Differential game-based cognitive radio (CR) system power control method

A cognitive radio and power control technology, applied in cellular mobile communication and cognitive radio fields, can solve the problems of low spectrum utilization and low ISM frequency spectrum efficiency.

Inactive Publication Date: 2011-05-25
青海西部矿业科技有限公司
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AI Technical Summary

Problems solved by technology

Spectrum management is very simple in this statically controlled allocation method, but a large number of measurement data show that its spectrum utilization rate is quite low. Taking the United States as an example, below 3GHz, the utilization rate of the allocated spectrum varies with time and geographical location from 15% to 85%, resulting in time and space spectrum hole (sp

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  • Differential game-based cognitive radio (CR) system power control method
  • Differential game-based cognitive radio (CR) system power control method
  • Differential game-based cognitive radio (CR) system power control method

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Embodiment Construction

[0023] The detailed steps of the invention and related technical implementation methods are described below in conjunction with the accompanying drawings.

[0024] figure 1 A single-cell mobile communication system is given. Assuming that the primary user (primary user) adopts FDMA or TDMA multiple access mode, it is impossible for the primary user to continuously use the licensed spectrum resources, so it is easy to generate spectrum holes that can be reused by cognitive users. Assuming that the district is located in the Cognitive users form a base station-centered CR system, and the set of cognitive users is . at time Inside, cognitive users use CDMA multiple access to share a section of spectrum holes, and are stationary or moving at a low speed. at the moment , cognitive users ( ) signal-to-interference ratio (SIR) is

[0025] (1)

[0026] in for Know the user all the time transmit power, , cognitive users The ma...

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Abstract

The invention relates to the field of cognitive radio (CR) and cellular mobile communication, in particular to a differential game-based CR system power control method. The control method comprises the following steps of: 1) constructing a CR system model; 2) designing a power extraction cost function and a power radiation hazard cost function; 3) constructing a power control differential game model; and 4) resolving feedback Nash equilibrium. In the method, the dynamic property of time continuity of an actual CR system is described well, a non-cooperative differential game model for controlling CR system power is established, a differential game-based distributed non-cooperative power control method is provided, and a feedback Nash equilibrium analytic solution is acquired. Through power control in a distributed non-cooperative power cognitive differential game (DNPCDG) algorithm, interference among cognitive users is effectively suppressed, so that total throughput is increased, and system performance is improved.

Description

technical field [0001] The invention relates to the field of cognitive radio and cellular mobile communication, in particular to a differential game-based cognitive radio system power control method. Background technique [0002] With the rapid development of wireless communication technology, the demand for wireless spectrum resources in communication systems is also increasing, and the scarce spectrum resources can no longer meet the growing demand. It can be seen from some research results in recent years that the lack of spectrum resources is more caused by the existing spectrum management and allocation strategies. Most of the existing spectrum management and allocation strategies are based on static control models, that is, the management organization divides the available spectrum resources into fixed, non-overlapping spectrum blocks, and these spectrum blocks are fixed in size and divided by guard bands. Assigned to different services and technologies in an exclusiv...

Claims

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Application Information

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IPC IPC(8): H04B17/00H04W16/14H04W52/24H04B17/382
Inventor 林大泽张永德周贤伟黄秋香张鸣鲁李永芳张龙刘涛吴华怡邓宇
Owner 青海西部矿业科技有限公司
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