Farukh Nadeem

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Free Space Optics (FSO) is now a well established access technology, better known for its robustness in transmitting large data volumes in an energy efficient manner. However the BER performance of a FSO ground-link is adversely affected by cloud coverage, harsh weather conditions, and atmospheric turbulence. Fog, clouds and dry snow play a detrimental role(More)
Free space optics (FSO) links in the troposphere are highly dependent on different atmospheric effects, which vary according to different climatic conditions. For terrestrial FSO links, fog is the most critical of all atmospheric effects causing optical signal attenuations up to 480 dB/km in dense maritime fog environments and 130 dB/km in moderate(More)
Optical wireless links offer gigabit per second data rates and low system complexity. For ground-space and or terrestrial communication scenarios, these links suffer from atmospheric loss mainly due to fog, scintillation and precipitation. We investigate here the impact of fog, rain and snow effects and evaluate their performance on the basis of attenuation(More)
In this paper, the performance of Radio on Free Space Optics (RoFSO) a cost effective and efficient method of wireless transmission that supports high data rate of communication as compared to optical fiber, whose data rate is limited by dispersion and nonlinearity is studied. The performance primarily depends on atmospheric conditions which is the recent(More)
Wireless Optical Communication Links (OCL), or Free Space Optics (FSO) links involving optical ground stations (OGS) are highly influenced by the earth atmosphere due to the interaction of the optical wave with particles of different size and shape. Fog, clouds, rain and snow cause significant signal attenuation thus limiting the performance of OCL. In this(More)
A well known disadvantage of Free Space Optics (FSO) or optical wireless communication is its sensitivity on local weather conditions-primarily to fog and precipitation, resulting in substantial loss of optical signal power over the communication path. Results of a propagation study on a terrestrial Free Space Optics (FSO) link at 950nm and 850 nm on 79.8 m(More)
Optical wireless link provides high bandwidth solution to the last mile access bottleneck. However, an appreciable high availability of the link is the basic requirement of any communication application. Free space optics (FSO) links are highly weather dependent and fog is the major attenuating factor reducing the link availability. Hybrid networks(More)
Free Space Optics (FSO) links get attraction due to high bandwidth and the flexibility of wireless communication links. However weather patterns like fog and heavy snow fall effect the availability of FSO. Microwave links operating at 40-43 GHz can be considered as back up link due to similar properties regarding offered data rates and flexibility of set(More)