scholarly journals The Analysis of BER and SNR Based on High Altitude Platform Station in Wireless Communication Network

2017 ◽  
Author(s):  
Xiaoyang Liu ◽  
Wanping Liu ◽  
Chao Liu ◽  
Xiaoping Zeng
Keyword(s):  
Communication Network ◽  
Wireless Communication ◽  
High Altitude ◽  
High Altitude Platform ◽  
Wireless Communication Network ◽  
High Altitude Platform Station

scholarly journals The Channel Estimation and Modeling in High Altitude Platform Station Wireless Communication Dynamic Network

2017 ◽  
Vol 2017 ◽  
pp. 1-7 ◽  
Author(s):  
Xiaoyang Liu ◽  
Xiaoping Zeng ◽  
Chao Liu ◽  
Wanping Liu ◽  
Yihao Zhang
Keyword(s):  
Wireless Communication ◽  
Channel Estimation ◽  
High Altitude ◽  
Estimation Method ◽  
Dynamic Network ◽  
Estimation Performance ◽  
High Altitude Platform ◽  
Near Space ◽  
Value Decomposition ◽  
High Altitude Platform Station

In order to analyze the channel estimation performance of near space high altitude platform station (HAPS) in wireless communication system, the structure and formation of HAPS are studied in this paper. The traditional Least Squares (LS) channel estimation method and Singular Value Decomposition-Linear Minimum Mean-Squared (SVD-LMMS) channel estimation method are compared and investigated. A novel channel estimation method and model are proposed. The channel estimation performance of HAPS is studied deeply. The simulation and theoretical analysis results show that the performance of the proposed method is better than the traditional methods. The lower Bit Error Rate (BER) and higher Signal Noise Ratio (SNR) can be obtained by the proposed method compared with the LS and SVD-LMMS methods.

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.

scholarly journals Handover in a mobile wireless communication network –A Review Phase

2019 ◽  
Vol 1 (1) ◽  
pp. 6-13
Author(s):  
Rebin Abdullah Saeed
Keyword(s):  
Communication Network ◽  
Wireless Communication ◽  
Mobile Communication ◽  
Signal Quality ◽  
Radio Network ◽  
Current Channel ◽  
Mobile Wireless ◽  
Wireless Communication Network

Mobility is the features of mobile communication that makes it desirable by all and varied. The whole world is now attractive in wireless communication as it provides users' ability to communicate on-the-go. IT is accomplished by transferring users from a radio network to another. This process is called handover. Handover occurs by adjusting the duration of soft handovers, the size of the areas and either by cell crossing or by deterioration in the signal quality of the current channel — the brief overview of handover, Handover in WiMAX and LTE, types of handover, handover types solutions, usually used handover parameters, some methods employed in the literature and I contemporary the convergent fact for continuance in the area of mobile wireless communication Handover.

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