摘要
方位超分辨一直是雷达领域里广泛关注的研究课题,针对扫描雷达目标方位角分辨问题,利用阵列信号处理理论中的DOA估计算法进行研究,将雷达目标方位回波模型转化为基于天线方向图调制的均匀线阵模型,在目标后向散射幅度相干的前提下,利用最大似然法进行求解,针对对数似然函数最大值问题,利用遗传算法进行求解。仿真结果表明,高信噪比情况下,分辨能力良好,同时适用于低信噪比情况下的目标分辨,验证了算法的可行性。
Azimuth super resolution has always been a hot research topic in radar domain. For azimuth resolution of scanning radar problem,the DOA estimation algorithm of array signal processing theory is used. the radar azimuth echo model is converted into uniform linear array model which is modulated by antenna pattern. Under the premise of coherent backscatter amplitude of target,the maximum likelihood method is used to resolved super resolution problem,for the log-likelihood function,the genetic algorithm is used to solve it. Simulation results show that,its resolution responsibility is good in high SNR,and it can be applied to target resolution in low SNR,which verifies the feasibility of the algorithm.
出处
《指挥控制与仿真》
2015年第6期105-108,共4页
Command Control & Simulation
基金
国家自然科学基金(61471379)
关键词
扫描雷达
阵列信号
超分辨
方位角
相干
scanning radar
array signal
super resolution
azimuth
coherent
