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Selective interference alignment-based equilibrium field gaming method for cognitive system

A technology of interference alignment and cognitive system, applied in the field of equilibrium field games based on selective interference alignment, which can solve the problem that the game is difficult to reach the Nash equilibrium point.

Active Publication Date: 2016-06-22
GUILIN UNIV OF ELECTRONIC TECH
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Problems solved by technology

However, with the development of cognitive radio technology, the number of secondary users is increasing, and it is difficult for ordinary games to reach the final Nash equilibrium point. Therefore, it is necessary to find a new game method to adapt to the growing number of secondary users. game between

Method used

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  • Selective interference alignment-based equilibrium field gaming method for cognitive system
  • Selective interference alignment-based equilibrium field gaming method for cognitive system
  • Selective interference alignment-based equilibrium field gaming method for cognitive system

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Embodiment Construction

[0033] The present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0034] Such as figure 1 , in the uplink cognitive cell system, there is one primary user and K secondary cells, each cell has a secondary base station and M secondary users, and the transmitting end and receiving end of the primary user are T 0 and R 0 , Cell1...CellK in the figure represent K cognitive cells respectively, and CBS1...CBSK represent base stations of the K cognitive cells respectively. Assuming that the distance between the transmitter of the primary user and the receiver of the secondary cell is large enough, we ignore the interference from the primary user to the secondary cell.

[0035] The number of transmission antennas for the secondary user SU is N t , the number of S...

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Abstract

The invention discloses a selective interference alignment-based equilibrium field gaming method for a cognitive system. The method comprises the following steps: a user or a group of users with maximal interference with a base station are selected from a non-expectation cell, and interference signals are aligned to a certain subspace via pre-coding treatment; when the number of the users is big enough, a random information channel is replaced with a stable estimation information channel, an estimation power matrix can be calculated according to an initiation power matrix, and therefore an optimum power matrix for Nash equilibrium can be obtained. The equilibrium field gaming method disclosed in the invention is effectively combined with selective interference alignment and is advantaged by interference suppression, maximization of total throughput capacity of a system and the like. Interference can be eliminated to the maximum extent, total throughput capacity of a sub-cell can be maximized, and the equilibrium field gaming method is particularly suitable for a cognitive multi-cell system having enough cells.

Description

technical field [0001] The invention belongs to the technical field of cognitive radio, in particular to an equilibrium field game method based on selective interference alignment in a cognitive system. Background technique [0002] With the development of science and technology, the existing unlicensed frequency bands can no longer meet people's normal needs, and the utilization rate of licensed frequency bands is extremely low. Cognitive radio technology is a key technology to effectively improve spectrum utilization by making unlicensed users (secondary users) opportunistically access licensed users (primary users) frequency bands. In this technology, the problem of interference has always been an important issue, mainly the interference between secondary users. Interference alignment technology can reduce the interference between secondary users. However, as the number of secondary users gradually increases, the maximum number of users that can be aligned is limited by...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B17/345H04B17/391H04B17/382H04L25/03
CPCH04B17/345H04B17/382H04B17/391H04L25/03974
Inventor 赵峰王文陈宏滨
Owner GUILIN UNIV OF ELECTRONIC TECH
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