Telecommunications – Transmitter and receiver at separate stations – Having measuring – testing – or monitoring of system or part
Reexamination Certificate
2004-03-23
2008-05-27
Anderson, Matthew (Department: 2618)
Telecommunications
Transmitter and receiver at separate stations
Having measuring, testing, or monitoring of system or part
C455S106000, C342S118000
Reexamination Certificate
active
07379710
ABSTRACT:
An object of the invention is to obtain a high-speed and high-accuracy radio-wave propagation characteristic forecasting system in combination with the launching method by correctly estimating a diffraction phenomenon when a ray passes the vicinity of an edge of a structure. To estimate a radio-wave propagation characteristic in accordance with the ray launching method, when a ray passes the vicinity of an edge of a structure, a diffracted wave is generated at the edge if the distance between the edge and the ray is smaller than the radius of a ray spread. Thereby, it is easy to combine the ray launching method with the conventional ray launching method and it is possible to estimate a high-speed high-accuracy radio-wave propagation characteristic also considering a ray diffracted wave.
REFERENCES:
patent: 9-33584 (1997-02-01), None
Proceedings of the IEEE, vol. 62, No. 11, Nov. 1974, “A Uniform Geometrical Theory of Diffraction for an Edge in a Perfectly Conducting Surface”.
Furukawa Hiroshi
Watanabe Yoshinori
Anderson Matthew
NEC Corporation
Young & Thompson
Yun Eugene
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