针对弹载卫星导航接收机干扰方向测定的算法研究

在弹载应用中,卫星导航接收机动态范围大,干扰方向相对接收机变化迅速,高动态导致自适应抗干扰算法产生的零陷深度变浅、范围变大,同时破坏了零陷附近接收的卫星信号,严重影响了 自适应空时滤波的抗干扰性能.研究弹载卫星导航接收机干扰方向的测定方法,通过干扰测向将天线零陷对准干扰方向,在指定方向形成波束,从而提高了接收机的抗干扰...

Research on Jamming Direction Determination Algorithms for Missile-borne Satellite Navigation Receiver

In missile-borne applications, the satellite navigation receiver has a large dynamic range, and the jamming direction changes rapidly relative to the receiver. High dynamic results in shallower depth and larger null range of adaptive anti-jamming algorithm, which destroys the satellite signals received near the null and reduces the anti-jamming ability of adaptive space-time filtering. The measurement method of jamming direction of missile-borne satellite navigation receiver is studied. The nulls are accurately aligned with the jamming direction through jamming direction finding, and the anti-jamming ability of the receiver is improved by the beam in the specified jamming direction. According to the requirement of real time and accuracy of jamming direction measurement of satellite navigation receiver caused by missile-borne high dynamic, the MUSIC-ESPRIT joint algorithm is proposed. The measurement result of the traditional ESPRIT algorithm is used as the initial value of the MUSIC algorithm, thereby narrowing the search range of spectral peaks. The simulation results show that the proposed MUSIC-ESPRIT joint algorithm maintains high accuracy while reducing the amount of calculation, and meets the requirements of the missile-borne satellite navigation receiver for the determination of the jamming direction.