CAJ | 학술논문

针对传统测向方法实际应用性能较差的问题，提出了一种基于压缩感知的卫星干扰源定位方法。根据干扰信号方位角的空间稀疏性，建立了波达方向( DOA)估计模型，构造出基于阵列流型的过完备原子库和随机单位向量测量矩阵，最后结合信源估计技术和正交匹配追踪( OMP )算法实现干扰目标的方位估计。仿真验证了该方法能同时估计相干干扰信号的强度和角度，适合快速变化的干扰目标定位，并且具有较低的计算复杂度和更好的工程易用性。相关研究对压缩感知理论在卫星干扰源定位中的应用具有一定参考意义。
침대전통측향방법실제응용성능교차적문제，제출료일충기우압축감지적위성간우원정위방법。근거간우신호방위각적공간희소성，건립료파체방향( DOA)고계모형，구조출기우진렬류형적과완비원자고화수궤단위향량측량구진，최후결합신원고계기술화정교필배추종( OMP )산법실현간우목표적방위고계。방진험증료해방법능동시고계상간간우신호적강도화각도，괄합쾌속변화적간우목표정위，병차구유교저적계산복잡도화경호적공정역용성。상관연구대압축감지이론재위성간우원정위중적응용구유일정삼고의의。
The conventional direction finding methods have poor performance in the actual application. A satellite interference localization method based on the compressive sensing( CS) theory is proposed. Based on the interference signal angle’s sparseness in angle space,the corresponding direction of arrival( DOA) model,and the over-complete dictionary of atoms and measuring matrix by randomly sampling unit vector are constructed. Combined with the source estimation technology,the estimation using orthogonal matching pursuit( OMP) algorithm is obtained. The simulation results show that the method can estimate simultane-ously the coherent signal amplitude and bearing and is suitable for the rapidly moving interference targets. It has smaller computational load and better engineering usability. Research in this paper promotes the ap-plication of compressive sensing in satellite interference localization.