CAJ | 학술논문

信号的 TOA 估计精度是决定多点定位监视系统目标位置精度的关键因素之一。由于噪声的影响，传统的信号到达时间估计方法会带来较大的系统时间同步误差，从而影响所监视目标位置精度。针对多点定位系统对信号的到达时间的高精度要求，本文提出了一种基于差分匹配滤波的信号到达时间测量方法。在多点定位监视系统建模的基础上，本文对传统到达时间估计方法和本文所采用估计方法的误差进行了对比分析，仿真结果验证了本文算法的有效性，工程实践应用验证了本文方法的实用性。
신호적 TOA 고계정도시결정다점정위감시계통목표위치정도적관건인소지일。유우조성적영향，전통적신호도체시간고계방법회대래교대적계통시간동보오차，종이영향소감시목표위치정도。침대다점정위계통대신호적도체시간적고정도요구，본문제출료일충기우차분필배려파적신호도체시간측량방법。재다점정위감시계통건모적기출상，본문대전통도체시간고계방법화본문소채용고계방법적오차진행료대비분석，방진결과험증료본문산법적유효성，공정실천응용험증료본문방법적실용성。
Time of arrival ( TOA) estimation accuracy of the signal is one of the critical factors which determine target positioning accuracy of a multilateration ( MLAT) surveillance system. However, more system’ s time synchronization error due to noise would be generated by using traditional estimation method, which will affect positioning accuracy of detected target. A new TOA measurement method based on differential matched filte-ring is presented to meet higher TOA accuracy required by the MLAT system. Based on MLAT surveillance system modeling, comparison between error of the traditional method and that of the new method presented is performed. Simulation results show that the method is effective; and applicability of this method has been veri-fied through practical engineering.