Underwater acoustic transmission method and equipment to improve

Details Underwater acoustic transmission method and equipment to improve Underwater acoustic transmission method and equipment to improve

1994-06-28

1996-11-05

Eldred, J. Woodrow

Communications, electrical: acoustic wave systems and devices

Underwater system

Telemetering

367133, H04B 1100

Patent

active

055724850

ABSTRACT:
A method for underwater, acoustic transmission, characterized in that at the transmitting side, the signal to be transmitted first is sampled, digitized and stored and then un-sampled and un-digitized at a frequency less than the sampling frequency and is thus transmitted in analogue form, and in that at the receiving side the signal is correspondingly sampled, digitized and stored at the said un-sampling and un-digitizing frequency and then is re-read at the said sampling frequency.

REFERENCES:
patent: 3860760 (1974-01-01), Rittenbach
patent: 3867715 (1975-02-01), Geil
patent: 4200923 (1980-04-01), Theis
patent: 4236043 (1980-11-01), Bromley
patent: 4276624 (1981-06-01), Fisher et al.
patent: 4562559 (1984-12-01), Sharpe et al.
patent: 5136613 (1992-08-01), Dumpstre, III

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