强干扰下几乎循环平稳正弦信号LSFD估计  

Almost Cyclostationary Weaken Signal LSFD Estimating Under Stronger Interference

作　　者：余国文[1] 王宏远[1] 

机构地区：[1]华中科技大学数字视频与通信中心,湖北武汉430074

出　　处：《电子学报》2006年第6期1008-1011,共4页Acta Electronica Sinica

摘　　要：强干扰和低信噪比环境下,根据接收信号循环平稳特性,本文提出一种基于周期时间平均的正弦信号检测和频率线性估计算法(LSFD),可以准确估计信号频率,有效抑制干扰和噪声,且具有盲性.计算机仿真结果证明了LSFD算法的正确性,其弱信号检测性能优于FFT算法,收敛速度优于循环相关系数算法.A novel weaken signal detecting and frequency estimating blindly algorithm （LSFD） based on periodtime-average is proposed according to the cyclostationary under stronger interference. LSFD algorithm can estimate signal frequency correctly, and restrict interference and noise effectively than FFF. The analysis and simulation results show that LSFD algorithm is blindly, and faster than correlation method.

关 键 词：色噪声 几乎循环平稳 周期时间平均 循环频率 渐进收敛 

分 类 号：TN929.533[电子电信—通信与信息系统]