CAJ | 학술논문

针对自适应波束形成器在干扰位置出现扰动时的输出性能下降问题，该文提出一种新的零陷展宽算法。该算法基于投影变换与对角加载技术的结合，首先利用投影变换技术对阵列接收数据进行预处理，结合对角加载技术，以此构造出一个新的协方差矩阵替代原来的协方差矩阵，再利用自适应波束形成技术得到零陷展宽后的波束图。仿真结果表明，该方法能有效展宽波束零陷宽度，加深零陷深度，达到抑制位置出现扰动的强干扰信号目的。该算法易于求解，对参数的选取具有较强稳健性，在低快拍条件下，依然能有效地工作，增强了自适应波束形成器稳定性。
침대자괄응파속형성기재간우위치출현우동시적수출성능하강문제，해문제출일충신적령함전관산법。해산법기우투영변환여대각가재기술적결합，수선이용투영변환기술대진렬접수수거진행예처리，결합대각가재기술，이차구조출일개신적협방차구진체대원래적협방차구진，재이용자괄응파속형성기술득도령함전관후적파속도。방진결과표명，해방법능유효전관파속령함관도，가심령함심도，체도억제위치출현우동적강간우신호목적。해산법역우구해，대삼수적선취구유교강은건성，재저쾌박조건하，의연능유효지공작，증강료자괄응파속형성기은정성。
Since the adaptive beamformer suffers from the output performance degradation when the position of the interference moves, a new null broadening technique is proposed. The algorithm uses the projection technology to transform the array receives data, combined with diagonal loading techniques to get the new covariance matrix. The original covariance matrix is replaced by a new covariance matrix as such, and then a null broadening beam can be obtained using the adaptive beamforming technique. The simulations results show that this method can effectively broadening the beam null width and enhance the null depth, so the new algorithm can suppress strong interference with rapid movement;and the algorithm is easy processing, which can still work effectively even in the condition of low snapshot, the algorithm enhanced robustness of the beamformer.