新型基于QR分解的低复杂度MIMO迭代接收机  

A Low-Complexity QR Factorization Based Iterative Receiver for MIMO Systems

作　　者：陈亮[1] 李建东[1] 

机构地区：[1]西安电子科技大学综合业务网理论与关键技术国家重点实验室,陕西西安710071

出　　处：《电子学报》2007年第B06期25-29,共5页Acta Electronica Sinica

基　　金：国家杰出青年科学基金(No.60725105);国家自然科学基金重大项目(No.60496316);国家自然科学基金项目(No.60572146);高等学校博士学科点专项科研基金(No.20050701007);高等学校优秀青年教师教学科研奖励计划;教育部科学技术研究重点项目(No.107103)

摘　　要：本文提出了一种应用于MIMO系统的新型低复杂度迭代接收机.接收端采用基于QR分解的干扰抵消,对不同层分组并进行部分并行干扰抵消,组内采用MAP联合检测输出软信息,通过交织解交织器将软入软出检测器与turbo迭代译码器级联起来,经过迭代有效的消除了多天线间的干扰.文中采用三维外信息转移图分析了接收机迭代过程.与传统基于QR分解的串行干扰抵消迭代接收机相比性能有了极大提高,并且受信噪比估计误差的影响较小.A novel low-complexity iterative receiver in Multiple Input Multiple Output （MIMO） channel is presented. Partial parallel interference cancellation based on QR decomposition is used in, which different layers is grouped and jointly detected by MAP.The interference between different antennas is cancelled effectively through serially concatenating a soft input soft output （SISO） detector and Turbo decoder by iterative process. Three dimension extrinsic information transfer characteristics （3D EXIT charts） are used to analysis the processes of iterative. Compared with traditional QR based serial interference cancellation iterative receiver, the perfonnanee of the proposed receiver is improved greatly. And it is not sensitivity to the mismatched SNR.

关 键 词：QR分解 迭代 干扰抵消 三维外信息转移图 

分 类 号：TN911.5[电子电信—通信与信息系统]