Energy Efficient Optimization for CC-HARQ Over Block Rayleigh Fading Channels

被引：16

作者：

Ge, Songhu ^{[1
]}

Xi, Yong ^{[1
]}

Zhao, Haitao ^{[1
]}

Huang, Shengchun ^{[1
]}

Wei, Jibo ^{[1
]}

机构：

[1] Natl Univ Def Technol, Sch Elect Sci & Engn, Changsha 410073, Hunan, Peoples R China

来源：

IEEE COMMUNICATIONS LETTERS | 2015年 / 19卷 / 10期

基金：

中国国家自然科学基金; 国家高技术研究发展计划(863计划);

关键词：

Cross-layer design; HARQ; energy efficiency; spectral efficiency; ARQ; THROUGHPUT; TRADEOFF;

D O I：

10.1109/LCOMM.2015.2463278

中图分类号：

TN [电子技术、通信技术];

学科分类号：

0809 ;

摘要：

In this letter, the energy efficiency (EE) of Chase combining based hybrid automatic repeat request (CC-HARQ) over block Rayleigh fading channels is analyzed and optimized from a cross-layer perspective. Specifically, we derive the EE of CC-HARQ in a tractable closed-form expression using a new log-domain linear threshold approximation method. Then the optimum payload length and average transmission energy per bit are identified to maximize the EE. In addition, to achieve a flexible tradeoff between EE and spectral efficiency (SE), the unified EE-SE tradeoff metric is introduced and optimized. The analytical and simulation results verify the effectiveness of our design.

引用

页码：1854 / 1857

页数：4

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