基于时间反演的上行NOMA系统能效优化算法

doi:10.12305/j.issn.1001-506X.2022.03.33

Abstract

Abstract:

In order to solve the problem of low transmission efficiency in non-orthogonal multiple access (NOMA) system, a time reversal (TR) based uplink NOMA network resource allocation algorithm is proposed. Firstly, the signal receiving intensity of user is improved by the spatial-temporal focusing of the TR technology. Next, considering the user's minimum transmission rate constraint and the user's maximum transmission power constraint, a resource allocation model for maximizing system energy efficiency is established. Then, by using fractional programming theory and continuous convex approximation method, the proposed non-convex optimization problem is transformed into a convex optimization problem, and the global optimal solution is obtained by using Lagrangian duality theory. Simulation results show that compared with traditional algorithms, the proposed algorithm has better energy efficiency.

Key words: time reversal, non-orthogonal multiple access(NOMA), resource allocation, energy efficiency maximization

CLC Number:

TN929.5

Shanxue CHEN, Shengjin WU, Bowen GU. Energy efficiency optimization algorithm for uplink NOMA systems with time reversal[J]. Systems Engineering and Electronics, 2022, 44(3): 1007-1013.

Figures/Tables 6

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Table 1

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References 31

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参数	参数值
电路损耗功率P_f/W	0.2
最小传输速率R_m^min/(bit·(s·Hz)^-1)	1
用户数N_t	2
背景噪声功率σ²/W	10^-8
最大迭代次数T_max	10⁴
收敛精度ξ	10^-6

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Energy efficiency optimization algorithm for uplink NOMA systems with time reversal

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