GPS对抗技术研究

Research on GPS Countermeasure Technology

GPS干扰包括压制式和欺骗式。前者由干扰机发射某种干扰信号,以某种方式遮蔽敌方信号频谱,其对C/A码的干扰又分瞄准式、阻塞式和相关干扰。后者是发射与GPS信号具有相同参数的假信号,干扰GPS接收机,并使其产生错误的定位信息,包括产生式和转发式两种体制。GPS抗干扰技术主要有:时域滤波、频域滤波、空间滤波、零控制、轴向调零、空间波束转换、幅/相抵消、极化抗干扰等。

GPS jamming includes 2 kinds： blanket and deception. The former, its jamming equipment transmits some kind of jamming signals to shade spectrum of enemy signals by some way. Its disturbance to C/A code contains： aim jamming, barrage jamming and correlation jamming. The latter, its jamming equipment transmits dummy signals with the same parameters as GPS signal, mislead the GPS receiver to produce wrong place information, which includes 2 kind of modes： generating and transmitting. GPS anti-jamming technology mostly involves time domain filtering, frequency domain filtering, space domain filtering, zero control, axial zero alignment, space beam conversion, breadth/phase counteract, polarization anti-jamming and so on.