COMMUNICATION APPARATUS, AND COMMUNICATION SYSTEM

WIPO Patent Application WO/2017/221590

A1

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.

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TANAKA KATSUYUKI (JP)
KONDO FUMITAKA (JP)
JEONG MOONJAE (JP)
TERASHIMA TORU (JP)
NISHIYAMA FUMIHIRO (JP)

PCT/JP2017/018339

December 28, 2017

May 16, 2017

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SONY CORP (JP)

H04B13/00; H04B1/59; H04B5/02

WO2014161912A1

2014-10-09

JP2010028666A	2010-02-04
JP2010141469A	2010-06-24

See also references of EP 3474468A4

TSUBASA PATENT PROFESSIONAL CORPORATION (JP)

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