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Broadband collaboration spectrum sensing method

A collaborative spectrum sensing and broadband technology, applied in the field of communications, can solve problems such as poor real-time performance and low detection accuracy

Active Publication Date: 2015-12-02
GUILIN UNIV OF ELECTRONIC TECH
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Problems solved by technology

[0005] The present invention provides a wideband collaborative spectrum sensing method for the existing wideband compressed spectrum sensing algorithm with low detection accuracy and poor real-time performance

Method used

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Embodiment Construction

[0052] The technical scheme of the present invention is described in detail below in conjunction with accompanying drawing:

[0053] A broadband cooperative spectrum sensing method based on the multi-measurement vector block sparse Bayesian learning-marginal likelihood function maximization (MBSBL-FMLM) algorithm, such as figure 1 shown, including the following steps:

[0054] Step 1. Use an analog information converter to input broadband signals Perform compressed sampling to obtain the observation vector Where L is the number of users, and the observation matrix Y can be formed from the observation vector; and according to the sampling matrix Φ of the analog information converter and the Fourier transform base matrix Ψ N Determine the compressed sensing matrix Θ, the form of its sub-matrix combination is Θ=[Θ 1 ,Θ 2 ,...,Θ K ], where K is the number of sub-channels.

[0055] Step 2, calculate the inner product of each sub-matrix in Θ and the observation matrix Y, sel...

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Abstract

The invention discloses a broadband collaboration spectrum sensing method, which utilizes the block sparse structure of the broadband signal, and utilizes fast marginal likelihood function maximization to perform fast parameter estimation, so as to improve the detection probability, reduce the normalized mean squared error and decrease the detection time consumption of the conventional algorithm. Moreover, a frequency diversity effect is achieved among the nodes of the multi-node wideband cooperative spectrum sensing algorithm, so as to overcome the disadvantages of low detection accuracy and poor real-time performance caused by single node detection.

Description

technical field [0001] The present invention relates to the field of communication technology, in particular to a broadband cooperative spectrum sensing method. Background technique [0002] Today, with the rapid development of wireless communication technology, information technology has penetrated into every corner of people's lives. After the advent of the information age, people's demand for communication services continues to grow, making the spectrum resources that support the normal implementation of communication technologies increasingly scarce. At the same time, since the current spectrum resource allocation scheme is mainly based on static allocation, the problem of unbalanced use of spectrum resources has become increasingly prominent. The specific manifestations are: many licensed frequency bands are often idle, while unlicensed frequency bands are often overused and cause congestion. The emergence of cognitive radio technology makes dynamic spectrum allocatio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B17/382
Inventor 肖海林刘彩丽张文娟胡悦王成旭侯嘉
Owner GUILIN UNIV OF ELECTRONIC TECH
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