1. Spatiotemporal propagation characteristics of non-line-of-sight using low antenna-height base station in microcellular environment.
- Author
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Sekizawa, Shinya, Taira, Kazumasa, Kamio, Yukiyoshi, and Mizuno, Mitsuhiko
- Subjects
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RADIO wave propagation , *RADIO waves , *MOBILE communication systems , *WIRELESS communications , *RADIO transmitter fading , *ANTENNAS (Electronics) - Abstract
As a remedy to multipath fading in land mobile communication, adaptive antenna arrays combined with equalizers have been proposed. For hardware realization and adaptive algorithm development in order to alleviate fading by temporal and spatial processing, it is necessary to clarify the spatiotemporal characteristics of the propagation channel such as the delay time and direction of arrival of multipath waves. In a microcell using a low antenna-height base station, the spatiotemporal propagation characteristics are measured for line-of-sight and non-line-of-sight propagation at 3.35 GHz. Characteristics of these channels have been presented. With regard to non-line-of-sight propagation, the measured spatiotemporal characteristics are modeled and the angular spread and the delay spread of the arriving waves are quantitatively evaluated. Also, when the transmission characteristics of fading prevention techniques by spatiotemporal processing are evaluated by computer simulation, an example of the delay-azimuth profiles that is usable as a reference for setting the conditions for fading is presented. © 2003 Wiley Periodicals, Inc. Electron Comm Jpn Pt 1, 86(7): 11–21, 2003; Published online in Wiley InterScience (
www.interscience.wiley.com ). DOI 10.1002/ecja.10032 [ABSTRACT FROM AUTHOR]- Published
- 2003
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