Title:
ACOUSTIC COMMUNICATION DEVICE AND ACOUSTIC SIGNAL COMMUNICATION METHOD
Document Type and Number:
Japanese Patent JP3929299
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To enhance transmission velocity of acoustic communication.
SOLUTION: A transmitter 1 performs both or either of amplitude modulation based on transmission information and phase modulation, and modulation by a signal which shows a window function, to each carrier of a plurality of pulse signals, and transmits a plurality of modulated signals in order. A receiver 2 receives a plurality of acoustic signals transmitted by the transmitter 1 in order, and converts them into electric signals. Then, the receiver 2 Fourier- transforms the converted signals, reads both or either of the phase value and the amplitude value in frequency of carriers, and demodulates the communication signal, based on the read-out value.
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Inventors:
Hirohisa Sakuma
Jun Fujiwara
Jun Fujiwara
Application Number:
JP2001380206A
Publication Date:
June 13, 2007
Filing Date:
December 13, 2001
Export Citation:
Assignee:
Tokyo Gas Co., Ltd.
International Classes:
H04Q9/00; G10L19/00; H04B11/00; H04L25/03; H04L27/00; H04L27/26; (IPC1-7): H04B11/00; G10L19/00; H04L27/00; H04Q9/00
Domestic Patent References:
| JP50141205A | ||||
| JP4351093A | ||||
| JP9200868A | ||||
| JP10210099A | ||||
| JP6252891A | ||||
| JP5026919A | ||||
| JP7264258A | ||||
| JP11017644A | ||||
| JP2001036497A | ||||
| JP5252578A | ||||
| JP4311116A | ||||
| JP2002374579A |
Attorney, Agent or Firm:
Hayashi Tsunetoku
Kenji Doi
Kenji Doi
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