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Multi-user cooperative spectrum sensing strategy research method oriented to 5G

A multi-user collaboration and spectrum sensing technology, applied in the field of multi-user collaborative spectrum sensing strategy research, can solve problems such as reconstruction failure, affecting the spectrum sensing process, and difficult implementation of spectrum sensing problems, so as to reduce delay, suppress diffusion, Avoid overestimating the effect

Pending Publication Date: 2019-02-22
NANJING UNIV OF POSTS & TELECOMM
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Problems solved by technology

However, the problem with the traditional block sparse reconstruction algorithm is that the reconstruction will fail if the non-zero sub-block boundary information is unknown, that is, in the broadband spectrum sensing scenario, the authorized primary users (Primary Users, PU) occupy The sub-band boundary information of the secondary users (Secondary Users, SU) is often limited, and the SU usually only knows a general occupancy range of the PU, but the specific boundary information is unknown
In the complex channel environment of 5G applications with multiple frequency bands and multiple interference-intensive users, the uncertainty of noise will seriously affect the spectrum sensing process
At the same time, it is difficult to realize the spectrum sensing problem in the environment of low signal-to-noise ratio

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  • Multi-user cooperative spectrum sensing strategy research method oriented to 5G
  • Multi-user cooperative spectrum sensing strategy research method oriented to 5G
  • Multi-user cooperative spectrum sensing strategy research method oriented to 5G

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[0039] The implementation of the technical solution will be further described in detail below in conjunction with the accompanying drawings. The following examples are only used to illustrate the technical solution of the present invention more clearly, but not to limit the protection scope of the present invention.

[0040] Such as Figure 1~2 As shown, this embodiment provides: a 5G-oriented multi-user cooperative spectrum sensing strategy research method, including the following steps:

[0041] Step 1: User Signal x i (t) Modulated signal m i (t) After modulation, the analog broadband signal y is obtained through the channel impulse response h(t) i (t);

[0042] Step 2: Simulate wideband signal y i (t) passes at a rate f s =B is sampled to get M groups of sequences z i [k],i=1,2,...,M, then z j [k] is converted to frequency domain expression, and the obtained frequency domain signal expression model Z(f)=AY(f)+W(f), f∈[0,B],

[0043] where A∈C M×N Is the modulatio...

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Abstract

The invention discloses a multi-user cooperative spectrum sensing strategy research method oriented to 5G. The method in the invention does the research focusing on a decision fusion technology in cognitive radio cooperative sensing in a 5G environment and aims to solve the estimation problem of detection reliability of a fusion center to a detection node. According to the method in the invention,the detection reliability of each detection node is estimated through a probability statistic manner; meanwhile, the sparsity of a wideband frequency spectrum is used for researching a wideband frequency spectrum cognitive method based on a Block Orthogonal Matching Pursuit BOMP algorithm; the method uses modulation wideband converter (MWC) sampling to realize direction compression sampling of awideband simulation signal and uses the autocorrelation matrix symmetric decomposition characteristic and system user signal independence to obtain a finite-dimension compression sampling signal model. The method in the invention also introduces an AIC / MDL rule of an impact factor to estimate the sparsity as a condition for iteration stop of the BOMP algorithm, thereby greatly reducing the algorithm complexity and delay generated during sensing.

Description

technical field [0001] The invention relates to the technical fields of wireless communication, cognitive radio, and broadband spectrum sensing, and in particular to a 5G-oriented multi-user cooperative spectrum sensing strategy research method. Background technique [0002] The fifth generation of mobile communication (5G) is a new generation of mobile communication system developed for the needs of mobile communication after 2020. It will penetrate into the Internet of Things and various industries to realize the true "Internet of Everything". At the same time, the problem of shortage of wireless spectrum resources is becoming more and more prominent. Cognitive Radio (CR) technology senses the surrounding wireless environment while collecting the current state and referring to historical information for detection, analysis, learning and planning, and realizes dynamic spectrum access by adaptively adjusting its own transmission parameters. Improving spectrum utilization ha...

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Application Information

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IPC IPC(8): H04W16/14
CPCH04W16/14
Inventor 陆音付明娃王秀梅韩晓磊潘浩
Owner NANJING UNIV OF POSTS & TELECOMM
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