Method and apparatus for the generation and transmission of sign

Details Method and apparatus for the generation and transmission of sign Method and apparatus for the generation and transmission of sign

1984-12-24

1988-03-01

Moskowitz, Nelson

Communications, electrical: acoustic wave systems and devices

Seismic prospecting

Offshore prospecting

367 39, 367 41, 375 22, 370 8, G01V 138

Patent

active

047290668

ABSTRACT:
A transmission which requires only a single source to transmit is generated in accordance with a code which is binary (a pulse train having two levels which produces a specific harmonic line spectrum). The pulses are generated by pulse time modulation of the position and duration of pulses in a sweep which extends to the upper end of the spectrum.

REFERENCES:
patent: 4070550 (1978-01-01), Miller et al.
patent: 4207962 (1980-06-01), Bauyoucos
patent: 4257108 (1981-03-01), Igel
patent: 4295213 (1981-10-01), Mifsud
A. Okazaki, "Pulse Duration Modulation Applicable To Narrow Band Transmission", 1/78, J. Inst. Telv. Eng. Jpn., vol. 32, #1, pp. 33-39, Abst. Only Provided.
Cunningham, A., "Some Alternate Vibrator Signals", 12/79, Geophysics, vol. 44, #12, pp. 1901-1914.

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