CAJ | 학술논문

针对空间欠采样下多个LFM信号方位估计问题,提出了一种基于同时估计多实数的广义稳健中国剩余定理的方位解模糊方法. 研究了忽略信号交叉项影响所需的条件及利用广义稳健中国剩余定理对多个LFM信号方位解模糊的原理和方法. 仿真实例表明新提出在空间欠采样情况下对多个LFM信号目标同时解方位模糊的方法是有效的,方位估计的精度高,稳健性好.
침대공간흠채양하다개LFM신호방위고계문제,제출료일충기우동시고계다실수적엄의은건중국잉여정리적방위해모호방법. 연구료홀략신호교차항영향소수적조건급이용엄의은건중국잉여정리대다개LFM신호방위해모호적원리화방법. 방진실례표명신제출재공간흠채양정황하대다개LFM신호목표동시해방위모호적방법시유효적,방위고계적정도고,은건성호.
Aim. We propose a new approach to estimating DOAs( direction of arrivals) of multiple LFM signals with sub?Nyquist spatial sampling. Sections 1 through 3 explain our method of estimation mentioned in the title, which we believe is effective. In section 1,we analyze the process of estimating DOAs of multiple LFM signals with sub?Nyquist spatial sampling and obtain the condition for ignoring the effect of cross term. In section 2, we brief GRCRT ( Generalized Robust Chinese Remainder Theorem) for multiple numbers proposed by us in Ref.4. In section 3, we obtain ambiguous phase differences of multiple LFM signals from several pairs of array antennas with sub?Nyquist spatial sampling;then we apply GRCRT to estimating the real DOA of each LFM signal. Section 4 presents a nu?merical example;the simulation results, given in Figs. 2, and their analysis show preliminarily that our new ap?proach based on GRCRT for multiple numbers can indeed accurately and robustly estimate DOAs of multiple LFM signals.