一种改进的逐次递推解模糊方法

An Improved Successive Ambiguity-Resolving Method for Interferometer

针对通道相位噪声较大条件下干涉仪测角算法存在解模糊出错的问题,提出了一种基于相位差矢量平均的逐次递推解模糊改进方法.该方法通过对多次测量的各级相位差测量值进行矢量平均,利用矢量平均后的相位差估计值进行逐次递推解模糊测角运算.通过矢量平均降低通道间相位噪声的影响,提高解模糊过程中各级相位差的估计精度,从而达到即使在通道相位噪声较高的条件下也能够正确解模糊.计算机仿真结果验证了该算法的有效性.

To deal with the issue of error ambiguity-resolving under high phase noisy circumstance in multi-baseline phase interferometer, this paper presents an improved algorithm of successive recursive ambiguity-resolving based on the vector average filtering of phase-difference. The proposed method calculates the vector average values of the multi-point phase-difference. The impact of phase noise on ambiguity-resolving is reduced by averaging vectors between channels so as to improve the accuracy of phase ambiguity estimation at all levels. The correct ambiguityresolving could be achieved even in higher phase noise conditions. The computer simulation results demonstrate the merits of presented algorithm.