摘要
针对期望信号的实际方向与约束方向有误差这一问题,提出了信号子空间投影与非线性约束条件下最小化输出功率相结合的一种改进波束形成算法。该方法能缩小期望信号导向矢量的误差范围,避免导向矢量误差过大引起的波束形成算法性能下降,而且能使收敛速度更快,对信号导向矢量偏差较大的波束形成有很强的稳健性。
To overcome the signal direction mismatches, a modified algorithm for adaptive beamforming is presented, which is based on the eigenspace and non-linearly constrained minimum power algorithm. The proposed algorittun improves the accuracy of steering vector to avoid the descent of performance, offeres faster convergence rate, provides a sufficient robustness against large mismatches.
出处
《电子信息对抗技术》
2011年第6期18-21,26,共5页
Electronic Information Warfare Technology
关键词
自适应波束形成
信号导向矢量偏差
特征空间
变步长
adaptive beamforming
signal steering vector mismatches
eigenspace
variable step size
