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Journal of Applied Sciences >

2017 , Vol. 35 >Issue 6: 675 - 684

DOI: https://doi.org/10.3969/j.issn.0255-8297.2017.06.001

Communication Engineering

Multi-cell Multi-user Coordinated Resource Efficiency Optimization

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  • 1. School of Information Engineering, Southeast University, Nanjing 210096, China;
    2. Mechanical and Electronic Engineering College, Chizhou University, Chizhou 247000, Anhui Province, China;
    3. Key Laboratory of Cognitive Radio and Information Processing, Ministry of Education, Guilin University of Electronic Technology, Guilin 541004, Guangxi Province, China

Received date: 2016-10-13

  Revised date: 2017-02-26

  Online published: 2017-11-30

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Abstract

Spectrum efficiency (SE) and energy efficiency (EE) are key specifications for the performance of the fifth generation (5G) wireless communications. In this paper, we study optimization of resource efficiency of a coordinated multi-cell multi-user downlink system defined as a weighted sum of SE and EE. The considered optimization is a nonconvex problem due to nonconvexity of the user rate for an interference channel. The original problem is transformed to a tractable form by exploiting the fractional problem theory and the relation between the user rate and minimum mean square error. A hierarchical iterative alternating optimization algorithm is then proposed to address the latter. Furthermore, convergence of the algorithm is shown. Numerical results are provided to validate effectiveness of the proposed algorithm.

Key words： multi-cell coordinated communication; precoding; resource efficient optimization; non-convex problem; fractional programming

Cite this article

QIAN Ye-wang, HE Shi-wen, YANG Lü-xi . Multi-cell Multi-user Coordinated Resource Efficiency Optimization[J]. Journal of Applied Sciences, 2017 , 35(6) : 675 -684 . DOI: 10.3969/j.issn.0255-8297.2017.06.001

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