Low-Complexity Link Adaptation for Energy Efficiency Maximization in MIMO-OFDM Systems

被引：15
|
作者：
Eraslan, Eren [1 ,2 ]
Daneshrad, Babak [1 ]
机构：
[1] Univ Calif Los Angeles, Dept Elect Engn, Los Angeles, CA 90095 USA
[2] Broadcom Ltd, Broadband Carrier Access Grp, Irvine, CA 92617 USA
来源：
IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS | 2017年 / 16卷 / 08期
关键词：
MIMO; OFDM; link adaptation; energy; efficiency; low-complexity; PER; RESOURCE-ALLOCATION; ANTENNA;
D O I：
10.1109/TWC.2017.2705706
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
We present a low-complexity link adaptation algorithm for maximizing the energy efficiency (EE) of MIMO-OFDM systems. We prove that the EE is a single-peaked quasi-concave function of the transmit power and develop an iterative algorithm to find near-optimal transmit power. We further prune the search space by analyzing the singular values of the channel. The resulting link adaptation protocol achieves orders of magnitude reduction in complexity compared with the brute force search method without noticeably sacrificing the performance.
引用
收藏
页码：5102 / 5114
页数：13
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