Yasser Attia Albagory

Learn More
In this paper, an efficient beamforming technique is proposed where the Kaiser window is designed and applied to the uniform concentric circular arrays (UCCA) for sidelobe reduction. This technique is based on tapering the current amplitudes of the rings in the array, where all elements in an individual ring are weighted in amplitude by the same value.(More)
In this paper, an array processing technique is proposed for the vertical linear array to generate flat-top ring-shaped cells in the High-Altitude Platforms cellular system. This new cell design will improve the power distribution and carrier-to-interference ratio (CIR) over the cell area through twoweighting functions applied to a vertical linear array;(More)
—This paper presents a new technique for location determination using the promising technique of stratospheric platform (SP) flying at altitudes 17-22 km high and a suitable Direction-of-Arrival technique (DOA). The SP system is preferable due to its superior communication performance compared to conventional terrestrial and satellite systems. The proposed(More)
In this paper, cellular communications from Stratospheric Platforms (SPs) is studied and the footprint analysis and design are demonstrated. In the analysis part two coverage schemes are discussed; flat-earth and real-earth models and the cell footprint is determined in each case. The flat-earth provides simple footprint equations describing the cell(More)