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Broadband spectrum detecting method and device

A wide-band spectrum and detection method technology, applied in the field of signal processing, can solve the problems of high computational complexity and low spectrum occupancy, and achieve the effect of reducing the number of binary detections and reducing the overall computational complexity

Active Publication Date: 2014-12-17
36TH RES INST OF CETC
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Problems solved by technology

[0008] The present invention provides a broadband spectrum detection method and device to solve the problem of high computational complexity caused by binary detection of all subbands when the spectrum occupancy rate is not high

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  • Broadband spectrum detecting method and device

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Embodiment Construction

[0035] In order to make the object, technical solution and advantages of the present invention clearer, the implementation manner of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0036] figure 1 A schematic flow chart of a wideband spectrum detection method provided by an embodiment of the present invention, the wideband spectrum detection method includes:

[0037] S100, binary detection of the presence or absence of signals in the entire frequency band.

[0038] Wherein, the binary detection method may be maximum-minimum eigenvalue ratio detection or detection based on frequency domain entropy.

[0039] S101. If the detection result is that no signal is included, determine that the frequency spectrum of the entire frequency band is idle.

[0040] S102, if the detection result is that the signal is contained, perform two or more levels of channel division on the entire frequency band, and the next level of ch...

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Abstract

The invention discloses a broadband spectrum detecting method and device. The broadband spectrum detecting method comprises the steps of: performing binary detection on signal existence of a whole frequency band; if the detecting result is that no signal is included, judging that the spectrum of the whole frequency band is idle; otherwise, performing two or more levels of signal channel division on the whole frequency band, performing the next level of signal channel division only by aiming at a sub-band including signals in the former level of signal channel division, and finally outputting a result that the bandwidth of the sub-band is consistent with a set spectrum detection resolution after the last level of signal channel division; performing binary detection on the sub-band which is output after each level of signal channel division; judging that a spectrum portion corresponding to the sub-band including the signals is occupied and the other spectrum portions are idle based on a binary detection result of the sub-band output after the last level of the signal channel division. Compared with the prior art in which binary detection is performed on all the sub-bands, the technical scheme of the invention can greatly reduce the binary detection time number, and further can reduce the total calculation complexity of broadband spectrum detection.

Description

technical field [0001] The invention relates to the technical field of signal processing, in particular to a broadband spectrum detection method and device. Background technique [0002] Cognitive radio is an intelligent wireless communication technology that dynamically utilizes spectrum holes, and wideband spectrum detection is a prerequisite for its work. Assuming that the frequency band to be detected is divided into N channels, the task of wideband spectrum detection is to determine which channels are occupied by signals and which channels are idle. [0003] Binary detection is used to solve the following binary decision problems: [0004] h 0 :x[n]=w[n] [0005] h 1 :x[n]=s[n]+w[n] [0006] Among them, x(n) is the signal to be detected, w(n) is the noise, s(n) is the signal, H 0 and H 1 are the hypotheses for the absence of the signal and the presence of the signal, respectively. [0007] Through the binary detection method, it can be judged whether the above N...

Claims

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Application Information

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IPC IPC(8): H04B17/00H04W24/00
Inventor 郑仕链杨小牛
Owner 36TH RES INST OF CETC
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