基于LFM信号的分布式空间动平台定位技术  

Locating distributed moving space platforms based on LFM signals

作　　者：刘博宇 李陟[2] 杨于杰 李宏宇 史建华 LIU Boyu LI Zhi YANG Yujie(Beijing Institute of Radio Metrology and Measurement, , LI HongyuI , SHI Jianhua1 Beijing 100854, China Science and Technology Council of Defense Technology Academy, China Aerospace Science ~ Industry Corporation, Beijing 100854 , China)

机构地区：[1]北京无线电计量测试研究所,北京100854 [2]中国航天科工防御技术研究院科技委,北京100854

出　　处：《系统工程与电子技术》2017年第3期482-487,共6页Systems Engineering and Electronics

摘　　要：提出了一维测距结合二维测向的分布式空间动平台间相对定位方法。根据宽带正负斜率线性调频(linear frequency modulation,LFM)信号的时频特性,结合微波双向技术实现了动平台间的相对距离测量,并提出了测频率解相位模糊的短基线干涉仪高精度测向方法,解决了传统多基线干涉仪测角模型的概率性解模糊问题,同时对平台相对运动引起的多普勒干扰进行有效抑制。最终通过评估系统对该方法的定位精度进行了有效验证。A method combining distance and direction measurement which could realize relative location between moving space platforms is proposed. With the characteristic of wide-band chirp up and chirp down linear frequency modulation （LFM） signals, the distance is measured using the microwave two-way technology, the phase ambiguity while direction finding is solved through frequency measurement, and solved the ambiguity resolution probabilistic of the traditional multi-baseline interferometer angle measurement model, the Doppler Effect caused by relative movement is efficiently depressed also.The positioning accuracy is validated with the evaluation system.

关 键 词：分布式动平台 短基线干涉仪 定位 宽带正负斜率线性调频信号 测频解模糊 

分 类 号：TN911.7[电子电信—通信与信息系统]