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利用多相滤波技术提高LFMCW引信测距精度

Journal of Detection & Control(2010)

Cited 24|Views20
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Abstract
滤波器性能对调频定距引信测距精度有重要影响,直接设计高性能滤波器实现困难且实时性差。为此采用多相滤波技术,将滤波器系数重新排列映射成两维加权系数并运用网络结构的等效变换,使减采样率功能归结到滤波处理中,降低运算量的同时提高了谱分辨率和测距精度。通过定量分析和仿真验证,采用多相滤波技术,当多相因子D=8时,可将谱分辨率提高近10倍,测距精度提高约1个量级,计算量节省64倍。
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Key words
FM ranging fuze,variable sampling rate,ranging accuracy,polyphase filtering
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