Diversity gains in wireless systems with oscillating-beam smart antennas: an evaluaton via geometric-based stochastic channel models using point scatterers

Seyed Alireza Zekavat; Carl R. Nassar

doi:10.1117/12.447388

2 November 2001 Diversity gains in wireless systems with oscillating-beam smart antennas: an evaluaton via geometric-based stochastic channel models using point scatterers

Seyed Alireza Zekavat, Carl R. Nassar

Author Affiliations +

Proceedings Volume 4529, Enabling Technologies for 3G and Beyond; (2001) https://doi.org/10.1117/12.447388
Event: ITCom 2001: International Symposium on the Convergence of IT and Communications, 2001, Denver, CO, United States

Abstract

A smart antenna with a carefully controlled time-varying beam pattern can create a channel with a small coherence time. This small channel coherence time can be used by the mobile station to achieve time diversity benefit, thereby enhancing performance. In this work, the coherence time induced by antenna arrays with time-varying beam-patterns is evaluated using the so-called geometric-based stochastic channel model (GSCM). Here, we assume a circular coverage area in an urban environment and we treat buildings (or parts of buildings) as point scatterers (dimensionless). We demonstrate a relationship between coherence time and antenna array control parameters, and show that 9-fold-time diversity can be created via time-varying beam patterns.

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Seyed Alireza Zekavat and Carl R. Nassar "Diversity gains in wireless systems with oscillating-beam smart antennas: an evaluaton via geometric-based stochastic channel models using point scatterers", Proc. SPIE 4529, Enabling Technologies for 3G and Beyond, (2 November 2001); https://doi.org/10.1117/12.447388

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