低轨宽带卫星互联网支持高动态空间飞行器应用研究

doi:10.11959/j.issn.2096-8930.2023013

摘要/Abstract

摘要：

针对高动态空间飞行器大航程、高动态等飞行运动特征和高速通信应用需求，提出基于低轨宽带卫星互联网支持高动态空间飞行器应用的设计方案，包括系统体系架构、卫星载荷波束、高动态接入、空间链路预算、平台终端架构等，重点分析和验证动态适应性、卫星切换和连续通信服务等关键问题，为进一步的终端研制和飞行试验打下基础，对基于低轨宽带卫星互联网的高动态空间飞行器管控和通信应用的工程实现具有重要参考意义。

关键词: 低轨宽带卫星, 卫星互联网, 高动态空间飞行器, 动态适应性, 连续通信

Abstract:

For the high rate communication demand in long range and high dynamic environment based on LEO broadband satellite internet, the design of system structure, payload beam form, high dynamic access process, satellite link budget and terminal architecture were proposed to support the dual communication of high mobility spacecraft.Also, the key problem of dynamic adaptability and continuous communication when satellite switching were analyzed, laid a foundation for the terminal research and development, the flight test of high mobility spacecraft, etc.The result was consultant significance for future engineering implementation to the management and control of high mobility spacecraft based on LEO broadband satellite internet.

Key words: LEO broadband satellite, satellite internet, high mobility spacecraft, dynamic adaptability, continuous communication

中图分类号:

TP393

朱亮, 戚少博, 王鹏, 张世杰. 低轨宽带卫星互联网支持高动态空间飞行器应用研究[J]. 天地一体化信息网络, 0, (): 103-110.

Liang ZHU, Shaobo QI, Peng WANG, Shijie ZHANG. Application Research of High Mobility Spacecraft Based on Low Earth Orbit Broadband Satellite Internet[J]. Space-Integrated-Ground Information Networks, 0, (): 103-110.

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参数	值	备注
EIRP/dBW	30	频率=20 GHz
自由空间损耗/dB	178.9	链路距离=1 047 km
大气损耗/dB	0	-
雨衰/dB	8	-
其他损失/dB	0	-
落地电平/dBW	-156.9	-
接收天线增益/dBi	21	T₀=290 K
等效噪声温度/dBK	28	NF=5 dB
(G/T)/(dB·K^-1)（60°）	-7	玻尔兹曼常数=1.38×10^-23J/K
(C/N₀)/dB	64.7	-
速率/(kbit·s^-1)	1 000	-
(E_b/N₀)/dB	4.7	-
(E_b/N₀)(门限)/dB	1.8	BER = 10^-7(DVB-S2, AWGN 信道) QPSK, LDPC 1/2
链路余量/dB	2.9	-

参数	值	备注
EIRP/dBW（60°）	36	频率=30 GHz
自由空间损耗/dB	182.4	链路距离=1 047 km
大气损耗/dB	0	-
雨衰/dB	8	-
其他损失/dB	0	-
落地电平/dBW	-154.4	-
接收天线增益/dBi	19	T₀=290 K
等效噪声温度/dBK	28	NF=5 dB
(G/T)/(dB·K^-1)（60°）	-9	玻尔兹曼常数=1.38×10^-23J/K
(C/N₀)/dB	65.2	-
速率/(kbit·s^-1)	1 000	-
(E_b/N₀)/dB	5.2	-
(E_b/N₀)(门限)/dB	1.8	BER = 10^-7(DVB-S2, AWGN 信道) QPSK, LDPC 1/2
链路余量/dB	3.4	-

频点	符号率	调制方式	编码方式	编码速率	用户速率	信号接收电平
1.650 GHz	5 Msps	QPSK	LDPC+BCH	1/4	2.5 Mbit/s	-63 dBm

起始锁定时多普勒频移/Hz	锁定时的多普勒频移/Hz	状态	锁定时间/s
216 387	305 805	锁定	2.89
445 003	522 874	锁定	2.74
643 277	710 072	锁定	2.01
1 201 500	1 201 400	锁定	0.99
-978 581	-1 008 280	锁定	0.98
-1 094 980	-1 122 890	锁定	1.01
-1 172 760	-1 154 970	锁定	2.00