Fading Statistics
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Dimitrios Selimis ◽  
Konstantinos Ntontin ◽  
Fotis Lazarakis ◽  
Katsuyuki Haneda

2019 ◽  
Vol 67 (4) ◽  
pp. 2622-2632 ◽  
Naveed Iqbal ◽  
Jian Luo ◽  
Robert Muller ◽  
Gerhard Steinbock ◽  
Christian Schneider ◽  

Technologies ◽  
2019 ◽  
Vol 7 (1) ◽  
pp. 9 ◽  
Sardar Gulfam ◽  
Syed Nawaz ◽  
Konstantinos Baltzis ◽  
Abrar Ahmed ◽  
Noor Khan

Extension of usable frequency spectrum from microwave to millimeter-wave (mmWave) is one of the key research directions in addressing the capacity demands of emerging 5th-generation communication networks. This paper presents a thorough analysis on the azimuthal multipath shape factors and second-order fading statistics (SOFS) of outdoor and indoor mmWave radio propagation channels. The well-established analytical relationship of plain angular statistics of a radio propagation channel with the channel’s fading statistics is used to study the channel’s fading characteristics. The plain angle-of-arrival measurement results available in the open literature for four different outdoor radio propagation scenarios at 38 GHz, as well as nine different indoor radio propagation scenarios at 28 GHz and 38 GHz bands, are extracted by using different graphical data interpretation techniques. The considered quantifiers for energy dispersion in angular domain and SOFS are true standard-deviation, angular spread, angular constriction, and direction of maximum fading; and spatial coherence distance, spatial auto-covariance, average fade duration, and level-crossing-rate; respectively. This study focuses on the angular spread analysis only in the azimuth plane. The conducted analysis on angular spread and SOFS is of high significance in designing modulation schemes, equalization schemes, antenna-beams, channel estimation, error-correction techniques, and interleaving algorithms; for mmWave outdoor and indoor radio propagation environments.

2018 ◽  
Vol 29 (10) ◽  
pp. e3487 ◽  
Waleed Iqbal Waseer ◽  
Syed Junaid Nawaz ◽  
Sardar M. Gulfam ◽  
M. Junaid Mughal

2018 ◽  
Vol 39 (2) ◽  
pp. 199-208
Himanshu Khanna ◽  
Mona Aggarwal ◽  
Swaran Ahuja

AbstractIn this work, we analyze the outage and error performance of a one-way inter-relay assisted free space optical link. The assumption of the absence of direct link between the source and destination node is being made for the analysis, and the feasibility of such system configuration is studied. We consider the influence of path loss, atmospheric turbulence and pointing error impairments, and investigate the effect of these parameters on the system performance. The turbulence-induced fading is modeled by independent but not necessarily identically distributed gamma–gamma fading statistics. The closed-form expressions for outage probability and probability of error are derived and illustrated by numerical plots. It is concluded that the absence of line of sight path between source and destination nodes does not lead to significant performance degradation. Moreover, for the system model under consideration, interconnected relaying provides better error performance than the non-interconnected relaying and dual-hop serial relaying techniques.

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