scholarly journals Wireless Technologies to Connect Drones Under Beyond-Line-of-Sight Conditions: From Multi-Hop to High Altitude Platform

2022 ◽  
Vol 15 (3) ◽  
pp. 199-209
Author(s):  
Ryu MIURA ◽  
Takashi MATSUDA ◽  
Lin SHAN ◽  
Fumie ONO ◽  
Takeshi MATSUMURA
Keyword(s):  
High Altitude ◽  
Line Of Sight ◽  
Wireless Technologies ◽  
High Altitude Platform

A 2 × 20 Gbps hybrid MDM-OFDM–based high-altitude platform-to-satellite FSO transmission system

2020 ◽  
Vol 0 (0) ◽  
Author(s):  
Vel Murugan Gomathy ◽  
T. V. Paramasivam Sundararajan ◽  
C. Sengodan Boopathi ◽  
Pandiyan Venkatesh Kumar ◽  
Krishnamoorthy Vinoth Kumar ◽  
...  
Keyword(s):  
High Altitude ◽  
Orthogonal Frequency Division Multiplexing ◽  
High Speed ◽  
Satellite Communication ◽  
Input Power ◽  
Transmission System ◽  
Communication Link ◽  
Space Optics ◽  
High Altitude Platform ◽  
Mode Division Multiplexing

AbstractIn the present study, the application of free space optics (FSO) transmission system to realize a long-reach high-altitude platform (HAP)-to-satellite communication link has been exploited. High-speed information transmission without interference is accomplished using orthogonal frequency division multiplexing (OFDM). Further, the information capacity of the proposed system is increased by employing mode division multiplexing (MDM). We have investigated the proposed MDM-OFDM-HAP-to-satellite FSO transmission system performance over varying FSO range, diameter of the receiver, pointing errors, and input power. Also, an improved transmission performance of the proposed system using a square root module is reported.

scholarly journals Aerial RIS-Assisted High Altitude Platform Communications

2021 ◽  
pp. 1-1
Author(s):  
Ning Gao ◽  
Shi Jin ◽  
Xiao Li ◽  
Michail Matthaiou
Keyword(s):  
High Altitude ◽  
High Altitude Platform

scholarly journals Time-Varying Communication Channel High Altitude Platform Station Link Budget and Channel Modeling

Information ◽  
2018 ◽  
Vol 9 (9) ◽  
pp. 210
Author(s):  
Xiaoyang Liu ◽  
Hengyang Liu ◽  
Chao Liu ◽  
Ya Luo
Keyword(s):  
High Altitude ◽  
Channel Model ◽  
Channel Modeling ◽  
Link Quality ◽  
Communication Link ◽  
Noise Power ◽  
Golay Code ◽  
High Altitude Platform ◽  
Link Budget ◽  
High Altitude Platform Station

Because of the high BER (Bit Error Rate), low time delay and low channel transmission efficiency of HAPS (High Altitude Platform Station) in the near space. The link budget of HAPS and channel model are proposed in this paper. According to the channel characteristic, the channel model is set up, combined with different CNR (Carrier Noise Ratio), elevation angle, coding situations of wireless communication link by using Hamming code, PSK (Pulse Shift Keying) and Golay code respectively, then the situations of link quality and BER are analyzed. The simulation results show that the established model of the link budget and channel are suitable for the theoretical analysis results. The elevation of the HAPS communication link is smaller while the BER is increasing. The case of channel in the coding is better than in the un-coded situation. When every bit power and thermal noise power spectral density is larger, the BER of the HAPS communication link is becoming smaller.

Capacity calculation of TD-CDMA high altitude platform system

2011 ◽  
Vol 28 (2) ◽  
pp. 258-263
Author(s):  
Zhenyong Wang ◽  
Xiaowei Liu ◽  
Zhuoshi Li
Keyword(s):  
High Altitude ◽  
High Altitude Platform ◽  
Capacity Calculation ◽  
Platform System
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