同步信标在水下机动小目标轨迹测量中的高精度时延估计方法

A method of high precision time delay estimation in underwater moving mini-target tracking with synchronous beacon

摘要: 研究了使用窄脉宽、短周期、高频率的单频同步信标信号在水下机动小目标轨迹测量中的高精度时延估计方法。利用MATLAB进行了不同信噪比下时延估计效果的仿真,得出时延估计精度在不同信噪比下的误差曲线;结果表明,信噪比在20dB以上时,利用包络检波器进行时延估计,其精度优于10μs;而利用自适应相位估计来补偿粗测时延,可以得到优于0.1μs的测时精度。

Abstract: A method of high precision time delay estimation is studied by using narrow pulse width,short cycle,high frequency synchronous beacon signal in underwater moving mini-target tracking.Error curve of time delay estimation is presented with different SNR.The result of simulation shows that the accuracy of time delay estimation is higher than 10us by using envelope detector and higher than 0.1us by using self-adapting phase estimate to compensate the sketchy time delay survey for SNR larger than 20dB.