تصفح Academic حسب الموضوع "Radio frequencies"
السجلات المعروضة 1 -- 7 من 7
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A novel energy harvesting scheme for mixed fso-rf relaying systems
( Institute of Electrical and Electronics Engineers Inc. , 2019 , Article)In this correspondence paper, we consider the performance of a mixed free-space optical and radio frequency (FSO-RF) relaying system with energy harvesting in the existence of both atmospheric turbulence and pointing errors. ... -
Advanced experimental setup for the reliability characterization of radio-acoustic sensors in water pipes
( IEEE , 2011 , Conference Paper)The paper presents the design and construction of a test bench for the analysis and certification of radio-acoustic sensors inside conduits filled with liquids. It is a brand new test-set that integrates the capability to ... -
An experimental performance evaluation of the hybrid FSO/RF
( SPIE , 2017 , Conference Paper)This paper is a first attempt to study the effects of atmospheric turbulences on hybrid free space optics/ radio frequency (FSO/RF) transmission system in Doha, Qatar. The state of Qatar is characterized by a Mediterranean ... -
Atmospheric turbulence effect on hybrid FSO/RF systems
( IEEE Computer Society , 2017 , Conference Paper)This article is focused on the atmospheric turbulence attenuation and their effect on the hybrid free space optical and radio frequency (FSO/RF) under Qatar harsh and dry climate. Analysis has been done by calculating the ... -
Cooperative OFDM systems for UWAC with SNR-based relay selection schemes
( IEEE , 2012 , Conference Paper)In this paper, we investigate a multi-carrier multi-relay cooperative system with amplify-and-forward relaying over frequency-selective underwater acoustic channels. Relay selection rules rely on the maximization of ... -
Evaluation of FSO link throughput in Qatar
( Institute of Electrical and Electronics Engineers Inc. , 2015 , Conference Paper)Despite the vibrant advantages of Free Space Optics (FSO) technology and the variety of its applications, its widespread adoption has been hampered by rather disappointing link reliability for long-range links due to ... -
Nanomechanical properties of plasma treated polylactic acid
( Maney Publishing , 2015 , Article)In this work, a radio frequency discharged plasma generated in air atmosphere by pressure has been used to modify polylactic acid (PLA) surface. The results were evaluated through nanoindentation testing. Contact angle ...