| 到达时差和频差搜索算法的非线性约束最优化研究 |
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| 引用本文： | 刘伟华,黄振,陆建华. 到达时差和频差搜索算法的非线性约束最优化研究[J]. 装备指挥技术学院学报, 2010, 21(2): 74-78. DOI: 10.3783/j.issn.1673-0127.2010.02.017 |
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| 作者姓名： | 刘伟华 黄振 陆建华 |
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| 作者单位： | 1. 清华大学,电子工程系,北京,100084
2. 清华大学,航天航空学院,北京,100084 |
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| 基金项目： | 国家"973"重点基础研究基金项目 |
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| 摘 要： | 基于复模糊函数的到达时差和到达频差无源定位方法研究较多,但实际工程应用往往受到估计精度和计算量的矛盾制约。通过研究复模糊函数的特性,并结合硬件代价受限的实际应用需求,对抽取因子、搜索步长等相关参数进行非线性最优化,提出了到达时差和到达频差的搜索优化算法。经过仿真验证,所提出的算法在不降低精度的条件下大大降低了运算量,缩短了运算时间。
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| 关 键 词： | 复模糊函数 到达时差 到达频差 非线性约束最优 |
Research on Nonlinear Constrained Optimization of TDOA and FDOA Estimation |
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| LIU Weihua,HUANG Zhen,LU Jianhua. Research on Nonlinear Constrained Optimization of TDOA and FDOA Estimation[J]. Journal of the Academy of Equipment Command & Technology, 2010, 21(2): 74-78. DOI: 10.3783/j.issn.1673-0127.2010.02.017 |
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| Authors: | LIU Weihua HUANG Zhen LU Jianhua |
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| Affiliation: | LIU Weihua1,HUANG Zhen2,LU Jianhua1(1.Department of Electronic Engineering,Tsinghua University,Beijing 100084,China,2.School of Aerospace,China) |
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| Abstract: | Much theoretical research has been conducted on passive location of emitter with both time difference of arrival(TDOA) and frequency difference of arrival(FDOA),being estimated by complex ambi-guity functions(CAF).However,in practice,tradeoff between estimation accuracy and computation overhead likely becomes a bottleneck.Considering characteristics of CAF and practical limitations of hardware,a search method for TDOA/FDOA is proposed,of which the related parameters,such as decimation and search step size,a... |
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| Keywords: | complex ambiguity function time difference of arrival(TDOA) frequency difference of ar-rival(FDOA) nonlinear constrained optimization |
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