基于相控阵的跳波束波位优化及资源分配算法

doi:10.11959/j.issn.2096-8930.2022003

Abstract

Abstract:

Beam hopping technology can provide enough fl exibility and high resource utilization for satellite communication system, and shows good performance in broadband satellite communication system.However, the existing beam planning scheme of beam hopping technology is relatively fi xed and can not change with the change of service demand characteristics.For the situation of uneven distribution of user demand and scattered location, the advantages of beam hopping technology are diffi cult to play.To solve the above problems, a beam optimization method was proposed, which used the agility characteristics of phased array antenna to adjusted the size of beam according to the characteristics of service distribution, so as to made the service demand in each beam more balanced.On this basis, from the perspective of matching the demand with the actual transmission capacity, the minimization n-order diff erence objective function was established, the time slot resources allocated in each beam were solved by convex optimization algorithm, and the overall satisfaction and system delay of the system before and after beam optimization were compared.The simulation results showed that compared with the traditional beam planning scheme, the algorithm could improved the overall satisfaction of the system, reduced the system delay and improved the access success rate of the users.

Key words: beamhoppingtechnology, satellitecommunication, beamoptimization, phasedarrayantenna

CLC Number:

TP393

Mengting HAO, Chen ZHANG, Gengxin ZHANG. Beam Hopping Beam Optimization and Resource Allocation Algorithm Based on Phased Array[J]. Space-Integrated-Ground Information Networks, 2022, 3(1): 18-26.

Figures/Tables 13

参数	符号	数值
优化前总波束数目	K	21
原波束覆盖半径	r	100 km
原半功率角度	θ_3dB	0.32°
优化后各等级波束覆盖半径	r	[100, 200, 250]km
优化后各等级半功率角度	θ_3dB	[0.32° , 0.64° , 0.80°]
总带宽	B_t	240 MHz
总功率	P_t	100 W
时间窗口长度	W	128
单个业务时隙	t	90 ms
仿真时间	T_s	115 s
卫星轨道高度	H	35 786 km
自由空间损耗	L_free	212 dB
原天线传输增益	G_T	54 dB
优化后各等级的天线传输增益	${G^{'}}_{T}$	[54, 48, 46]dB
接收天线增益	G_R	40 dB

References 21

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