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Multi-time-bandwidthlinear frequency modulationpulse compressionsignal amplitudeenvelope curve generating method

A technology of envelope curve and frequency modulation pulse, which is applied in the field of signal amplitude envelope curve generation, can solve problems such as complicated steps, and achieve the effect of satisfying precision

Active Publication Date: 2018-02-13
BEIJING INST OF REMOTE SENSING EQUIP
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Problems solved by technology

[0003] The purpose of the present invention is to provide a method for generating a multi-time-width chirp compressed signal amplitude envelope curve, which solves the problem of complex steps when the commonly used signal amplitude envelope curve generation method generates a multi-time-width chirp compressed signal amplitude envelope curve

Method used

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Embodiment Construction

[0016] A method for generating an amplitude envelope curve of a multi-time-width chirp compressed signal, the specific steps of which are as follows:

[0017] The first step is to build an amplitude envelope curve generation platform

[0018] The amplitude envelope curve generation platform includes: a signal sampling module, an orthogonal transformation module, a time width determination module and an amplitude envelope curve generation module. The function of the signal sampling module is: sampling the multi-time-width chirp signal to form a sampling sequence; the function of the intermediate frequency quadrature coherent detection module is: performing parity extraction, low-pass filtering and 1 / 2 extraction processing on the sampling sequence; The function of the amplitude envelope curve generation module is: to generate the amplitude envelope curve of the multi-time-width chirp compression signal.

[0019] In the second step, the signal sampling module samples the multi-...

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Abstract

The invention discloses a multi-time-bandwidthlinear frequency modulationpulse compressionsignal amplitudeenvelope curve generating method which is achieved through a signal sampling module, an orthogonal transformation module, a time-bandwidth determining module and an amplitudeenvelope curve generating module. The signal sampling module samples multi-time-bandwidthlinear frequency modulationpulsesignals to form a sampling sequence. A medium-frequency orthogonal coherent detection module conducts odd-even extraction, lowpass filtering and 1 / 2 extracting treatment on the sampling sequence. Theamplitudeenvelope curve generating module determines effective time bandwidth and generates amplitudeenvelope curves of the multi-time-bandwidthlinear frequency modulationpulse compression signals. The problem is solved that a common signal amplitudeenvelope curve generating method includes complicated steps when amplitudeenvelope curves of multi-time-bandwidthlinear frequency modulationpulse compression signals are generated.

Description

technical field [0001] The invention relates to a method for generating a signal amplitude envelope curve, in particular to a method for generating a multi-time-width linear frequency modulation pulse compression signal amplitude envelope curve. Background technique [0002] In the process of radar signal processing, it is necessary to generate the amplitude envelope curve of multi-time width chirp compression signal under the condition that the frequency modulation bandwidth of the multi-time width chirp signal is known and the time width is unknown. The linear frequency modulation (LFM) pulse signal refers to the frequency of the signal sweeping up or down linearly within the pulse width; the linear frequency modulation (LFM) pulse compression signal refers to the signal formed by the linear frequency modulation pulse signal after pulse compression processing. The commonly used method for generating the amplitude envelope curve of chirp compressed signal needs to sample th...

Claims

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Application Information

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IPC IPC(8): G01S7/41
CPCG01S7/41
Inventor 段云鹏
Owner BEIJING INST OF REMOTE SENSING EQUIP
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