Communications: electrical – Selective – Monitoring in addition to control
Patent
1962-11-19
1976-02-17
Farley, Richard A.
Communications: electrical
Selective
Monitoring in addition to control
340 5R, 343100CL, H04B 1100, G01S 966
Patent
active
039394611
ABSTRACT:
4. A signal-reconstitution method for signals transmitted through a bounded medium comprising the steps of:
Propagating a first signal from one point in said bounded medium;
Receiving the propagated signal at another point in said bounded medium;
Propagating the received signal from one of said points;
Receiving the second propagated signal at the other of said points;
Reversing the second received signal with respect to time;
Propagating said reversed signal from one of said points in said bounded medium; and,
When a reflecting object is present at the other of said points, receiving an echo signal at the point at which the reversed signal was propagated, the form of said echo signal approximating the form of said first signal.
REFERENCES:
patent: 2864072 (1958-12-01), Blake
Smith, Geophysics, Vol. 23, No. 1, Jan. 1958, pp. 44-50, 54 & 57.
Backus, Geophysics, Vol. 24, No. 2, Apr. 1959, pp. 233, 234 & 261.
Applebaum L. B.
Farley Richard A.
Schneider P.
The United States of America as represented by the Secretary of
Tompkins R. I.
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