基于自相关算法的 TOA 估计方法研究

摘要

The estimation of time of arrival (TOA)of impulse signal is the key point for detection and interception of burst and non -cooperative communication signals,and it is very important for communication countermeasure.Based on a introduction of the AC -TOA,a detailed discussion about the threshold setting of AC -TOA in low SNR is presented,by using the method of double threshold,the improvement to the threshold setting is conducted.Finally,the performance of the algorithms is verified by computer simulation.%TOA（脉冲到达时间）估计是检测和截获非合作突发通信信号的关键，在通信对抗中至关重要。在介绍基于自相关（AC）算法 TOA 估计原理的基础上，讨论了在低信噪比情况下自相关算法的门限设置问题。采用双门限方法对门限设置进行了改进，并通过计算机进行了仿真分析和验证。