| 摘要: |
| 针对海上试验靶场各类飞行器的快速搜索及落点精确测量需求，提出了一种基于脉冲编码调制-调频（Pulse-Code Modulation Frequency-Modulation，PCM-FM）信号的海上动平台多站时差定位方法，构建了海上动平台多站时差定位系统架构。通过载波平滑伪距+扼流环多径抑制技术解决海上动平台条件下站间高精度时间同步，基于常数模算法的盲均衡技术解决海上多径环境下遥测信号码间串扰，通过遥测帧多符号平滑处理降低时差测量抖动误差，最后基于高斯-牛顿迭代最小二乘法实现多站实时高精度时差定位。仿真及飞行试验结果表明，该方法在动平台条件下定位精度优于100 m，可满足海上靶场目标定位精度需求，为未来海上靶场目标回收及装备鉴定的高精度测量系统建设提供了工程参考及设计依据。 |
| 关键词: 海上动平台；海上靶场 PCM-FM信号；时差定位 |
| DOI：10.20079/j.issn.1001-893x.241220001 |
|
| 基金项目:国家自然科学基金资助项目（62203458） |
|
| Multi-station Time Difference of Arrival LocationBased on PCM-FM Signal for Maritime Mobile Platform |
| YANG Junwei,ZHANG Xu,WANG Jiongqi,GAO Mengyao |
| (1.Southwest China Institute of Electronic Technology,Chengdu 610036,China;2.College of Science,National University of Defense Technology,Changsha 410073,China;3.Unit 63795 of PLA,Xi’an 710600,China) |
| Abstract: |
| To address the requirements of rapid search and precise measurement of landing points for various aircrafts in the maritime test range,a multi-station time difference of arrival(TDOA) location method based on pulse-code modulation frequency-modulation(PCM-FM) signal for maritime mobile platform is proposed.The architecture of multi-station time difference location system on maritime mobile platforms is constructed.Through carrier-smoothed pseudo-range technology combined with cascaded ring for multipath suppression,high-precision station-to-station time synchronization is achieved in maritime mobile platform environment.Blind equalization technology based on the constant modulus algorithm is employed to effectively address inter-symbol interference of telemetry signal in maritime multipath environment.Telemetry frame multi-symbol smooth method is utilized to minimize TDOA measurement jitter error.Finally,the Gauss-Newton iterative least squares method is proposed for real-time high-precision TDOA location.The simulation and flight test results show that the location accuracy is better than 100 m for maritime mobile platform,and can satisfy the target location requirement of the maritime test range.The proposed method can provide engineering reference and design basis for the construction of high-precision measurement system for target recovery and equiment identification in future maritime test range. |
| Key words: maritime mobile platform maritime test range PCM-FM signal time difference of arrival location |
