高低轨卫星联合覆盖干扰规避多波束资源分配

doi:10.19665/j.issn1001-2400.20250509

Abstract

Abstract:

In the joint coverage satellite communication systems with the Geosynchronous Orbit (GSO) and Low Earth Orbit (LEO),the deployment of LEO communication systems must unconditionally avoid interference with GSO communication systems.Existing research on spatial isolation multi-beam resource allocation algorithms based on the isolation angle,which may not meet the interference avoidance requirements of the International Telecommunication Union (ITU),or may reduce the service quality of LEO communication systems.In response to the above issues,this paper proposes an interference avoidance multi-beam resource allocation mechanism considering the joint coverage provided by GSO and LEO.Taking the Equivalent Power Flux Density (EPFD) as the interference avoidance constraint and aiming to maximize Beam Service Satisfaction (BSS),a multi-beam resource allocation optimization problem is formulated considering the joint coverage provided by GSO and LEO.Then a solution combining particle swarm optimization and genetic algorithm (BSS Beam Hopping Interference Avoidance with PSO and GA,BBHIA-PG) is proposed.Simulations are carried out to verify the performance of the BBHIA-PG,by comparing it with existing Joint Iterative Multi Satellite Beam Hopping (JIMS-BH) and Load Balancing and Energy Efficient Beam Hopping (LB-EE-BH) algorithms.Based on the selected traffic model,when the system is busiest,BBHIA-PG and LB-EE-BH can meet the EPFD threshold requirements while JIMS-BH cannot.Moreover,BBHIA-PG provides a BSS that is 7.43% higher than that of LB-EE-BH and 3.31% lower than that of JIMS-BH,and a beam throughput performance that is 11.91% higher than that of LB-EE-BH and 2.99% higher than that of JIMS-BH.When the system is idlest,three algorithms show a similar performance in BSS and beam throughput,but JIMS-BH cannot meet the EPFD threshold requirements.

Key words: satellite communication systems, joint coverage with GSO and LEO, resource allocation, interference avoidance

CLC Number:

TN927.2

HU Jinlong, LIU Zifan, ZHOU Yiqing, CAO Huan, CHEN Daojin. Multi-beam resource allocation with interference avoidance for joint coverage with GSO and LEO satellite systems[J].Journal of Xidian University, 2025, 52(3): 12-25.

Figures/Tables 16

References 20

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EPFD门限值 /(dB·W·m^-2)	不超出EPFD门限值的时间百分比	参考带宽/kHz	参考天线直径/cm 和参考天线模型
-175.4	0	40	60 ITU-R S.1428-1
-174.0	90.000
-170.8	99.000
-165.3	99.730
-160.4	99.991
-160.0	100

参数对象	参数类型	参数名称	值
高轨卫星参数	星座参数	卫星轨道高度/km	35 786
	星座参数	卫星数量	22
	天线参数	天线半径/ m	2.5
		EIRP/(dBW·MHz^-1)	40
		系统总带宽/MHz	100
		工作频率/GHz	10.7
		天线增益模型	3GPP TR38.811
高轨地面接收站参数	天线参数	地面接收站数量	28
		天线半径/m	0.3
		天线模型	ITU-R S.1428-1
		天线噪声温度/K	150
		环境噪声温度/K	290
		天线噪声系数/dB	1.2
低轨卫星参数	星座参数	卫星轨道高度/km	550
		卫星个数	1 584
		星座构型	Walker Delta
		天线半径/m	0.3
		EIRP/(dBW·MHz^-1)	12.909
	天线参数	系统总带宽/MHz	100
		工作频率/GHz	10.7
		天线模型	3GPP TR38.811
		宽波束半功率张角/(°)	60
		点波束半功率张角/(°)	2
		单星波束数量	16
低轨地面站参数	天线参数	天线半径/m	0.3
		天线增益模型	3GPP TR38.811
		G·T^-1值/(dB·K^-1)	9.8
仿真系统参数	场景参数	系统仿真起止时间	2024-02-01 0:00~24:00
		调度周期/ms	60
		仿真时长/h	每整点选取6统计
		点波位个数	680
	拓扑参数	LEO卫星最小可视仰角/(°)	25
	拓扑参数	GEO卫星最小可视仰角/(°)	10

算法	JIMS-BH	LB-EE-BH	BBHIA-PG
(4:00:00)闲时	1.000 0	1.000 0	1.000 0
(19:00:00)忙时	0.864 4	0.778 0	0.835 8

时间段	EPFD 门限值(段)	不超过门限值占比要求	JIMS-BH 不超过门限值占比	LB-EE-BH 不超过门限值占比	BBHIA-PG 不超过门限值占比
(4:00:00)闲时	-174.0	90.000	94.41	91.98	90.13
	-170.8	99.000	98.40	99.97	99.00
	-165.3	99.730	100.00	100.00	99.94
	-160.4	99.991	100.00	100.00	100.00
	-160.0	100.000	100.00	100.00	100.00
(19:00:00)忙时	-174.0	90.000	83.01	93.95	90.00
	-170.8	99.000	94.95	99.91	99.00
	-165.3	99.730	99.98	100.00	100.00
	-160.4	99.991	100.00	100.00	100.00
	-160.0	100.000	100.00	100.00	100.00

Multi-beam resource allocation with interference avoidance for joint coverage with GSO and LEO satellite systems

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