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Weak guidance modal analysis of an infrared lightguide with a four-lobed core cross section

✍ Scribed by Vivek Singh; B. Prasad; S. P. Ojha

Publisher: John Wiley and Sons
Year: 1999
Tongue: English
Weight: 129 KB
Volume: 23
Category: Article
ISSN: 0895-2477
DOI: 10.1002/(sici)1098-2760(19991105)23:3<163::aid-mop10>3.0.co;2-0

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✦ Synopsis

tion predictions in heterogeneous urban environments with arbitrary building layouts and heights. The method is based on image theory, and has high computational efficiency compared to the precedent methods resorting to the ray-launching scheme. The presented hybrid method gives relatively accurate prediction results for propagation over buildings with irregular heights and spacings in practical computing time. The model surpasses empirical channel models, and provides a bounty of additional information, including rms delay spread, angle of arrival, and overall wideband channel impulse response. The model was validated with measurements in a heterogeneous urban environment of Munich, Germany. Further improvements can be expected from the inclusion of a more accurate model for terrain and vegetation effects.

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