基于时延的宽带LFM信号DOA估计算法

摘要

As the traditional DOA estimation algorithm of wideband LFM signal has the weakness of large sampling value and caculating amount, a wideband LFM signal DOA estimation algorithm based on time-delay is proposed in this paper. Firstl, the signals received by the array are transformed into frequency domain. Then, the time-delay between the baseline is estimated using the extreme frequency point and the weighted mean is got. The DOA estimation of wideband LFM signal is got through the time-delay. Its effectiveness and correctness are verified by computer simulations at last.%针对常用宽带LFM信号DOA估计算法采样数据量大、运算量大的特点,提出了一种基于时延的宽带LFM信号DOA估计算法.先把阵元接收到的信号变换到频域,而后用极值频率点进行时延估计,并对各极值频率点的时延估计值进行加权平均,进而估计出宽带LFM信号的来波方位.仿真验证了该算法的合理性和有效性.