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当快拍数较少和存在系统误差时，自适应波束形成性能急剧下降，特别是当输入信噪比较大时，会出现严重的信号相消现象．文中利用时域信息提出一种新的自适应波束形成方法，理论分析表明，该方法为目标多普勒频率已知条件下最大似然估计结果．该方法能有效地克服信号相消现象，并且具有良好的波束保形能力和快速收敛特点，计算机仿真结果验证了这些优点
When the number of snapshots is small and there is systematic error, the performance of adaptive beamforming decreases sharply, especially when the input signal-to-noise ratio is large, and there will be serious signal cancellation. In this paper, a new adaptive beamforming method is proposed using time-domain information. Theoretical analysis shows that this method is the result of maximum likelihood estimation under the known condition of target Doppler frequency. The proposed method can effectively overcome the signal cancellation phenomenon, and has good beamforming capability and fast convergence characteristics. Computer simulation results verify these advantages