Journal ArticleDOI
Antenna diversity in mobile communications
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TLDR
The mutual resistance condition offers a powerful design tool, and examples of new mobile diversity antennas are discussed along with some existing designs.Abstract:
The conditions for antenna diversity action are investigated. In terms of the fields, a condition is shown to be that the incident field and the far field of the diversity antenna should obey (or nearly obey) an orthogonality relationship. The role of mutual coupling is central, and it is different from that in a conventional array antenna. In terms of antenna parameters, a sufficient condition for diversity action for a certain class of high gain antennas at the mobile, which approximates most practical mobile antennas, is shown to be zero (or low) mutual resistance between elements. This is not the case at the base station, where the condition is necessary only. The mutual resistance condition offers a powerful design tool, and examples of new mobile diversity antennas are discussed along with some existing designs.read more
Citations
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Journal ArticleDOI
Exact representation of antenna system diversity performance from input parameter description
TL;DR: In this article, a simple formulation to compute the envelope correlation of an antenna diversity system is derived, which does not require the computation nor the measurement of the radiation pattern of the antenna system.
Journal ArticleDOI
A review of antennas and propagation for MIMO wireless communications
Michael A. Jensen,Jon W. Wallace +1 more
TL;DR: This paper reviews recent research findings concerning antennas and propagation in MIMO systems and considers issues considered include channel capacity computation, channel measurement and modeling approaches, and the impact of antenna element properties and array configuration on system performance.
Journal ArticleDOI
Mutual coupling in MIMO wireless systems: a rigorous network theory analysis
Jon W. Wallace,Michael A. Jensen +1 more
TL;DR: A new framework for the analysis of multiple-input multiple-output (MIMO) wireless systems is introduced to account for mutual coupling effects in the antenna arrays and the multiport interactions at transmit and receive are characterized by representing the channel using a scattering parameter matrix.
Journal ArticleDOI
Performance of maximal-ratio diversity systems in a correlated Nakagami-fading environment
TL;DR: The bit error rate (BER) performance of an M-branch maximal-ratio combiner (MRC) for the detection of signals in a correlated Nakagami-fading channel is analyzed and outage probabilities are calculated for the digital radio communication systems via the correlated fading channel.
Journal ArticleDOI
Antennas and propagation for on-body communication systems
Peter Hall,Yang Hao,Yuriy I. Nechayev,Akram Alomainy,Costas Constantinou,Clive Parini,Muhammad Ramlee Kamarudin,T.Z. Salim,D.T.M. Hee,Rostyslav Dubrovka,A.S. Owadally,Wei Song,Andrea Serra,Paolo Nepa,M. Gallo,M. Bozzetti +15 more
TL;DR: Investigations into channel characterization and antenna performance at 2.45 GHz show that for many channels, an antenna polarized normal to the body's surface gives the best path gain.
References
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Microwave Mobile Communications
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TL;DR: An in-depth and practical guide, Microwave Mobile Communications will provide you with a solid understanding of the microwave propagation techniques essential to the design of effective cellular systems.
Journal ArticleDOI
A statistical theory of mobile-radio reception
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Journal ArticleDOI
Optimum combining in digital mobile radio with cochannel interference
TL;DR: In this paper, the authors used analytical and computer simulation techniques to determine the performance of optimum combining when the received desired and interfering signals are subject to Rayleigh fading, and they showed that optimum combining is significantly better than maximal ratio combining even when the number of interferers is greater than number of antennas.
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