基于硬判决的BICM-ID的Turbo均衡及其改进  

Turbo equalization and its improvement in BICM-ID based on hard-decision

作　　者：赵春晖[1] 吕强[1] 毕文斌[2] 

机构地区：[1]哈尔滨工程大学信息与通信工程学院,黑龙江哈尔滨150001 [2]中国船舶重工集团公司,北京100085

出　　处：《通信学报》2009年第5期42-47,共6页Journal on Communications

基　　金：高等学校优秀青年教师教学科研奖励计划资助项目(2001-226)~~

摘　　要：传统的接收机中均衡器和信道译码器是相互独立的,Turbo均衡是一种联合均衡和译码技术,通过迭代在均衡器和译码器之间交换外信息,从而获得更好的性能。将Turbo均衡中的软干扰抵消(SIC)算法应用到基于硬判决的BICM-ID系统中,并对其进行改进。仿真结果表明在不同衰落程度的ISI信道中算法能有效收敛,且系统均衡后性能随着信噪比的增加越来越接近AWGN下性能。Conventional receivers executed equalization and channel decoding independently. Turbo equalization was a technique which combined equalization and decoding. It got better performance by exchanging the extrinsic information iteratively between the equalizer and decoder. The SIC algorithm of Turbo equalization to BICM-ID system based on hard-decision was applied and an improved method was also proposed. Simulation results show that this algorithm leads to convergence in ISI channels with different fading degree and it approaches the performance in AWGN gradually along with the increasing SNR.

关 键 词：硬判决 BICM—ID TURBO 均衡 软干扰抵消 

分 类 号：TN911.22[电子电信—通信与信息系统]