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12th International Conference on Computer and Knowledge Engineering
Sum Rate Analysis and Power Allocation in Massive MIMO Systems with Power Constraints
Authors :
Abdolrasoul Sakhaei Gharagezlou
1
Mahdi Nangir
2
1- Faculty of Electrical and Computer Engineering University of Tabriz
2- Faculty of Electrical and Computer Engineering University of Tabriz
Keywords :
Spectral efficiency (SE)،Massive multiple-input multiple-output (MIMO) systems،Lagrange dual function،Power allocation
Abstract :
Since spectral efficiency (SE) is one of the important challenges in fifth generation (5G) telecommunication systems, researchers have extensively addressed this problem. In this paper, the authors have addressed the maximization problem of SE in a massive multiple-input multiple-output (MIMO) system. This optimization problem is resolved by allocating suboptimal power to users. Two constraints have been considered, according to which, the total power consumption of users should not exceed the maximum transmission power, and the power consumption of each user should not be less than a minimum power consumption. By using some changes of variables, the constraints of the optimization problem are simplified, and then, they are eliminated. An iterative algorithm is proposed to find the suboptimal power of users. The simulation results are compared with two algorithms based on game theory and equal power allocation schemes, which shows that the proposed method has a better performance than other two methods.
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