Reliable and Energy-Efficient LEO Satellite Communication with IR-HARQ via Power Allocation

This paper examines reliable and energy-efficient transmission in low earth orbit (LEO) satellite communication systems. In particular, we analyze the link transmission characteristics of the LEO satellite to the ground user and model the channel as a combination of large-scale fading and small-scal...

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Bibliographic Details
Main Authors: Bian, H. (Author), Liu, R. (Author)
Format: Article
Language:English
Published: MDPI 2022
Subjects:
Online Access:View Fulltext in Publisher
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020 |a 14248220 (ISSN) 
245 1 0 |a Reliable and Energy-Efficient LEO Satellite Communication with IR-HARQ via Power Allocation 
260 0 |b MDPI  |c 2022 
856 |z View Fulltext in Publisher  |u https://doi.org/10.3390/s22083035 
520 3 |a This paper examines reliable and energy-efficient transmission in low earth orbit (LEO) satellite communication systems. In particular, we analyze the link transmission characteristics of the LEO satellite to the ground user and model the channel as a combination of large-scale fading and small-scale fading. Based on this, we consider an incremental redundancy hybrid automatic repeat request (IR-HARQ) technique with a variable-power allocation method, and we call it the IR-HARQ-VPA scheme. In this method, the outage probability after each IR-HARQ round can be obtained through numerical integration based on the fast Fourier transform (NI-FFT). This method is suitable for any number of HARQ transmission rounds and can improve the accuracy compared with previous approximation methods. In addition, variable-power allocation based on the genetic algorithm (VPA-GA) is introduced to reduce the energy consumption. The simulation results show that the proposed IR-HARQ-VPA scheme cannot only meet the requirements of transmission reliability but also achieves higher energy efficiency than IR-HARQ with equal power (IR-HARQ-EP) transmission and a previously proposed variable-power allocation method. Moreover, the simulation results in a LEO satellite communication window also confirm the effectiveness of the proposed IR-HARQ-VPA scheme. © 2022 by the authors. Licensee MDPI, Basel, Switzerland. 
650 0 4 |a energy efficiency 
650 0 4 |a Energy efficiency 
650 0 4 |a Energy utilization 
650 0 4 |a Error correction 
650 0 4 |a Fast Fourier transforms 
650 0 4 |a Genetic algorithms 
650 0 4 |a Hybrid automatic repeat request 
650 0 4 |a Hybrid automatic repeat-request protocol 
650 0 4 |a Hybrid-automatic repeat request 
650 0 4 |a Hybrid-automatic repeat request protocols 
650 0 4 |a Incremental redundancy 
650 0 4 |a Incremental redundancy hybrid automatic repeat request protocol 
650 0 4 |a IR-HARQ protocol 
650 0 4 |a LEO satellite communication 
650 0 4 |a Low earth orbit satellite communication 
650 0 4 |a Low earth orbit satellites 
650 0 4 |a Numerical methods 
650 0 4 |a Orbits 
650 0 4 |a power allocation 
650 0 4 |a Power allocations 
650 0 4 |a Satellite communication systems 
650 0 4 |a Satellite communications 
650 0 4 |a Satellites 
700 1 |a Bian, H.  |e author 
700 1 |a Liu, R.  |e author 
773 |t Sensors