GPS/INS超紧致耦合压制干扰能力分析

GPS/INS超紧致耦合；GPS军码接收机；压制干扰；信号参数优化；失锁干扰功率；有效干扰范围

Capability analysis of blanket jamming to GPS/INS ultra-tight coupling

Band-limited Gaussian noise and pseudo code with the same rate signal are adopted to actualize blanket jamming to GPS military receiver of GPS/INS ultra-tight coupling navigation system.According to GPS P(Y) code and M code signal power spectrum change characteristic, above-mentioned two jamming signal parameters are optimized, the minimum jamming power causing GPS military receiver phase-locked loop(PLL) lock-lose is calculated on the receiver RF front-end. Then,in consideration of the relationship between jamming signal orientation and GPS receiver antenna gain, the curve between effective jamming range and transmitting power of jammer is obtained under different liftoff height. According to protective requirement of key targets, requisite uninterrupted blanket jamming effect distance to different type guided weapon is analyzed quantitatively,and location and number setting problem of multiple jammers deployed on the following path two-side are modeled and solved.