一种利用相位差变化率的机载单站无源定位方法  

An Airborne Single Observer Passive Location Using Phase Difference Rate-of-Change

作　　者：李望西[1] 黄长强[1] 王勇[1] 王治军 

机构地区：[1]空军工程大学工程学院,西安710038 [2]解放军95739部队装备部,云南红河661100

出　　处：《电讯技术》2012年第1期13-17,共5页Telecommunication Engineering

基　　金：军内重点项目(KJ2010146);空军工程大学研究生创新计划(DX2010108)~~

摘　　要：利用空频域信息的无源定位对角速度测量要求较高,分析相位差变化率模型可知相位差变化率对角速度具有明显的放大作用,将其应用于机载单站无源定位,建立新的无源测距模型并进行误差分析。仿真实验表明:该方法减小了参数测量难度,定位误差主要受相位差变化率和频率变化率影响,并随载机和目标相对速度的增大而减小,与原方法相比具有更好的定位精度。The passive location by using spatial-frequency domain information makes high demand for measurement precision of angular velocity. Analysis of phase difference rate-of-change model indicates that phase difference rate-of-change can obviously magnify angular velocity. This characteristic is applied to airborne single observer passive location, and a new passive location model is built and error analysis is made. The simulation shows that this method reduces the difficulties of parameter measurement. The ranging error is mainly affected by the measurement error of phase difference rate-of-change and Doppler frequency rate-of-change, and it reduces with the increase of relative velocity between observer fighter and target. Compared with former method, it has higher passive location precision.

关 键 词：机载单站无源定位 测距误差 定位精度几何分布 相位差变化率 角速度 

分 类 号：TN957[电子电信—信号与信息处理]