摘要
针对色噪声环境下的阵列幅相误差自校正问题,提出一种适合任意阵列的幅相误差自校正算法。该算法首先在每次迭代开始前利用H∞滤波方法得到稳健的DOA估计值,然后给出一种幅相误差最优初始值的估计方法求解出幅相误差的次优解,最后基于交替加权最小二乘算法,分别对幅相误差和噪声功率进行估计。理论和仿真实验均表明该算法不仅迭代次数少,且具有较好的参数估计性能。
A novel algorithm that can calibrate array gain and phase error in the colored noise fields for arbitrary array is proposed.Based on weighted alternating least squares algorithm,this algorithm solves for gain and phase error and colored noise powers.Then by H∞ filtering technique and weighted subspace fitting,it achieves the estimation of DOA.A new method that can give an optimal initial value of gain and phase is also presented,which reduces the number of iterations.Simulation results demonstrate the validity of this new algorithm.
出处
《电子信息对抗技术》
2011年第4期9-13,36,共6页
Electronic Information Warfare Technology
基金
国家863项目(2009AA7034530)
关键词
波达方向
色噪声
幅相误差
自校正
DOA
colored noise
gain and phase error
self-calibration
