适用于Turbo均衡的改进前向MAP均衡算法  

An Improved Forward MAP Algorithm for Turbo Equalization

作　　者：孙高飞[1] 许华[1] 吴杰[1] 苟彦新[1] 

机构地区：[1]空军工程大学电讯工程学院,西安710077

出　　处：《中国电子科学研究院学报》2008年第5期529-533,共5页Journal of China Academy of Electronics and Information Technology

摘　　要：Turbo均衡是一种基于迭代处理的信号接收处理技术,能有效地改善符号干扰信道中的信号接收效果。均衡算法则对Turbo均衡的性能起着重要作用,在前向MAP信道均衡算法的基础上通过引入先验信息量度和麦克劳林级数简化,使其适用于Turbo均衡,并进行了仿真验证。结果表明这种均衡器在严重ISI信道中的性能优于MMSE,而且运算量大大降低,具有很强的实用价值。Turbo equalization is an iterative equalization and decoding technique that can achieve equally impressive performance gains for communication systems and that sends digital data over ISI channel. The equalization algorithm plays an important role in turbo equalization; this paper proposes an improved forward MAP algorithm for turbo equalization by taking account of a-priori information and utilizing the MacLaurin Series expansion. Simulation results show that this improved algorithm has better performance than MMSE algorithm in server ISI channel, and the complexity is much lower.

关 键 词：TURBO均衡 前向MAP算法 ISI信道 

分 类 号：TN911.5[电子电信—通信与信息系统]