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Signal detection method and device based on guide filtering

A technology of guided filtering and signal detection, applied in the field of signal processing, can solve the problems of disappearance of time-frequency distribution and inability to preserve the time-frequency distribution of signals A and B at the same time.

Active Publication Date: 2022-05-10
AEROSPACE INFORMATION RES INST CAS
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Problems solved by technology

For the case where signal A is superimposed on signal B in both the time domain and the frequency domain, the time-frequency map cannot preserve the time-frequency distribution of signal A and B at the same time after binarization, so that the time-frequency distribution of signal A disappears, so only detection out signal B

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  • Signal detection method and device based on guide filtering
  • Signal detection method and device based on guide filtering
  • Signal detection method and device based on guide filtering

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Embodiment Construction

[0039] Hereinafter, embodiments of the present invention will be described with reference to the drawings. It should be understood, however, that these descriptions are exemplary only and are not intended to limit the scope of the present invention. Also, in the following description, descriptions of well-known structures and techniques are omitted to avoid unnecessarily obscuring the concept of the present invention.

[0040] The terminology used herein is for the purpose of describing particular embodiments only, and is not intended to be limiting of the invention. The words "a", "an" and "the" used herein shall also include the meanings of "plurality" and "multiple", unless the context clearly indicates otherwise. The terms "comprising", "comprising", etc. used herein indicate the presence of stated features, steps, operations and / or components, but do not exclude the presence or addition of one or more other features, steps, operations or components.

[0041] All terms (...

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Abstract

The invention provides a signal detection method based on guided filtering, which comprises the following steps that: short-time Fourier transform is carried out on a broadband receiving signal to be detected to obtain a time-frequency diagram of the broadband receiving signal, the broadband receiving signal comprises noise and unknown signals, and the number of the unknown signals is an integer greater than or equal to 0; performing guided filtering on the time-frequency graph to enhance edge features of all unknown signals in the time-frequency graph; performing edge detection on the time-frequency graph after edge feature enhancement to generate an edge detection result graph for displaying the edge of the unknown signal; and detecting an unknown signal in the broadband receiving signal according to the edge detection result graph. According to the detection method, edge features of different unknown signals in a time-frequency diagram are effectively reserved and enhanced by adopting guide filtering, and effective detection of a plurality of unknown signals is realized through edge detection and calculation. The invention further provides a signal detection device based on guide filtering.

Description

technical field [0001] The present invention relates to the technical field of signal processing, in particular to a signal detection method and device based on guided filtering. Background technique [0002] In a radio receiver, signal detection is the basis for subsequent target signal parameter estimation, filtering extraction, modulation identification, demodulation and decoding. With the development of radio software and hardware technology, the bandwidth of received signals has been greatly increased. In the obtained broadband received signals, there are multiple target signals with unknown parameters such as quantity, start and end time, and center frequency. How to realize the automatic detection of multiple signals in the broadband range Detection is the problem to be solved. [0003] For a broadband received signal within a certain period of time, due to the presence of multiple unknown signals, the time domain or frequency domain of the unknown signals may overla...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B1/10H04B17/00G06K9/00
CPCH04B1/1027H04B1/10H04B17/00G06F2218/08G06F2218/12
Inventor 张妤姝胡玉新关欣丁昊张尚煜
Owner AEROSPACE INFORMATION RES INST CAS
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