Communications: directive radio wave systems and devices (e.g. – Directive – Including antenna orientation
Patent
1995-05-30
1996-11-12
Barron, Jr., Gilberto
Communications: directive radio wave systems and devices (e.g.,
Directive
Including antenna orientation
4552771, 4552772, 343703, 342350, G01S 100
Patent
active
055744664
ABSTRACT:
A method for wireless communication system planning includes, in a first embodiment, determining an image tree (500), based on a transmitter location (401) and the reflective (415) and diffractive (425) surfaces within a coverage region, and limiting the image tree to exclude branching for higher order images requiring more than a predetermined number of reflections and/or diffractions, or potential child images corresponding to surfaces not within the scope of the parent image (530, 560). Based on the image tree and propagation path back-tracing (620) a received signal quality measure (e.g., power) is determined for each transmit location. By comparing the different received signal powers an optimal receiver unit location is determined. Further, by back-tracing for further antenna locations/combinations, and comparing for diversity effects (864, 865), overall coverage qualities can be determined for each antenna combination and compared to yield optimal base diversity antenna locations (867).
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Jorgen Bach Andersen, Theodore S. Rappaport, and Susumu Yoshida, "Propagation Measurements and Models for Wireless Communications Channels", IEEE Communications, Jan. 1995 vol. 33 No. 1 pp. 42-49.
Reed John D.
Tang Yuqiang
Barron Jr. Gilberto
Motorola Inc.
Phan Dao L.
Sonnentag Richard A.
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