卫星GPS地质勘探目标定位信号检测仿真

摘要

This paper presents a detection method for target positioning signal of satellite GPS geological exploration based on Duffing,Firstly,the GPS target location signal of transmitting terminal in wireless sensor network is calculated.At signal receiving terminal of GPS target location,the mixing down-conversion operation for received GPS target location signal is carried out,and basic equation and state equation of GPS location signal and corresponding Jacobian matrix are calculated.Thus,the detection of satellite GPS geological exploration target location signal through detection of change of system state is realized.Simulation result shows that the proposed method has better detection performance relative to comparison methods.It improves success rate of detection.%对卫星GPS地质勘探目标定位信号的检测,能够有效提高地质勘探过程信号检测效率.对卫星GPS目标信号的检测,需要对信号进行变频运算,得到定位信号的基本方程和状态方程,完成对目标信号的检测.传统方法将目标信号分解为多个模态函数和趋势分量,将其转化为具有不同尺度特征的平稳分量,但忽略了得到定位信号的状态方程,导致检测精度偏低.提出基于Duffing的卫星GPS地质勘探目标定位信号检测检测方法,首先计算无线传感网络发射端的GPS目标定位信号,在GPS目标定位信号接收端,对接收到的GPS目标定位信号进行混频下变频运算,计算GPS定位信号的基本方程和状态方程,以及其对应的Jacobian矩阵;然后通过对系统状态改变的检测实现对卫星GPS地质勘探目标定位信号的检测.仿真测试结果表明,所提方法相比于对比方法具有更好地检测性能,提高了检测成功率.