CAJ | 학술논문

在高动态环境中，由于干扰来向在短时间内的剧烈变化，利用接收数据协方差矩阵的常规卫星导航干扰抑制算法失效。为了解决快拍数据不足的问题，该文提出一种仅利用少快拍数据的卫星导航高动态干扰抑制算法。首先，通过利用干扰信号空间谱的稀疏特性，仅用少数快拍甚至一个快拍来估计干扰来向；然后，利用估计的干扰来向构造干扰子空间，并通过正交子空间投影算法抑制干扰。仿真实验验证了该算法的有效性。
재고동태배경중，유우간우래향재단시간내적극렬변화，이용접수수거협방차구진적상규위성도항간우억제산법실효。위료해결쾌박수거불족적문제，해문제출일충부이용소쾌박수거적위성도항고동태간우억제산법。수선，통과이용간우신호공간보적희소특성，부용소수쾌박심지일개쾌박래고계간우래향；연후，이용고계적간우래향구조간우자공간，병통과정교자공간투영산법억제간우。방진실험험증료해산법적유효성。
In high dynamic environment, the conventional interference suppression algorithms based on covariance matrix are ineffective because of the dramatic change of interference Direction Of Arrival (DOA) in consecutive snapshots. In this paper, a high dynamic interference suppression algorithm with few snapshots for satellite navigation system is proposed to solve the problem of snapshot deficiency. By utilizing the sparse property of spatial spectrum, the DOAs of interferences are estimated by using few snapshots, even only one snapshot. Then the interference subspace is formed based on the estimated DOAs, and orthogonal subspace projection algorithm is used to suppress interference. Simulations demonstrate the effectiveness of the proposed algorithm.