摘要
由于受多径传输和有限带宽的影响,无线信道不可避免地存在码间干扰和信道间干扰。盲均衡技术是一种不需要训练序列就能补偿信道畸变的新兴自适应均衡技术。文中从Bussgang类盲均衡原理出发,讨论了属于Bussgang类的CMA盲均衡算法,并利用Simulink对算法进行了仿真。从仿真结果可看出步长对算法收敛性能和精度的影响,步长越小,收敛速度越慢,但稳态误差越小;反之亦然。
ISI and ICI are inevitable in wireless channel due to the effect of multi-path transmission and limited bandwidth. Blind equalization, as a novel adaptive equalization technique without the aid of training sequence, could equalize the channel distortions. With the principle of Bussgang blind equalization, the Bussgang-like blind equalization algorithms based on CMA is discussed in this paper. Simulation on the algorithm with Simulink indicates the influence of step size on the convergence performance and accuracy, the smaller the step size, and the slower the convergence, and vice versa.
出处
《通信技术》
2011年第12期19-20,23,共3页
Communications Technology
关键词
盲均衡
常数模算法
步长
blind equalization
CMA algorithm
step size
