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Diversity Systems (diversity + system)

Distribution by Scientific Domains

Engineering	100%

Selected Abstracts

The realization and analysis of pattern/polarization diversity in multiple input multiple output array

MICROWAVE AND OPTICAL TECHNOLOGY LETTERS, Issue 3 2008
Sung Ho Chae
Abstract This article proposes the pattern/polarization diversity array for multiple input multiple output applications by applying vertical and horizontal excitation. We show that pattern and polarization of antenna are changed due to vertical feeding. Then, we attempt to realize the two antenna diversity array by using different feeding method. As a result, the correlation factors with respect to the pattern and polarization diversity are investigated. Finally, the analysis of the diversity system in the view point of capacity is presented. © 2008 Wiley Periodicals, Inc. Microwave Opt Technol Lett 50: 561,566, 2008; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.23142 [source]

The high isolation dual-band inverted F antenna diversity system with the small N-section resonators on the ground plane

MICROWAVE AND OPTICAL TECHNOLOGY LETTERS, Issue 3 2007
Ki-Jin Kim
Abstract The high isolated dual-band inverted-F diversity systems for portable devices, operating in 2.4 GHz band (2400,2484 MHz) and 5.2 GHz band (5150,5350 MHz), are presented. To reduce the mutual coupling and get high isolation between two internal dual-band antennas, we proposed the small N-section resonators in the form of slots on the ground plane. The optimized small size resonators for high isolation, antenna radiation efficiency, and high effective diversity are analyzed. Because of their small size, N-section resonators can be widely used in small diversity systems that require high isolation between antennas. © 2007 Wiley Periodicals, Inc. Microwave Opt Technol Lett 49: 731,734, 2007; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.22238 [source]

Stochastic approach for output SINR computation at SC diversity systems with correlated Nakagami- m fading

EUROPEAN TRANSACTIONS ON TELECOMMUNICATIONS, Issue 5 2009
Daniela M. Milovi
In this paper, we derive the cumulative distribution function of the signal-to-interference,+,,noise ratio (SINR) achieved by the selection combining (SC) diversity receiver operating over correlated Nakagami- m channel in the presence of co-channel interference. Numerical and simulation results are presented to show the effects of fading severity and signal and interference imbalance on the system's performance. Copyright © 2009 John Wiley & Sons, Ltd. [source]

Performance analysis of wireless multihop diversity systems

INTERNATIONAL JOURNAL OF COMMUNICATION SYSTEMS, Issue 9 2008
Diomidis S. Michalopoulos
Abstract We study the performance of multihop diversity systems with non-regenerative relays over independent and non-identical Rayleigh fading channels. The analysis is based on the evaluation of the instantaneous end-to-end signal-to-noise ratio (SNR), depending on the type of the relay and the diversity scheme used. A closed-form expression is derived for the average end-to-end SNR, when fixed-gain relays and a maximal ratio combiner are used; also, an analytical expression formula for the average symbol-error rate (ASER) for the above case is presented. The results show that, as expected, multihop diversity systems outperform conventional telecommunication systems in terms of ASER when the same amount of energy is assumed to be consumed in both cases. Copyright © 2008 John Wiley & Sons, Ltd. [source]