基于最大似然的GPS转发式干扰信号估计方法

Research of GPS Repeater Jamming Estimation Based on Maximum Likelihood Estimation

估计GPS接收机的转发式干扰,对抗干扰研究具有重要意义。利用多径估计理论,提出了一种新的基于最大似然估计的GPS转发式干扰信号估计技术。阐述了转发式干扰的原理,建立了GPS接收机对转发式干扰信号相干积分累加的数学模型,推导了转发式干扰最大似然估计的计算公式。仿真实验表明:该技术可以在有色噪声条件下,对多个转发式信号进行较精确的估计。

Research of GPS repeater jamming estimation plays an important role in modern military affairs. Making use of the theory of muhipath estimation, a new method based on maximum likelihood estimation （MLE） to estimate transmission jamming signal is put forward. The theory of repeater jamming is explained. The mathematic model of coherent integration for repeater jamming signal is set up. The calculation functions of maximum likelihood estimation （MLE） to estimate repeater jamming signal are deduced. Experimental results show that the method can make the precise estimation of repeater jamming signal with color noise channel.