天线组阵中SUMPLE算法的合成相位漂移补偿

针对SUMPLE算法在低信噪比时存在的相位漂移问题,在分析权值估计误差引起的合成信号相位漂移现象的基础上,提出一种以固定时刻合成权值作为参考的补偿算法。该算法以收敛后某个固定时刻的合成权值作为参考,其他时刻的相位补偿值通过与该参考权值进行相关计算得到。从理论上分析了该算法的可行性,并进行仿真验证。理论分析与仿真结果表明,所给出的相位补偿方法能有效地消除合成信号的相位漂移现象,补偿后的合成信号相位中心稳定。

Combining Phase Wandering Correction of SUMPLE Algorithm in Antenna Array

To solve the problem of phase drift at low SNR for SUMPLE algorithm,this paper proposes a compensation algorithm using fixed weight as a reference based on analysis of the phenomenon of phase drift caused by noise.The algorithm takes a fixed weight as reference signal after convergence and the phase drift value is computed by cross-correlation of other weights in iterations with the fixed reference weight.Validity of the proposed algorithm is analyzed and simulation is performed and the results show that the phase drift of the antenna array output can be effectively corrected and the phase of the array combining signal is steady.