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Patent Searching and Data

Document Type and Number:
WIPO Patent Application WO/2017/221590
Kind Code:
A communication system according to the present disclosure has at least one communication apparatus comprising a transmission circuit and a reception circuit, the transmission circuit comprising: a transmission unit for selectively transmitting, via an antenna unit, either a first transmission signal including first transmission data or a second transmission signal consisting of at least one of a periodic signal having a fixed frequency and a narrow-band modulated signal based on lower-speed data than the first transmission data; and a signal generation unit for generating the second transmission signal, the reception circuit comprising: a reception unit for receiving, via the antenna unit, the first transmission signal and the second transmission signal; a narrow-band detection unit for detecting the second transmission signal in a narrow band to output a narrow-band detection signal; and a determination unit for determining the pesence or absence of a significant signal or the presence or absence of a significant signal variation with respect to the narrow-band detection signal, and outputting a determination signal.

TANAKA, Katsuyuki (1-7-1 Konan, Minato-k, Tokyo 75, 〒1080075, JP)
KONDO, Fumitaka (1-7-1 Konan, Minato-k, Tokyo 75, 〒1080075, JP)
JEONG, Moonjae (1-7-1 Konan, Minato-k, Tokyo 75, 〒1080075, JP)
TERASHIMA, Toru (1-7-1 Konan, Minato-k, Tokyo 75, 〒1080075, JP)
NISHIYAMA, Fumihiro (1-7-1 Konan, Minato-k, Tokyo 75, 〒1080075, JP)
Application Number:
Publication Date:
December 28, 2017
Filing Date:
May 16, 2017
Export Citation:
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SONY CORPORATION (1-7-1, Konan Minato-k, Tokyo 75, 〒1080075, JP)
International Classes:
H04B13/00; H04B1/59; H04B5/02
Domestic Patent References:
Foreign References:
Other References:
See also references of EP 3474468A4
Attorney, Agent or Firm:
TSUBASA PATENT PROFESSIONAL CORPORATION (3F Sawada Building, 15-9 Shinjuku 1-chome, Shinjuku-k, Tokyo 22, 〒1600022, JP)
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