一种多点定位抗多径TOA估计方法  

A Method of TOA Estimation for Multilateration With Multipath Suppression Performance

作　　者：欧阳成 徐敏 顾杰 OUYANG Cheng;XU Min;GU Jie(Science and Technology on Electronic Information Control Laboratory,Chengdu 610036,China)

机构地区：[1]电子信息控制重点实验室,成都610036

出　　处：《电子信息对抗技术》2020年第3期18-23,共6页Electronic Information Warfare Technology

摘　　要：针对传统多点定位TOA估计方法在多径环境下的精度下降问题,提出一种改进算法。首先,在先解码并重构模板的基础上引入自适应滤波器对多径参数进行估计,从而提高TOA估计精度;其次,提出一种改进的匹配滤波模板,其自相关函数的主副瓣比更高,因此在模式判断与TOA粗估计时具有更强的鲁棒性。实验结果表明,改进算法在多径环境下的TOA估计精度优于传统算法,具有良好的工程应用前景。To solve the problem that the accuracy of the traditional Time of Arrival(TOA)estimation method for multilateration is decreased with multipath interference, an improved algorithm is proposed. Firstly, an adaptive filter for multipath suppression is proposed to improve the accuracy of TOA estimation, based on the matching template reconstructed after decoding signals of mode S. Secondly, an improved matching template with higher main side lobe ratio is proposed to enhance the robustness in mode judgment and TOA coarse estimation. The simulation results show that the TOA estimation accuracy of the improved algorithm in multipath environment is superior to that of the traditional method, implying good application prospect.

关 键 词：多点定位 S模式 TOA估计 多径抑制 

分 类 号：TN971.1[电子电信—信号与信息处理]