一种新的相干信号波束形成方法

A New Beamformer for Coherent Signals

存在相干信号情况下的常规波束形成器,由于相干信号的相对信号强度估计误差、天线阵导向矢量扰动误差和采样协方差矩阵估计误差的存在,会产生波束畸变及信号相消,输出信干噪比会明显下降。该文提出一种基于量子信号处理中内积成形算法的波束形成器,并分析了波束形成器的性能,通过仿真比较验证了新的波束形成器的有效性。分析和实验表明,新波束形成器作为一种鲁棒性波束形成器,在上述应用环境中,通过适当调整影响因子,可以得到比传统波束形成器更稳定的性能输出。

In the process of the beamforming for the coherent signals, because of the estimation error of the coherent signal energy and the estimation error of covariance matrix R, and perturbation error on the steering vector, the output SINR of beamformer drops badly. In this paper a new beamformer is presented based on the LS shaping from quantum signal processing. As a robust beamformer it shows the good performance in the circumstance discussed above. Analysis and simulations are given to prove the efficiency and validity of the new beamformer.