Energy Efficiency Analysis of MISO-OFDM Communication Systems Considering Power and Capacity Constraints

Authors:
Xiaohu Ge;Jinzhong Hu;Cheng-Xiang Wang;Chan-Hyun Youn;Jing Zhang;Xi Yang
Affiliations:
Department of Electronics and Information Engineering, Huazhong University of Science and Technology, Wuhan, China;Department of Electronics and Information Engineering, Huazhong University of Science and Technology, Wuhan, China;Joint Research Institute for Signal and Image Processing, School of Engineering & Physical Sciences, Heriot-Watt University, Edinburgh, UK EH14 4AS;GRID Middleware Research Center of ICC, Korea Advanced Institute of Science and Technology, Taejon, South Korea 305;Department of Electronics and Information Engineering, Huazhong University of Science and Technology, Wuhan, China;Department of Electronics and Information Engineering, Huazhong University of Science and Technology, Wuhan, China
Venue:
Mobile Networks and Applications
Year:
2012

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Abstract

In this paper, the energy efficiency of multi-input single-output and orthogonal frequency division multiplexing (MISO-OFDM) communication systems with power and capacity constraints is investigated. By formulating the power allocation problem of MISO-OFDM communication systems, the minimum subchannel transmission power is analyzed with power and capacity constraints. Simulation results indicate that there exists a specific minimum subchannel capacity threshold. Moreover, the energy efficiency of MISO-OFDM communication systems starts to increase only when the minimum subchannel capacity exceeds the specific threshold.