Signal processing arrangements

Details Signal processing arrangements Signal processing arrangements

1977-07-19

1979-03-20

Wise, Edward J.

Boots, shoes, and leggings

364516, 364415, G06G 712

Patent

active

041457412

ABSTRACT:
For systems, such as ultrasonic investigative systems, analyzing pulses received after transmission or reflection, it is known to apply swept gain to the received signal to overcome loss in propagation. This is achieved in this invention by converting the signals to log form and subtracting the log of the loss function. The signals may then be antilog converted. The subtraction can be by passing only signals above a threshold set at the figure to be subtracted.

REFERENCES:
patent: 3407355 (1968-10-01), Clark et al.
patent: 3504164 (1970-03-01), Farrell et al.
patent: 3832537 (1974-08-01), Marutani
patent: 4038530 (1977-07-01), Miyahara et al.

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