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网络脉冲信号的准确定位能够提高光纤激光传感网络的性能,当前方法由于多脉冲信道存在着噪声干扰、非视距传播、多址干扰等因素的影响,被动定位精准度较低,为此提出了基于时间测量值的光纤激光传感网络脉冲信号被动定位方法。首先融合于卡尔曼滤波理论估计出网络脉冲信号抵达的初始时间差,利用修正滤波器对网络信道初始脉冲冲击响应函数进行修正,然后排除光纤激光传感网络NLOS误差,通过2个接收机对网络移动台进行二维定位,完成了对光纤激光传感网络脉冲信号被动定位,实验结果表明,该方法可以精确地对光纤激光传感网络脉冲信号进行准确快速的定位。
Accurate positioning of network pulse signals can improve the performance of fiber laser sensor networks. In the current method, due to the existence of noise interference, non-line-of-sight propagation and multiple access interference in multi-pulse channels, the passive positioning accuracy is low. The pulse signal passive positioning method based on time measurement of fiber laser sensor network. Firstly, the Kalman filter theory is used to estimate the initial time difference of arrival of the network pulse signal. The initial impulse response function of the network channel is corrected by a correction filter, and then the NLOS error of the fiber laser sensor network is excluded. The experiment results show that this method can precisely and quickly locate the pulse signal of fiber laser sensor network.