自适应频移滤波器的优化设计与实现  

Optimal Design of Adaptive Frequency-Shift Filter and Implementation

作　　者：曹晶[1] 宋铁成[1] 沈连丰[1] 

机构地区：[1]东南大学移动通信国家重点实验室,江苏南京210096

出　　处：《电气电子教学学报》2008年第4期39-43,共5页Journal of Electrical and Electronic Education

摘　　要：本文利用信号的循环平稳性研究分离频谱重叠信号的频移滤波器。通过对循环平稳性和频谱相关性的分析,设计了一种频移滤波器,并采用变步长LMS(Least Mean Square)自适应算法计算多个频移分量的最优权值系数。仿真结果表明,该算法可有效分离频谱重叠信号,效果远好于传统滤波器。最后,在DSP平台上实现了设计的频移滤波器。The frequency shift filter about separating overlapping signals using the cyclostationary of signals is studied . Then a kind of frequency shift filter is designed through the analysis of cyclostationary and frequency spectrum correlation. The coefficients of filter is updated using the algorithm of variable step- adaptive. Simulation results indicate that this algorithm can efficiently separate overlapping signals and the results are more better than the traditional filter. Finally this frequency shift filter is implemented on DSP platform.

关 键 词：循环平稳 频移滤波器 LMS DSP 

分 类 号：TN713[电子电信—电路与系统]