Browsing Electrical & Electronics Engineering by Author "Nouri, Hatef"
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Adaptive free space optical communication system with multiple apertures
Nouri, Hatef; Uysal, Murat (2016)In the current literature on free space optical (FSO) communication, typically open-loop designs are considered where the knowledge of channel state information is only available at the receiver. This is mostly favorable ... -
Adaptive MIMO FSO communication systems with spatial mode switching
Nouri, Hatef; Uysal, Murat (IEEE, 2018-08)In this paper, we propose an adaptive multiple-input multiple-output (MIMO) free-space optical (FSO) system with dynamic adaptation between spatial modes of operation. The proposed adaptive system supports three MIMO modes. ... -
Adaptive modulation for FSO IM/DD systems with multiple transmitters and receivers
Nouri, Hatef; Sait, S. M.; Uysal, Murat (IEEE, 2023-02)Atmospheric turbulence is a major impairment in free space optical (FSO) communication systems. Since turbulence induced fading exhibits quasi-static characteristics, reliable feedback of channel state information is ... -
A custom-design atmospheric channel emulator for the performance evaluation of free space optical communication systems
Kebapci, Burak; Miramirkhani, Farshad; Nouri, Hatef; Uysal, Murat (IEEE, 2017)In this paper, we present our custom design atmospheric channel emulator for free space optical (FSO) system evaluations in a controlled environment. Our emulator is in the form of an atmospheric chamber with dimensions ... -
Diversity-multiplexing tradeoff for log-normal fading channels
Nouri, Hatef; Uysal, Murat (IEEE, 2016-07)Although there has been a growing interest on the study of diversity-multiplexing tradeoff (DMT), the existing works are mostly restricted to the outcomes reported for Rayleigh, Rician, and Nakagami fading channels. In ... -
Experimental investigation of pointing errors on drone-based FSO systems
Tosun, Anılcan; Nouri, Hatef; Uysal, Murat (IEEE, 2020-10-05)Airborne free space optical (FSO) links can be efficiently used for backhaul/fronthaul needs of future cellular networks. Unlike terrestrial FSO links where a fixed connection between two buildings is considered, airborne ... -
Experimental investigation on the effect of wavelength on aperture averaging in FSO communications
Nouri, Hatef; Uysal, Murat (The Optical Society, 2020-06-01)Atmospheric turbulence is a major impairment in free-space optical (FSO) communication systems. Based on the fact that the size of receiver aperture is much larger than operation wavelength, aperture averaging extracts ... -
Information theoretic analysis and optimization of underwater acoustic communication systems
Nouri, Hatef; Uysal, Murat (IEEE, 2013)In this paper, we investigate the information theoretical limits of underwater acoustic channel with intersymbol interference. Under the assumptions of sparse and frequency-selective Rician fading channel and non-white ... -
Information theoretical performance analysis and optimisation of cooperative underwater acoustic communication systems
Nouri, Hatef; Uysal, Murat; Panayirci, E. (IEEE, 2016-05)In this study, the authors investigate the information theoretical limits on the performance of single-carrier cooperative underwater acoustic communication systems in the presence of intersymbol interference. The authors ... -
Information theoretical performance analysis and optimization of underwater acoustic communication systems
Nouri, Hatef (2013-08)Underwater wireless communication is a rapidly growing field of research and engineering as its applications, which were once exclusively military, are extending into commercial fields. The need for underwater wireless ... -
Information theoretical performance limits of single-carrier underwater acoustic systems
Nouri, Hatef; Uysal, Murat; Panayırcı, E.; Senol, H. (IEEE, 2014)In this study, the authors investigate the information theoretical limits on the performance of point-to-point single-carrier acoustic systems over frequency-selective underwater channels with intersymbol interference. ... -
Optical wireless communications – an emerging technology
Uysal, Murat; Nouri, Hatef (IEEE, 2014)Optical wireless communication (OWC) enables wireless connectivity using infrared, visible or ultraviolet bands. With its powerful features such as high bandwidth, low cost and operation in an unregulated spectrum, OWC can ...
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