一种改进的QAM信号的恒模算法：MCADAMA  

A Modified CMA Algorithm of QAM System:MCADAMA

作　　者：孔媛媛[1] 王欣[2] 鄷广增[2] 

机构地区：[1]南京邮电大学研究生部,江苏南京210003 [2]南京邮电大学通信与信息工程学院,江苏南京210003

出　　处：《南京邮电大学学报（自然科学版）》2009年第3期73-77,共5页Journal of Nanjing University of Posts and Telecommunications：Natural Science Edition

基　　金：国家自然科学基金(60472104);南京邮电大学青蓝计划(NY207122);江苏省高校研究生创新计划(CX07B_106z)资助项目

摘　　要：提出了一种适用于QAM系统的改进的双模式算法MCADAMA(modified CMA-assisted decision adjusted modulus algorithm)。通过研究Axford提出的CADAMA双模式算法,受到MCMA算法的启发,结合恒模算法的特性,研究出了MCADAMA算法。通过搭建QAM盲均衡系统平台,把MCADAMA算法和其他3种恒模算法进行了比较,仿真结果表明,MCADAMA算法具有更快的收敛速度和更低的误码率,有效地提高了系统性能。We proposed a dual mode CMA algorithm MCADAMA （modified CMA-assisted decision adjusted modulus algorithm）, which is suitable for QAM signal. Inspired by the MCMA, based on the study of dual-mode CMA algorithm CADAMA proposed by Axford, we proposed and studied the MCADAMA algorithm and compared MCADAMA with other three CMA algorithms based on a blind equalization system of QAM. The simulation results showed that the MCADAMA has faster convergence rate and lower bit error rate, and can improve system performance effectively.

关 键 词：恒模算法 QAM CADAMA MCADAMA 

分 类 号：TN929.5[电子电信—通信与信息系统]