Abbas Mohammed

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1Department of Signal Processing, Blekinge Institute of Technology, 372 25 Ronneby, Sweden 2Department of Electrical and Computer Engineering, Ben-Gurion University of the Negev, 84105 Beer-Shiva, Israel 3Department of Electronics, The University of York, York YO10 5DD, UK 4Dipartimento di Elettronica, Politecnico di Torino, 10129 Torino, Italy 5Adaptive(More)
One of the most critical issues regarding wireless networks regulation agencies is how to manage the available electromagnetic radio spectrum in a way that satisfies the needs of the huge growing in wireless systems both economically and technically, especially with the recent crowding in the available spectrum. Hence, building cognitive radio systems(More)
This paper proposes a Medium Access Control (MAC) protocol, termed as CD-MMAC, for wireless networks that utilizes multiple channels and incorporates opportunistic cooperative diversity dynamically to improve its performance. The IEEE 802.11b standard protocol allows the use of multiple channels available at the physical layer but its MAC protocol is(More)
The demand from social market for high speed broadband communications over wireless media is pushing the requirements of both the mobile and fixed networks. The past decade has witnessed tremendous advancement in the blooming development of mobile communications including mobile-to-mobile and mobile-to-fixed networks. Wireless fixed and cellular networks of(More)
This study was designed to evaluate the effect of ethanolic cherry sticks extract on the levels of glycoproteins in alloxan-induced diabetic mice. Forty-five adult male albino mice were divided equally into three groups: Group 1: control, Group 2: diabetic mice, Group 3: diabetic mice treated with cherry sticks extract as well as to eighteen mice treated(More)
The role of uplink power control is to suppress interference. Power control refers to set output power levels of transmitters, base stations in the downlink and User Equipment (UE) in the uplink. In this paper the performance of 3GPP Long Term Evolution (LTE) closed loop power control combined with fractional path loss compensation factor is evaluated by(More)
In this paper we address the potential gain of using compact MIMO antenna array configurations in conjunction with HAP diversity techniques in order to increase the data rates in HAP communication systems. Simulation results show that the MIMO system provides superior performance as compared to the single HAP case. Keywords-HAPs; Diversity; MIMO antennas;(More)