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Decision fusion method under non-ideal reporting channel based on optimal weighting coefficient

A technology of weighting coefficient and decision fusion, which is applied in the field of wireless communication, can solve the problems of low detection accuracy of spectrum sensing, and achieve the effect of improving detection accuracy of spectrum sensing, reducing influence, and accurate detection

Inactive Publication Date: 2018-09-04
XIDIAN UNIV
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Problems solved by technology

[0005] The purpose of the present invention is to address the deficiencies in the prior art, and propose a decision fusion method based on the optimal weighting coefficient under the non-ideal reporting channel, which is used to solve the detection of spectrum sensing under the non-ideal reporting channel in the prior art Technical issues with low accuracy

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  • Decision fusion method under non-ideal reporting channel based on optimal weighting coefficient
  • Decision fusion method under non-ideal reporting channel based on optimal weighting coefficient
  • Decision fusion method under non-ideal reporting channel based on optimal weighting coefficient

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Embodiment Construction

[0030] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0031] refer to figure 1 , a decision fusion method under non-ideal reporting channels based on optimal weighting coefficients, including the following steps:

[0032] Step 1: The authorized user sends a signal s(t) to K sensing users through the sensing channel, where K≥2;

[0033] Step 2: The kth perceived user acquires the detection amount Y k :

[0034] Step 2a: The kth sensing user uses a bandpass filter to filter the s(t) signal passing through the sensing channel, and samples the filtered signal N times in a detection time slot to obtain the time domain signal y k (n), wherein, n represents the sampling position;

[0035] Step 2b: The kth sensing user adopts the energy detection method, and passes y k(n) Calculate the detection amount Y of the kth perceived user k , whose calculation formula is:

[0036]

[0037] wher...

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Abstract

The invention provides a decision fusion method under a non-ideal reporting channel based on an optimal weighting coefficient, used for solving the technical problem of low spectrum sensing detectionaccuracy under a non-ideal reporting channel in prior art. The method is realized through the following steps of: filtering and sampling, by a perception user, the received signals sent by an authorized user to acquire a detecting quantity; acquiring judgment result, locally sensing false alarm probability and detection probability by the perception user, and sending the data to a fusion center; calculating the false alarm probability and detection probability under the non-ideal reporting channel; distributing weighting coefficients by the fusion center for the judgment result according to the received information to form a final detecting quantity; and comparing the detecting quantity with the corresponding sensing decision threshold so as to determine whether there is an authorized usersignal in the channel to be sensed. The invention effectively improves the detection accuracy under the non-ideal reporting channel and may be widely applied to various broadband wireless communication systems.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, and relates to a spectrum sensing decision-making fusion method, in particular to a spectrum sensing decision-making fusion method under non-ideal channels based on optimal weighting coefficients, which can be widely applied to various wireless communication systems. Background technique [0002] In today's rapid development, consumers' demand for wireless services is increasing day by day, and the shortage of spectrum resources has become the bottleneck of the rapid development of wireless communication technology, so cognitive radio technology appears. The core idea of ​​cognitive radio technology is: radio devices with cognitive functions dynamically use spectrum resources in the free frequency band of authorized users in the way of opportunistic access without affecting the normal communication of authorized users. Cognitive radio technology theoretically allows multi-dimension...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B17/382H04W16/14
CPCH04B17/382H04W16/14
Inventor 王勇孔令姣樊琴宫丰奎张南
Owner XIDIAN UNIV