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Pheromone-Driven Distributed Cooperative Broadband Spectrum Sensing Method

A broadband spectrum and pheromone technology, applied in the field of pheromone-driven distributed collaborative broadband spectrum sensing, can solve problems such as inaccurate sensing results and affecting the performance of collaborative sensing algorithms, and achieve the goal of making up for the lack of sensing capabilities and improving detection accuracy Effect

Active Publication Date: 2020-02-28
HANGZHOU DIANZI UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

According to the low signal-to-noise ratio (SNR), the inaccurate perception results of the CU affect the performance of the collaborative sensing algorithm

Method used

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  • Pheromone-Driven Distributed Cooperative Broadband Spectrum Sensing Method
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  • Pheromone-Driven Distributed Cooperative Broadband Spectrum Sensing Method

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Embodiment Construction

[0022] The implementation steps of the present invention will be further described in detail below.

[0023] Such as figure 1 , 2 As shown, a pheromone-driven distributed collaborative spectrum sensing method specifically includes the following steps:

[0024] Step (1), using a filter bank to divide the broadband signal of each node into multiple narrowband signal channels, wherein the broadband signal contains PU information, and the PU information is randomly divided into narrowband signal channels. Suppose the input signal is x(n), the prototype filter response is h(n), and the total number of sub-channels is D. Pass x(n) through the filter bank to obtain the output of the D sub-channel as y p (m).

[0025] the y p The specific generation method of (m) is as follows:

[0026]

[0027] where x p (m)=x(mD-p) is the input signal of the pth sub-channel, h p (m)=h(mD+p) is the filter response of the pth sub-channel, y p (m) represents all output signals of the p-th s...

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Abstract

The invention discloses a pheromone driven distributed collaborative broadband spectrum sensing method. According to the method, a filter group divides a broadband signal of each node into multiple narrowband signal channels, wherein the broadband signal contains PU information, and the PU information is segmented to the narrowband signal channel randomly; one CU senses one node, and energy detection is performed on the narrowband signal of each channel of a certain node, so as to obtain a determining statistic and a determining result of each channel of the node; and the CU senses interactivesensing information every two channels of a sequential number corresponding to a different node, and adjusts the pheromone according to a fusion rule till a final fusion determining result is obtained. Due to use of multi-node collaborative spectrum sensing, the defect that impact of channel attenuation and other factors on the single node causes low accuracy of the obtained sensing result is overcome.

Description

technical field [0001] The invention belongs to the field of cognitive radio spectrum sensing, and in particular relates to a pheromone-driven distributed cooperative broadband spectrum sensing method. Background technique [0002] Spectrum sensing technology is a key technology of cognitive radio (Cognitive Radio, CR). Spectrum resources become more and more scarce with development, and the "exclusive" fixed allocation policy is the main reason for the shortage of spectrum resources. As a technology that can significantly improve spectrum reuse rate and reduce spectrum waste, CR has been greatly developed. According to the number of sensing nodes, CR can be divided into single-node sensing and multi-node sensing. [0003] The single-node spectrum sensing method is affected by various factors such as channel fading, and the spectrum sensing results are not necessarily accurate. Therefore, multi-node cooperative sensing is required to further improve the accuracy of spectru...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W16/14
CPCH04W16/14
Inventor 毛翊君赵知劲郑仕链张煜培尚俊娜强芳芳尹辉杨安锋张笑菲韩仕鹏陈思佳
Owner HANGZHOU DIANZI UNIV