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

Abstract

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

CLC Number:

TP393

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.

Figures/Tables 12

References 13

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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

Application Research of High Mobility Spacecraft Based on Low Earth Orbit Broadband Satellite Internet

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