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Iterative generation method, terminal and storage medium of nonlinear frequency modulation signal

A non-linear frequency modulation, signal technology, applied in the field of signal processing

Active Publication Date: 2019-02-19
INST OF ELECTRONICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In order to solve the above technical problems, the embodiment of the present invention expects to provide an iterative generation method, terminal and storage medium of a nonlinear frequency modulation signal, which solves the problem in the related art that an accurate NLFM signal cannot be obtained according to the required PSLR, and realizes the requirement The PSLR designed the NLFM signal whose amplitude is the preset amplitude, and the designed NLFM signal basically coincides with the window function corresponding to the required peak-to-sidelobe ratio

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  • Iterative generation method, terminal and storage medium of nonlinear frequency modulation signal
  • Iterative generation method, terminal and storage medium of nonlinear frequency modulation signal
  • Iterative generation method, terminal and storage medium of nonlinear frequency modulation signal

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Embodiment Construction

[0053] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention.

[0054] It should be understood that references throughout the specification to "embodiments of the invention" or "the foregoing embodiments" mean that a particular feature, structure, or characteristic related to the embodiments is included in at least one embodiment of the present invention. Therefore, appearances of "in the embodiment of the present invention" or "in the foregoing embodiment" throughout the specification do not necessarily refer to the same embodiment. Furthermore, the particular features, structures or characteristics may be combined in any suitable manner in one or more embodiments. In various embodiments of the present invention, the size of the serial numbers of the above-mentioned processes does not mean the order of execution, and the execution order o...

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Abstract

The embodiment of the invention discloses an iterative generation method of a nonlinear frequency modulation signal. The method comprises the following steps of: determining a first power spectral density according to the demand peak lobe ratio; determining a first time domain signal according to the first power spectral density and a first spectral phase; wherein the first spectrum phase is a preset spectrum phase; performing signal amplitude normalization on the first time domain signal to obtain a second spectrum phase; and determining a second time domain signal according to the second spectral phase. The embodiment of the invention further discloses a terminal and a storage medium.

Description

technical field [0001] The present invention relates to but not limited to the field of signal processing, and in particular relates to an iterative generation method, terminal and storage medium of nonlinear frequency modulation signals. Background technique [0002] Synthetic Aperture Radar (SAR) is capable of all-day, all-weather, global earth observation and is widely used. At present, the linear frequency modulation (Linear Frequency Modulation, LFM) signal is the most commonly used transmission waveform in the SAR system. After this waveform is matched and filtered, the response function generated, after normalization, the Peak Side Lobe Ratio (Peak Side Lobe Ratio) Ratio, PSLR) is -13dB. In order to suppress the height of the side lobe, weighted window function, adaptive filtering and optimization algorithm are usually used, but these methods will make the matched filter mismatch and reduce the output signal-to-noise ratio (Signal to Noise Ratio, SNR). [0003] Comp...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S13/90G01S7/282
CPCG01S7/282G01S13/90
Inventor 金国栋王宇邓云凯张永伟王伟刘开雨
Owner INST OF ELECTRONICS CHINESE ACAD OF SCI