稳健的主模式抑制自适应波束形成算法

为了提高算法在各种信号环境下的鲁棒性,该文对主模式抑制算法的权值计算结构进行了详细分析,指出抑制系数对信号能量的保留作用有重要的影响。提出了一种对抑制系数的改进机制,利用改进后的算法计算的权值对信号能量的保留作用增强,提高了算法在高信噪比情况下的增益。实验结果表明:与传统算法相比,改进后的算法在保持了低信噪比稳健性的同时,其在强信号环境下的算法增益提高了若干dB,并且该算法在不同信号环境中,提高了信号失配的鲁棒性。

Robust dominant mode rejection adaptive beamforming algorithm

To improve the performance of phased array radar in different environments,the structure of the weighting computation was analyzed to show the importance of the rejection coefficient for signal component reversion.The signal components will be more effectively reversed,which will improve the algorithm gain.Simulation results show that the improved dominant mode rejection algorithm provides several more dB gain than conventional algorithms in high signal noise ratio environments and maintains as good performance as conventional algorithms in low signal noise ratio situation.The improved algorithm,which is more robust against signal mismatch,is suitable for practical application where the estimates of the signal direction and signal subspace dimension may be inaccurate.