| 基于Kalman滤波的目标信号TOA测量校正 |
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| 引用本文： | 徐自励,刘昌忠,黄忠涛,何东林.基于Kalman滤波的目标信号TOA测量校正[J].通信技术,2010,43(6):194-197,203. |
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| 作者姓名： | 徐自励 刘昌忠 黄忠涛 何东林 |
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| 作者单位： | 中国民用航空局第二研究所,四川成都,610041 |
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| 基金项目： | 国家自然科学基金，国家自然科学基金重点项目，国家高技术研究发展计划(863计划) |
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| 摘 要： | 多点定位系统中,目标信号TOA测量精度直接决定了系统对目标的定位精度,而目标信号TOA测量精度取决于提供系统时钟的晶振的准确度和稳定度。针对多点定位系统中目标信号TOA测量准确度的具体问题,分析晶振频率偏移和GPS秒脉冲抖动对TOA测量准确度的影响,导出基于Kalman滤波的目标信号TOA测量校正方法。数值仿真证明此方法可以有效地改善目标信号TOA的测量准确度,对提高多点定位系统定位性能具有较强的现实意义与实用价值。
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| 关 键 词： | 多点定位 TOA测量 频率偏移 GPS秒脉冲 Kalman滤波 |
TOA Measurement Calibration Based on Kalman Filtering |
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| XU Zi-li,LIU Chang-zhong,HUANG Zhong-tao,HE Dong-lin.TOA Measurement Calibration Based on Kalman Filtering[J].Communications Technology,2010,43(6):194-197,203. |
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| Authors: | XU Zi-li LIU Chang-zhong HUANG Zhong-tao HE Dong-lin |
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| Affiliation: | XU Zi-li,LIU Chang-zhong,HUANG Zhong-tao,HE Dong-lin(The Second Research Institute,CAAC,Chengdu Sichuan 610041,China) |
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| Abstract: | For multilateration,the positioning accuracy is directly determined by signal TOA measurement of a target,while the TOA accuracy depends on the preciseness and stability of the crystal oscillator’ which provides the clock for the system.Aiming at the TOA measurement of multilateration,the impact of frequency offset and GPS PPS on TOA measurement accuracy is analyzed,and the algorithm of TOA measurement calibration based on Kalman filtering is derived.Numerical simulation shows that this algorithm could effectively raise the TOA measurement accuracy,and is of practical value in improving the performance of multilateration system. |
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| Keywords: | multilateration TOA measurement frequency offset GPS PPS Kalman filtering |
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