Signal processor for narrow band sonar signals

Details Signal processor for narrow band sonar signals Signal processor for narrow band sonar signals

1970-09-01

1998-05-12

Pihulic, Daniel T.

Communications, electrical: acoustic wave systems and devices

Echo systems

Returned signal used for control

367100, G01S 1500

Patent

active

057516588

ABSTRACT:
A digital signal processor wherein a bit stream containing correlation inmation for a large sample size is converted into several basic correlation functions, each of which covers a small number of samples within the large input sample. Each basic correlation function is examined to determine whether it contains a valid sonar signal, and the original bit stream is then integrated over those time periods for which the corresponding basic correlation functions indicate the presence of a valid sonar signal. The resulting optimized digital correlation function is converted into an analog signal.

REFERENCES:
patent: 3046545 (1962-07-01), Westerfield
patent: 3380018 (1968-04-01), Littrell et al.
patent: 3517172 (1970-06-01), Dillard

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