieve almost the same performance as the conventional MMSE combining with SIC with much lower complexity.

关 键 词：迭代接收机 MIMO ST-BICM MMSE滤波 软干扰消除 

分 类 号：TN911.23[电子电信—通信与信息系统]