H - Electricity – 04 – B
Patent
H - Electricity
04
B
351/19, 325/42
H04B 7/02 (2006.01) H04B 7/08 (2006.01)
Patent
CA 1128134
TITLE OF THE INVENTION A Space Diversity Reception System Having Compensation Means of Multipath Effect ABSTRACT OF THE DISCLOSURE A space diversity reception system which minimizes the inband amplitude and/or phase dispersion by controlling the phase shifter is described. According to the present invention, the interference waves in the two antenna outputs are combined in anti-phase condition. The phase shifter control direction is decided by the sign of the two parameters. One of them is difference between two antenna levels at the center frequency of the pass-band, and the other is the differ- ence of the combined signal levels at the extreme edges of the pass-band. The control means comprises four detectors for detecting said levels, two subtractors for providing said level differences between them, and the control circuit for deciding the phase shifter control direction. - 1 -
344382
Izumi Horikawa
Shozo Komaki
Yoshiharu Okamoto
Borden Ladner Gervais Llp
Nippon Telegraph & Telephone Public Corporation
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