CAJ | 학술논문

针对GPS导航信号由于天线震动和城区干扰源较多的情况下,干扰信号会对导航信号的高精度定位产生很大的影响. 提出了一种基于有色载入的自适应调零天线抗干扰算法. 该算法利用滤波器权值矢量和方向矢量构建有色修正矩阵,并通过该修正矩阵得到滤波权值. 从波束形成、失配情况和不同快拍数下的算法性能等三方面进行仿真分析比较,仿真结果表明文中所提出的方法可以得到加宽、加深的零陷,使干扰信号在角度偏移时,也能得到较好抑制. 在相同的快拍数下信干噪比更好,具有一定的实用价值.
침대GPS도항신호유우천선진동화성구간우원교다적정황하,간우신호회대도항신호적고정도정위산생흔대적영향. 제출료일충기우유색재입적자괄응조령천선항간우산법. 해산법이용려파기권치시량화방향시량구건유색수정구진,병통과해수정구진득도려파권치. 종파속형성、실배정황화불동쾌박수하적산법성능등삼방면진행방진분석비교,방진결과표명문중소제출적방법가이득도가관、가심적령함,사간우신호재각도편이시,야능득도교호억제. 재상동적쾌박수하신간조비경호,구유일정적실용개치.
Solving the problem of jamming signals exerts great influence on preserving high precision of GPS navi?gation signals despite antenna vibration and a variety of jamming sources. We present an anti?jamming algorithm for adaptive nulling antenna based on colored loading. The algorithm constructs the colored correction matrix with array vector and direction vector and gets the final filter weights through the correction matrix. We analyze three aspects of algorithm performance:beamforming, mismatch and different numbers of snapshots. The simulation results and their analysis show preliminarily that the method can obtain wider and deeper null, even when jamming signal has angle deviation and can still get better suppression. It gets better output SINR with the same snapshots.