无线通信中的恒模类盲均衡算法研究  

A Study on Constant Modulus Blind Equalization Algorithm in Wireless Communications

作　　者：张玲[1] 

机构地区：[1]南京邮电大学通信与信息工程学院,江苏南京210003

出　　处：《通信技术》2007年第12期72-73,76,共3页Communications Technology

摘　　要：在无线通信系统中,码间干扰(ISI)是影响通信质量的重要因素。盲均衡技术不需要发送导频序列便能自适应调节均衡器抽头系数,能够有效去除ISI。文中介绍了盲均衡技术原理,重点研究了恒模类盲均衡算法,通过对恒模算法(CMA)和改进的CMA算法(包括MMA算法和双模式盲均衡算法)的迭代公式分析,得出了恒模类盲均衡算法的性能。计算机仿真表明恒模类盲均衡算法在无线通信中具有良好的均衡性能。The intersymbol interference（ISI） is a primary cause to degrade the performance of the wireless communication systems. Adaptive blind equalization algorithms are used to adjust equalizer coefficients and remove the ISI without the aid of training sequences. This paper introduces the principle of blind equalization technique. Constant modulus adaptive blind equalization algorithms are emphatically studied. By the analysis of CMhand the modified CMA, including the MMAand the dual-mode blind equalization algorithm. the performance of constant modulus algorithms is obtained. Computer simulations show that constant modulus algorithm has excellent performance in equalizing the channel of wireless communications

关 键 词：盲均衡 恒模算法 无线通信 

分 类 号：TN911.5[电子电信—通信与信息系统]