Title:
データ転送
Document Type and Number:
Japanese Patent JP4699529
Kind Code:
B2
Abstract:
An apparatus and method are provided for transferring data through a submarine hull or other solid boundary using high frequency acoustic signals, so avoiding penetration of the hull or boundary. First and second transducers are mounted on opposed surfaces of the hull and aligned to communicate acoustic signals through the hull. The first transducer is driven by a continuous wave carrier signal modulated with data. A demodulator detects that data in the modulated acoustic signals received by the second transducer. Critically, the dimensions of the first and second transducers and the frequency of the carrier signal are selected so as to reduce the interference by triple transit signals through the hull to a level sufficiently low to enable continuous communication of data through the hull at a bit rate of at least 1 MHz. Carrier signals of the order of 40 MHz may be used to achieve data bit rates of the order of 15-18 MHz through the hull.
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Inventors:
Bug Show, John Martin
Kent, Lionel William John
Kent, Lionel William John
Application Number:
JP2008549937A
Publication Date:
June 15, 2011
Filing Date:
November 27, 2007
Export Citation:
Assignee:
BAE SYSTEMS plc
International Classes:
H04B11/00
Domestic Patent References:
| JP5252117A | ||||
| JP1202943A | ||||
| JP2000341221A | ||||
| JP4506438A | ||||
| JP5073079A |
Foreign References:
| US6037704 |
Attorney, Agent or Firm:
Kurata Masatoshi
Satoshi Kono
Makoto Nakamura
Takashi Mine
Yoshihiro Fukuhara
Toshio Shirane
Sadao Muramatsu
Nobuhisa Nogawa
Katsu Sunagawa
Ryo Hashimoto
Tetsuya Kazama
Satoshi Kono
Makoto Nakamura
Takashi Mine
Yoshihiro Fukuhara
Toshio Shirane
Sadao Muramatsu
Nobuhisa Nogawa
Katsu Sunagawa
Ryo Hashimoto
Tetsuya Kazama