摘要
针对动态场景下,多观测站编队对地表辐射源时差、频差高精度测量和定位的全流程地面内场测试验证难题,提出了一种多站时频差定位系统半实物测试方法。多站编队时频差定位系统与动态场景模拟器、捷变信号发生器、原子钟和系统地检等辅助设备在统一的时频基准和控制指令下协同工作,实现对多站时频差定位系统实装后所面临的时差、频差时变性环境和站间时间同步、频率相参约束条件进行全流程逼真模拟及测试验证。试验结果表明:时差测量精度优于10 ns(r.m.s),频差测量精度优于1 Hz(r.m.s),辐射源距离观测站下点900 km范围内,定位精度优于100 m(CEP)。相比传统外场实装测试,试验时间开销降低约80%,试验成本开销降低约70%,从而极大提升了系统测试效率和测试场景覆盖性,在地面内场实测环境下释放了多站编队协同定位体制的技术和工程风险。
For the challenges in the ground-based indoor field test and verification of the entire process of high-precision measurement and localization of time difference of arrival(TDOA)and frequency difference of arrival(FDOA)by multi-observation station formations in dynamic scenarios,a semi-physical testing method for multi-observation station localization system of TDOA and FDOA is proposed.The multi-stations localization system of TDOA and FDOA works collaboratively with dynamic scene simulators,agile signal generators,atomic clocks,system calibrations and other auxiliary equipments under a unifield time-frequency reference and control instructions,achieving a full-scale realistic simulation and test verification of the TDOA and FDOA variability environment and inter-statation time synchronization and frequency phase consistency constraints faced by the implemented multi-station system.The test result show that the TDOA measurement accuracy is better than 10 ns(r.m.s),the FDOA measurement accuracy is better than 1 Hz(r.m.s),and within a range of 900 km from the radiation source to the observation stations,the localization CEP accuracy is better than 100 meters.Compared with traditional field implemention tests,the test time cost is reduced by approximately 80%,and the test cost is reduced by approximately 70%,thereby greately improving the system testing efficiency and coverage,and releasing the techincal and engineering risks of the multi-station formation collaborative localization system in the ground indoor field measurement environment.
作者
陈云飞
杨光
陈林
郭鸿博
周彬
Chen Yunfei;Yang Guang;Chen Lin;Guo Hongbo;Zhou Bin(Southwest China Research Institute of Electronic Equipment,Chengdu 610036,China)
出处
《电子测量技术》
北大核心
2025年第20期26-35,共10页
Electronic Measurement Technology
基金
国家自然科学基金联合基金(U21A20455)项目资助。
关键词
动态场景
多站编队
时频差定位系统
半实物测试方法
motion scenarios
multi-station formations
localization systems of TDOA and FDOA
semi-physical testing method
