变步长双模式盲均衡算法在复合系统中的应用  

Application of varying-step dual-mode blind equalization algorithm in the multiplex system

作　　者：郭黎利[1] 叶桂林[1] 李海明[1] 

机构地区：[1]哈尔滨工程大学信息与通信工程学院,哈尔滨150001

出　　处：《信息技术》2008年第7期71-73,77,共4页Information Technology

摘　　要：在复合系统通信中,飞行器的高动态性引起多普勒频移,使载波频率偏移引起接收相位发生旋转,应用恒模(CMA)算法,不能克服信号相位旋转。给出了一种变步长双模式盲均衡算法,该算法在快速收敛基础上能有效克服相位旋转,同时保证稳态误差在可靠范围之内。仿真结果证明,应用该算法的复合系统具有良好的抗多径干扰能力和更好的测距性能。In the communication of multiplex system, Doppler shift was involved because of the high dynamic state of the aircraft, phase rotation of received signal is produced. It is difficult to overcome the phase rotation using the CMA algorithm. A variable step and dual mode blind equalization algorithm is proposed, the proposed algorithm can overcome the phase rotation on the base of quick convergence and keep the error in a robust state and in a reliable bound. The result proves that the multiplex system with the improved algorithm has strong suppression ability of ISI and improves the capability of measurement.

关 键 词：复合系统 信道盲均衡 MCMA—DD—LMS 变步长 

分 类 号：TN911.72[电子电信—通信与信息系统]