i would like to thank ALLAH for helping me to complete this thesis. I also wish to express my deep gratitude to academic supervisor Prof. Saleh A. Alshebeili for his invaluable guidance, stimulating advice, and continuous help through the entire period of this thesis. would like to thank Eng. Hitham Alsager for his help in programming. The list of people who have helped me is very long. I apolo...

Analog approaches are expected to offer dramatically low power consumption in smart antennas, especially for battery-operated wireless terminal devices. This paper overviews recently developed analog antenna techniques for smart beamforming. Hardware architectures, trainedand blind-control criteria, and adaptation algorithms are introduced along with state-of-the-art devices and a practical exp...

Absrruct-This paper discussed the spatial 'or angular spreading properties of wireless propagation in the urban microcell environment, which is of great interests of future mobile technology, especially in case of using smart antennas. Based on the elliptical scattering model, the power azimuth spectrum in microcell environments is derived and it is found that the result approximately followed ...

A dual-band circularly polarized stacked microstrip antenna for ISM Bands (2.45GHz & 5.8GHz) applications is designed and implemented. By stacking two different corner-truncated square patches in a dielectric substrate layer, the microstrip antenna for dual-frequency circular polarization (CP) can be achieved with −11.5 dB and −12.8 dB measured return loss for 2.45GHz and 5.8GHz. Semicircular g...

This work presents an application of convex optimization and algebraic geometry in devising secure, powerefficient, beam-steerable, and on-chip transmission systems for wireless networks. First, we introduce a passively controllable smart (PCS) antenna system that can be programmed to generate different radiation patterns in far field by adjusting its variable passive controller at every signal...

We report an investigation into the effect of using smart antennas on the performance of the slotted ALOHA protocol with capture in a mobile communications environment with Rayleigh and Log-normal fading. Our results demonstrate that by using smart antennas, we can achieve higher performance in terms of capture probability and throughput when compared to a conventional antenna system using the ...

System aspects of smart antenna (SA) technology in wireless communications such as SA receiver structure and algorithms, wireless network control and network planning are discussed. A classification of SA receivers and their algorithms is given in order to simplify orientation in very large amount of the proposed types. Several radio network planning and upgrading concepts with SA are evaluated...

This work describes a direction of arrival DOA based smart antenna system for GSM The focus lies on the developed antenna array processor that performs real time adaptive beamforming in every GSM frame The smart antenna consists of a uniform linear array with M elements eight transceiver trains and the Adaptive Antenna Array Processor A P The system allows digital beamforming in uplink and in d...

Smart Antennas (SA) and Multiple Input Multiple Output (MIMO) systems are considered as one of the key technologies for the third generation mobile communication systems and are now even being included in the UMTS standard [1]. With those technologies it is possible to improve the signal-to-noise ratio at the receiver and increase capacity in mobile radio systems. To test and evaluate new algor...

In this paper, we assess the performance of the slotted ALOHA protocol with capture in a mobile communications environment with Rayleigh and Log-normal fading when used with switched-beam smart antennas. We consider the configuration where one receiver is present at each base station and calculate the capture probability, its asymptotic value as the number of colliding packets tends to infinity...