Secrecy effects of the Rayleigh-Hoyt and Hoyt-Rayleigh fading channels in ground-satellite communications

2017 ◽  
Author(s):  
Xian Liu
Keyword(s):  
Fading Channels ◽  
Rayleigh Fading ◽  
Satellite Communications ◽  
Rayleigh Fading Channels

scholarly journals Quasi-Orthogonal Time Division Multiplexing and Its Performances in Rayleigh Fading Channels

2012 ◽  
Vol 2012 ◽  
pp. 1-5
Author(s):  
Enchang Sun ◽  
Kechu Yi ◽  
Bin Tian ◽  
Dongying Zhang
Keyword(s):  
Fading Channels ◽  
Orthogonal Frequency Division Multiplexing ◽  
Rayleigh Fading ◽  
Carrier Frequency Offset ◽  
Satellite Communications ◽  
Rayleigh Fading Channels ◽  
Transmission Scheme ◽  
Time Division Multiplexing ◽  
Single Carrier ◽  
Time Division

This paper proposes an efficient transmission scheme, Quasi-Orthogonal Time Division Multiplexing (QOTDM), which employs the shift orthogonal property of the pulse function with raised-cosine spectral shape, and the signal waveforms are quasi-orthogonal in time domain. Comparing to orthogonal frequency division multiplexing (OFDM), QOTDM is less sensitive to carrier frequency offset and power amplifier nonlinearities while keeping a similar spectral efficiency with OFDM due to single-carrier characteristics. QOTDM is a suitable consideration for the downlink transmission such as in satellite communications. An upper bound of sample error probability (SER) is derived to evaluate the performance of QOTDM. Comparisons of QOTDM and OFDM in Rayleigh fading channels show that the proposed QOTDM system is better than that of OFDM system in terms of bit error rate (BER) in high Eb/No regions.

Spectrum Sensing Architecture and Use Case Study: Distributed Sensing over Rayleigh Fading Channels

2009 ◽  
Vol E92-B (12) ◽  
pp. 3606-3615 ◽  
Author(s):  
Chen SUN ◽  
Yohannes D. ALEMSEGED ◽  
Ha Nguyen TRAN ◽  
Hiroshi HARADA
Keyword(s):  
Fading Channels ◽  
Spectrum Sensing ◽  
Rayleigh Fading ◽  
Distributed Sensing ◽  
Rayleigh Fading Channels ◽  
Use Case

scholarly journals Application of m-ldpc codes in multipath Rayleigh fading channels

2021 ◽  
Vol 1738 ◽  
pp. 012037
Author(s):  
Hui Zhou ◽  
Rui Wang ◽  
Hairu Zhao ◽  
Zhenzhou An
Keyword(s):  
Fading Channels ◽  
Rayleigh Fading ◽  
Ldpc Codes ◽  
Rayleigh Fading Channels
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