CAJ | 학술논문

在基于均匀线阵的MUSIC测向算法中，单元间距与波长之比大于0．5时，可能会出现虚假谱峰，干扰真实波达方向的判断。现有的一些消除虚假谱峰的方法多适用于主动测向或非均匀阵列，而对被动测向和均匀阵列无法适用。针对这一问题，本文通过分析虚假谱峰的出现原因，提出一种新的通过机械旋转进行虚假谱峰消除的方法——阵列旋转法，并仿真分析验证了该方法的有效性。该方法实现简单，适用范围广，能较好满足实际工程设计需求。
재기우균균선진적MUSIC측향산법중，단원간거여파장지비대우0．5시，가능회출현허가보봉，간우진실파체방향적판단。현유적일사소제허가보봉적방법다괄용우주동측향혹비균균진렬，이대피동측향화균균진렬무법괄용。침대저일문제，본문통과분석허가보봉적출현원인，제출일충신적통과궤계선전진행허가보봉소제적방법——진렬선전법，병방진분석험증료해방법적유효성。해방법실현간단，괄용범위엄，능교호만족실제공정설계수구。
In the MUSIC direction finding algorithm based on uniform linear array, when the ratio of the element spacing to wavelength is more than 0. 5, the spurious spectral peak may occur to interfere direction of real arrival estimation. The available methods of eliminating spurious spectral peak are mainly suitable for active direction find- ing or non-uniform array, not for passive direction finding and uniform array. Aiming at this issue, a novel method of eliminating spurious spectral peak （ array rotating method） by mechanical rotating after analyzing causes for occurrence of spurious spectral peak is presented. The simulated results show effectiveness of this method. The implementation of this method is simply, and it can be widely applied and meet real engineering design requirement.