一种相关干涉仪测向算法的快速实现

A Fast Implementation of Correlative Interferometry for Direction-Finding

摘要: 相关干涉仪是当前最常用的测向体制之一。传统相关干涉仪测向算法需要将测量的相位差与样本库中的所有相位差进行相关运算，计算量较大，在需要对信号进行快速测向的场景下，测向效率有时难以令人满意。针对此问题，本文提出一种相关干涉仪测向算法的快速实现方法，基于前后两次测量相位差之间的相关系数，缩小样本库中可用样本的个数，可有效减少相关运算次数。仿真结果验证了该方法相比传统算法减小了相关计算所需时间，提高了测向效率。

Abstract: As one of the most widely adopted direction-finding (DF) techniques, correlative interferometry (CI) suffers from its efficiency problem occasionally, especially when DF results are required in real time, since the original CI method is based on massive computation of vector correlations. Herein a fast implementation of the CI technique is proposed. Based on the correlation coefficient of the sequential measured phase errors, the implementation reduces the range of available samples and cuts the number of computation of correlations down. Simulations have demonstrated the efficacy of the proposed method over the original one.