卫星网络和高空平台网络频谱共存下的分布式鲁棒波束成形算法

doi:10.11959/j.issn.1000-436x.2023211

Abstract

Abstract:

A distributed robust beamforming (BF) algorithm was proposed to improve spectrum efficiency for an integrated satellite and high altitude platform (HAP) network.Specifically, for the scenario where satellite network and HAP network adopted multicast and NOMA to serve their respective multiple users, an optimization problem was formulated to maximize the sum rate, subject to the rate requirements of both satellite and aerial terminals, and the transmit power budget of satellite and aerial platforms.Then, by considering both the imperfect channel state information (CSI) and the imperfect successive interference cancellation (SIC), S-procedure and sequential convex approximation were adopted to transform the nonconvex problem, and then a distributed BF algorithm using Lagrange duality was proposed to enable the spectral coexistence.Finally, simulation results demonstrate that the proposed algorithm can achieve a similar performance yet at a lower signaling overhead compared with the other existing works.

Key words: distributed beamforming, imperfect channel state information, non-orthogonal multiple access, imperfect successive interference cancellation

CLC Number:

TN92

Zining WANG, Min LIN, Fei LI, Lve HAN, Weiping ZHU. Distributed robust beamforming algorithm for spectral coexistence in satellite and high altitude platform networks[J]. Journal on Communications, 2023, 44(12): 39-49.

Figures/Tables 7

参数	数值
卫星高度/km	600
高空平台高度/km	20
卫星天线数	4×4
高空平台天线数	4×4
频段/GHz	20
带宽/MHz	50
卫星最大发射增益/dB	48
高空平台最大发射增益/dB	52
天线阵元间距	$d_{1} = d_{2} = \frac{λ}{2}$
非直达径个数	5

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Distributed robust beamforming algorithm for spectral coexistence in satellite and high altitude platform networks

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