| 低空目标高精度无源时差定位方法 |
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| 引用本文： | 牛新亮,赵国庆,刘原华,常虹.低空目标高精度无源时差定位方法[J].西安电子科技大学学报,2009,36(5):862-866. |
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| 作者姓名： | 牛新亮 赵国庆 刘原华 常虹 |
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| 作者单位： | (1. 西安电子科技大学 电子对抗研究所，陕西 西安710071；2. 西安电子科技大学 综合业务网理论及关键技术国家重点实验室，陕西 西安710071) |
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| 基金项目： | "十一五"国家部委预研基金资助 |
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| 摘 要： | 提出了一种改进的无源时差定位方法．该方法在主站增加对目标仰角的测量，形成了一个包含3个子系统的冗余定位系统．首先从各子系统获得3组含有模糊的定位结果，然后通过最近邻匹配消除定位模糊，最后对各子系统消除定位模糊后的结果进行简化加权最小二乘(SWLS)融合，获得了比传统无源时差定位方法更好的性能．仿真结果表明，目标高度较高时，改进方法与传统方法的定位精度相当;而对于低空目标，改进方法的定位精度远高于传统方法．
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| 关 键 词： | 无源定位 到达时间差 仰角 低空目标 |
| 收稿时间： | 2008-11-13 |
High precision passive TDOA location method for low-altitude targets |
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| NIU Xin-liang,ZHAO Guo-qing,LIU Yuan-hua,CHANG Hong.High precision passive TDOA location method for low-altitude targets[J].Journal of Xidian University,2009,36(5):862-866. |
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| Authors: | NIU Xin-liang ZHAO Guo-qing LIU Yuan-hua CHANG Hong |
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| Affiliation: | (1. Research Inst. of Electronic Countermeasures, Xidian Univ., Xi'an 710071， China;
2. State Key Lab. of Integrated Service Networks, Xidian Univ., Xi'an 710071， China) |
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| Abstract: | An improved passive TDOA location method is proposed. The novel method uses the elevation angle of the target as a new measurement to form a redundant location system consisting of three subsystems. Each subsystem can obtain a set of location results with ambiguity. A better performance can be achieved after eliminating the ambiguity by the nearest matching and processing the location results by SWLS fusion. Simulation results show that the proposed method has almost the same precision as the usual method for the high-altitude targets; however, it has a much higher precision for the low-altitude targets. |
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| Keywords: | passive location TDOA elevation angle low-altitude targets |
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