A new arithmetic using relativity to judge array ambiguity is introduced.The shortage of equational arithmetic when array is complex and arithmetic of searching the spectrum peaks is conquered.

• 提出了一种利用方向矢量间相关性判断阵列模糊的算法，克服了方程组法不适合判断复杂阵列模糊以及谱峰搜索法计算量大的不足。