Power allocation method of cognitive radio energy efficiency optimization based on non-orthogonal multiple access

A non-orthogonal multiple access and cognitive radio technology, which is applied in the field of power allocation for cognitive radio energy efficiency optimization, can solve problems such as high complexity, low algorithm performance, and low algorithm complexity, and achieve the effect of excellent energy efficiency performance

Active Publication Date: 2018-12-18
CHONGQING UNIV OF POSTS & TELECOMM
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The full search algorithm has the best performance, but the complexity is extremely high; the fixed power algorith

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  • Power allocation method of cognitive radio energy efficiency optimization based on non-orthogonal multiple access
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  • Power allocation method of cognitive radio energy efficiency optimization based on non-orthogonal multiple access

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[0037] In order to make the technical problems to be solved, technical advantages and technical effects of the present invention clearer, the present invention will be further described below in conjunction with the accompanying drawings, but it is not intended as a limitation of the present invention. The present invention can also be applied through different implementation modes. For different viewpoints and applications in the invention, appropriate changes can be made in accordance with the basic spirit of the present invention.

[0038] The present invention is a non-orthogonal multiple access based cognitive radio energy efficiency optimization power allocation method, such as figure 2 ,include:

[0039] S1. Determine the consumption rate of the maximum transmission power of the subchannel according to the interference power constraint of each primary user, and determine the consumption rate of the minimum transmission power of the subchannel according to the quality o...

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Abstract

The invention belongs to the technical field of mobile communication, Particularly, the invention relates to a power allocation method of cognitive radio energy efficiency optimization based on non-orthogonal multiple access, which comprises the following steps: determining a consumption rate of a maximum transmission power of a subchannel according to an interference power constraint of each primary user; determining a consumption rate of a minimum transmission power of the subchannel according to a cognitive user quality of service constraint of each multiplexed user; To maximize the systemenergy efficiency as the optimization objective, in order to meet the maximum transmission power consumption rate and the minimum transmission power consumption rate of the sub-channel, obtaining theenergy efficiency optimization model, obtaining power allocation coefficients of cognitive users in subchannels based on convexity programming and normalization. The fractional programming problem istransformed into an equivalent convex problem by using Charnes-Cooper transform, and the optimal power consumption in subchannels is solved by using KKT condition and Lagrange multiplier method. On the premise of ensuring the service quality of the cognitive user and the fairness of the system, the average energy efficiency performance is superior to the fractional-order power distribution method.

Description

technical field [0001] The invention belongs to the technical field of mobile communication, and in particular relates to a power allocation method based on non-orthogonal multiple access (NOMA) cognitive radio energy efficiency optimization. Background technique [0002] With the widespread use of various mobile devices, current wireless networks are facing the problems of further increasing network capacity and shortage of available spectrum resources. However, so far, the static spectrum resource allocation leads to serious spectrum shortage. Therefore, in order to meet the massive growth of mobile services and user connections, cognitive radio technology is proposed. Cognitive radio technology further improves system performance by allowing cognitive users (unlicensed users) to access the spectrum of primary users (licensed users) in a certain way. In cognitive radio, there are two ways for cognitive users to access the spectrum of primary users. One is opportunistic. ...

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Application Information

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IPC IPC(8): H04B17/382H04B17/391H04W52/24H04W52/36
CPCH04B17/382H04B17/3912H04W52/243H04W52/367
Inventor 鲜永菊周梦园吴广富李云蔡丽娟
Owner CHONGQING UNIV OF POSTS & TELECOMM
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