摘要
通过将信号时域常模特性转化为频域常模,提出一种单载波系统频域常模盲均衡算法,解决了常模算法在频域中无法实现的问题。算法复杂度表明,该方案计算量明显低于宽带系统时域子空间分解方法,且相比于现有文献[6]中的单载波系统常模盲均衡算法,其复杂度也大为降低。文中,常模算法从时域到频域的转换是基于输出信号幅值收敛为1的特性而得,因此变换条件(8)成立,故而时域到频域的转换不会影响算法误差性能,仿真实验结果证明了这一点。
A novel approach of blind constant modulus algorithm （CMA） for single carrier frequency domain equalization is proposed to solve the application of CMA implemented in frequency domain, based on the constant modulus property from frequency domain to time domain. It is illustrated that this method has lower complexity than time-domain subspace algorithm has in broad wireless systems. And compared with the frequency-domain algorithm in[6] ,the complexity of the new idea is greatly reduced as well. In this research, the transformation of constant modulus algorithm from time domain to frequency domain is obtained under the assumption that the source signal amplitude remains 1. Therefore, the validity of equation （8）results in the conclusion that the performance of symbol error of the method would not be influenced by the transformation from time domain to frequency domain. Simulation results demonstrate it.
出处
《信号处理》
CSCD
北大核心
2009年第8期1242-1245,共4页
Journal of Signal Processing
基金
国家自然科学基金资助项目(60472104)
江苏省研究生创新计划(CX07B_106z)~~
关键词
单载波频域均衡
常数模算法
算法复杂度
离散傅氏变换
Single cartier frequency domain equalization
constant modulus algorithm
complexity
discrete Fourier transform
