RADIO COMMUNICATION SYSTEM AND RADIO COMMUNICATION METHOD

PROBLEM TO BE SOLVED: To provide a radio communication system and a radio communication method that can achieve near MIMO transmission by signal processing with a little load.SOLUTION: In a radio communication system according to the invention, an amplitude ratio between a channel between facing ant...

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Bibliographic Details
Main Authors SEKI TOMOHIRO, NAKAGAWA TADAO, UEHARA KAZUHIRO, SAKAMOTO KAZUMITSU, HIRAGA TAKESHI
Format Patent
LanguageEnglish
Published 10.07.2014
Subjects
ELECTRIC COMMUNICATION TECHNIQUE
ELECTRICITY
MULTIPLEX COMMUNICATION
TRANSMISSION
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Summary:PROBLEM TO BE SOLVED: To provide a radio communication system and a radio communication method that can achieve near MIMO transmission by signal processing with a little load.SOLUTION: In a radio communication system according to the invention, an amplitude ratio between a channel between facing antenna elements and a channel between antenna elements in an oblique direction is one, and each antenna element is arranged so that phase difference will be 90 degrees. The radio communication system comprises: distributors (2211-2213) and phase shifters (2221-2223) that work as weighting units that weight each of signals from reception antenna elements (211-213) with an amplitude ratio 1:2:2, and give phase rotation of -135 degrees to a signal weighted corresponding to the first item of the amplitude ratio; and combiners (2231-2233) and receivers (231-233) that work as decoders that combine and decode the signal given the phase rotation and signals weighted corresponding to the respective second item and third item of the amplitude ratio.
Bibliography:Application Number: JP20120287925