首页|Distortion-aware beamforming design for multi-beam satellite communications with nonlinear power amplifiers

Distortion-aware beamforming design for multi-beam satellite communications with nonlinear power amplifiers

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Hardware components can cause different impairments,including power amplifier(PA)non-linearities,which inevitably impact the system performance of satellite communications(SATCOM).In this work,we consider a multi-beam SATCOM downlink system and investigate the distortion-aware beamforming scheme with the characteristics of PA non-linearities.Notably,we aim to maximize the resource efficiency(RE),defined as the weighted sum of energy efficiency(EE)with spectral efficiency(SE),to obtain a flexible EE-SE tradeoff while accounting for the characteristics of PA distortion and the total power constraints.Given that the optimization objective is a sum of ratios and the high non-convexity involved in constraints,we propose an efficient approach that exploits the quadratic transformation,the Lagrange multiplier method,and the gradient ascent approach to handle this issue.Simulation results demonstrate the effectiveness of the distortion-aware beamforming approach in achieving the EE-SE tradeoff and exhibit a substantial RE performance gain over the conventional approach with ideal linear PAs assumed at the satellite transmitters.

multi-beam satellite communicationsnonlinear power amplifierenergy and spectral efficiency tradeoffresource efficiencyrobust beamforming

Xiang XIAO、Li YOU、Kezhi WANG、Xiqi GAO

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National Mobile Communications Research Laboratory,Southeast University,Nanjing 210096,China

Purple Mountain Laboratories,Nanjing 211100,China

Department of Computer Science,Brunel University London,London UB8 3PH,UK

National Natural Science Foundation of China for Outstanding Young ScholarsProspective and Key Technologies for Industry of the Key Technologies R&D Program of JiangsuProspective and Key Technologies for Industry of the Key Technologies R&D Program of JiangsuNatural Science Foundation of Jiangsu ProvinceNatural Science Foundation on Frontier Leading Technology Basic Research Project of JiangsuJiangsu Province Basic Research ProjectFundamental Research Funds for the Central UniversitiesFundamental Research Funds for the Central Universities

62322104BE2022067BE2022067-5BK20231415BK20222001BK201920022242022k600072242023K5003

2024

10.1007/s11432-023-3969-4

中国科学:信息科学(英文版)
中国科学院

中国科学:信息科学(英文版)

CSTPCDEI
影响因子：0.715
ISSN：1674-733X
年,卷(期)：2024.67(6)
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