宽带噪声干扰对M码接收机的影响分析

Analysis and Simulation of the Effects of Broadband Noise Interference on GPS M Code Receiver

在介绍M码信号的特点和接收原理的基础上,根据载波跟踪环的门限所确定的等效载噪比建立了宽带噪声干扰下的M码信号模型,从而分析得到干扰有效时的最小入射功率。通过建立干扰信号链路方程得出干扰源距离与干扰功率的关系,最后进行了仿真验证表明宽带噪声干扰对M码信号是一种有效的干扰方式。

Introducing characteristics and the receiving principle of M code signal,based on equivalent carrier-power-to-noise density ratio restricted by the threshold values of carrier tracking loop,M code model influenced by broadband noise interference is founded.Meanwhile,the minimum interference power of incidence is analyzed when interference is effective.According to building interference signal link formula,the relationship between interference range and interference power is obtained.Finally simulation result is provided to verify and shows broadband noise interference is a effective interference mode.