基于多站超宽带雷达的穿墙目标精确定位技术

项目名称： 基于多站超宽带雷达的穿墙目标精确定位技术

项目编号： No.61201331

项目类型： 青年科学基金项目

立项/批准年度： 2013

项目学科： 电子学与信息系统

项目作者： 丁宏

作者单位： 中国人民解放军国防科学技术大学

项目金额： 25万元

中文摘要： 本项目将在分析超宽带窄脉冲信号穿墙传播特性基础上，建立其穿墙传播模型，而后基于墙壁的影响和传播模型设计高精度测距方法，最后基于多站超宽带雷达体制完成目标位置的精确估计。 首先深入分析穿墙传播时发生的信号衰减、失真等效应，并解算穿墙传播时的多次折射和反射路径，建立收发站与目标间信号传输模型。针对穿墙探测室内非合作目标应用中信号传播路径的特殊性，从分析穿墙环境下测距问题入手，建立考虑墙体后的接收信号模型，并利用墙壁特性和多径效应设计到达时间估计新方法。为消除穿墙传播引入的定位误差，将结合接收信号强度和时延误差分布信息融合各接收站测量结果，建立适用于穿墙非合作目标定位的等波程线交叉定位模型，实现对非合作目标位置的精确估计。 本项目将在上述方面开展创新研究，为解决穿墙非合作目标定位提供支撑，进一步发展和完善超宽带无线定位技术的理论和方法体系，为该技术的广泛应用奠定坚实基础。

中文关键词： 穿墙超宽带定位；多站雷达；到达时间；穿墙；非视距

英文摘要： This project will analyze the through-wall propagation characteristics of UWB impulse signal, construct the corresponding propagation model and design new high-precision ranging methods based on the characteristics and model. Finally, we will propose novel position estimation methods when using multistatic UWB radar. Firstly, the project will study the characteristics of impulse signal attenuation and distortion and solve the reflection and refraction paths when the impulse signal propagates through the wall. We will then construct the special UWB propagation model between the transceiver and the target. Secondly, considering the special propagation path of through-wall target exploration, the problem of through-wall ranging will be studied and the model of received signal will also be set up. The project will design new TOA estimation methods using the through-wall propagation characteristics and multipath models of UWB impulse signal. At last, in order to mitigate the position error caused by through-wall propagation, TOA estimations are fused for localization based on the received signal intensity and distribution of TOA estimation error. Quite different from common positioning methods, a novel equal-wave path crossing-location model is constructed to estimate the position of the noncooperative target. The p

英文关键词： UWB localization；multistatic radar；time of arrival(TOA)；through wall；non line of sight(NLOS)