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发明公开
CN104199003A 基于双线性变换的超宽带线性调频信号采样方法 失效 - 权利终止

基于双线性变换的超宽带线性调频信号采样方法
摘要：
本发明公开了一种基于双线性变换的超宽带线性调频信号采样方法，主要解决针对宽带信号现有技术的前端模数转换器采样率高的问题。其实现步骤是：(1)产生本振信号；(2)检波；(3)合成参考信号；(4)进行解线性调频变换；(5)低速采样；(6)插值；(7)合成共轭参考信号；(8)进行线性调频变换。本发明通过解线性调频变换和线性调频变换，将原始宽带信号重构的问题转化成利用参考信号和共轭参考信号恢复原始宽带信号的问题，实现了在低采样率条件下对模拟超宽带线性调频信号进行采样。
摘要（英）：

The invention discloses an ultra-wideband linear frequency-modulated signal sampling method based on bilinear transformation and mainly aims at solving the problem of high sampling rate of a front-end analogue-digital converter on wideband signals in the prior art. The ultra-wideband linear frequency-modulated signal sampling method based on bilinear transformation comprises the implementation steps of (1) generating a local oscillating signal, (2) detecting, (3) synthesizing a reference signal, (4) performing dechirping transformation, (5) performing low-speed sampling, (6) performing interpolation, (7) synthesizing a conjugate reference signal, and (8) performing linear frequency modulation transformation. The ultra-wideband linear frequency-modulated signal sampling method based on bilinear transformation has the advantages that the reconstruction problem of an original ultra-wideband signal is converted into the problem of recovering the original ultra-wideband signal by use of a reference signal and the conjugate reference signal by virtue of dechirping transformation and linear frequency modulation transformation, and the sampling of analogue ultra-wideband linear frequency-modulated signals under the condition of a low sampling rate is realized.

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