基于指数遗忘分布的瞬时频率估计算法

本文提出了基于指数遗忘分布的信号瞬时频率估计算法.与其他的时频分布算法相比,通过采用单边指数分析窗口,指数遗忘分布可以在时频分析中引入迭代算法从而大大提高计算效率,本文对这一算法的性能进行了理论分析,同时其有效性在相应的仿真试验中得到了证明.

Hybrid Genetic Algorithm for Optimal Design of Clutter Rejection Filter and Its Astringency Analysis

The optimal stagger time-variant MTI filter is an effective method to detect weak target in strong moving clutters and alleviate the blind speed problem.Selecting the suitable stagger-code to make the nadir as low as possible can efficiently suppress clutters while avoiding the loss of the weak target in it.The paper presents a hybrid genetic algorithm (HGA) based on gradient to select the optimal stagger-code.A further result on the Markov chain model of HGA shows that it is a global stochastic searching method and can converge with probability one.Compared with standard genetic algorithm (SGA),HGA has low complexity and requires small population size.We apply it in the area of metric-wave radar.The simulation experiments and performance demonstrate that the design method of clutter resistance filter based on HGA is feasible and valid.