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Pheromone-driven distributed collaborative broadband spectrum sensing method

A broadband spectrum and pheromone technology, applied in the field of pheromone-driven distributed collaborative broadband spectrum sensing, can solve the problems of inaccurate sensing results and affect the performance of collaborative sensing algorithms, so as to make up for the lack of sensing ability and improve detection accuracy. Effect

Active Publication Date: 2018-08-10
HANGZHOU DIANZI UNIV
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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 collaborative broadband spectrum sensing method
  • Pheromone-driven distributed collaborative broadband spectrum sensing method
  • Pheromone-driven distributed collaborative 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 wideband signal of each node into multiple channels of narrowband signals, wherein the wideband 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...

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Abstract

The invention discloses a pheromone-driven distributed collaborative broadband spectrum sensing method. The method comprises the following steps: dividing broadband signals of each node into a plurality of narrowband signal channels through a filter bank, wherein the broadband signals contain PU information, and the PU information is randomly segmented to the narrowband signal channels; using oneCU to sense each node, and carrying out energy detection on narrowband signals in each channel of a certain node to obtain judgment statistics and a judgment result of each channel of the current node; and using the CUs to sense pairwise interactive sensing information of subchannels with corresponding serial numbers of all the nodes, so that final fusion judgment results of the subchannels with the corresponding serial numbers of the different nodes are finally obtained. The method provided by the invention has the advantages that multi-node collaborative spectrum sensing is adopted, so thatthe defect that a sensing result obtained by a single node may not be correct due to effects from channel fading or other factors 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 Applications(China)
IPC IPC(8): H04B17/382
CPCH04B17/382
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