Energy efficient power allocation method based on non-orthogonal multiple access in mimo system

Abstract

The present invention relates to the field of communication technology, in particular to an energy-efficient power allocation method based on non-orthogonal multiple access in a MIMO system, including: taking users as buyers and base stations as sellers; constructing a utility optimization model for the buyer and a utility optimization model for the seller ; Introduce the auxiliary variable to solve the buyer's optimal power purchase strategy; use the convex optimization method to solve the seller's optimal price formulation strategy; the base station and the user will get the user power value when the game reaches equilibrium; update the auxiliary variable to calculate the user's optimal energy efficiency value , so as to obtain the energy efficiency value of the system. The present invention only considers the self-interest of a single user, each user maximizes its own energy efficiency, and reduces the complexity of the algorithm; in the game process between the user and the base station, the power purchase value and price are adjusted according to the size of the serial interference elimination residual factor, and the result is more close to the optimal value.

Description

technical field [0001] The invention relates to the technical field of communication, in particular to an energy-efficient power allocation method based on non-orthogonal multiple access in a MIMO system. Background technique [0002] Mobile communication has achieved rapid development in recent decades, but people's demand for speed is still growing, and the spectrum resources available for wireless communication are not unlimited, so in 5G communication, there must be multiple users sharing The phenomenon of communicating on the same frequency band. In the multiple-input-to-output (Multiple-Input Multiple-Output, MIMO) technology adopted in 4G, the principle that any user in the same beam exclusively occupies a certain sub-channel is adopted. The Internet of Everything will inevitably lead to an explosion of data traffic, so the research on MIMO in 5G will be more in-depth. Non-Orthogonal Multiple Access (NOMA) technology can superimpose multiple users at the sending end...

AI Technical Summary

Problems solved by technology

At present, most of the research has been on MIMO-NOMA system, but the research on the MIMO-NOMA system model based on imperfect SIC is still in its infancy, so the research in this area is very important for the actual communication system

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