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基于模型外推的异源雷达相参配准
贠龄童,赵宏钟,杜梦园
0
(航天工程大学 研究生管理大队,北京 101416;航天工程大学 光电装备系,北京 101416)
摘要:
异源雷达带宽相参合成技术的关键和难点之一是相参配准,而对固定相位差异的估计精度较低,通常需采用各种优化算法提高估计精度,但计算量较大。在建立异源雷达回波模型后,分析了两种相位差异对衰减指数和(DE)模型的影响,用数据相关方法估计线性相位差异,并提出一种基于模型外推的固定相位差异补偿方法,将补偿固定相位差异与模型外推合为一步,简单有效,计算量小,不存在残余量,且该外推方法与传统外推方法相比误差基本没有增加。仿真结果表明,在14 dB信噪比下算法取得了令人满意的效果。
关键词:  异源雷达  带宽相参合成  相参配准  模型外推  固定相位差异
DOI:
基金项目:
Coherent compensation of multiple radar based on model extrapolation
YUN Lingtong,ZHAO Hongzhong,DU Mengyuan
(Department of Graduate Management,Aerospace Engineering University,Beijing 101416,China;Department of Optical and Electronic Equipment,Aerospace Engineering University,Beijing 101416,China)
Abstract:
One of the key and difficulties of the bandwidth coherent fusion technology of multiple radars is coherent compensation,but the estimation precision of constant phase difference is always low.Various optimization algorithms usually are used to improve the estimation precision,but the calculations burden is heavy.The influence of two phase difference on the Damped Exponential(DE)model is analyzed after models of multiple radars’ echo is built.Linear phase difference is estimated by data correlation method.And a constant phase difference compensation method based on model extrapolation is presented.The method puts constant phase difference compensation and model extrapolation into a step,so it is simple and effective.In addition,it has a small amount of calculation.And there is no residual.The extrapolation method presented in this paper increases little error compared with the traditional extrapolation method.The simulation results shows that the algorithm achieves satisfactory results under 14 dB signal-to-noise ratio(SNR).
Key words:  multiple radar  bandwidth coherent fusion  coherent compensation  model extrapolation  constant phase difference
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