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

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-...

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Veröffentlicht in:	IEEE communications letters 2015-10, Vol.19 (10), p.1854-1857
Hauptverfasser:	Ge, Songhu, Xi, Yong, Zhao, Haitao, Huang, Shengchun, Wei, Jibo
Format:	Artikel
Sprache:	eng
Schlagworte:	Approximation Approximation methods Automatic repeat request Blocking Channels Cross-layer design energy efficiency Energy management Fading HARQ Mathematical analysis Measurement Optimization Payloads Signal to noise ratio Spectra spectral efficiency
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description	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.
doi_str_mv	10.1109/LCOMM.2015.2463278
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subjects	Approximation Approximation methods Automatic repeat request Blocking Channels Cross-layer design energy efficiency Energy management Fading HARQ Mathematical analysis Measurement Optimization Payloads Signal to noise ratio Spectra spectral efficiency
title	Energy Efficient Optimization for CC-HARQ Over Block Rayleigh Fading Channels
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