Research/Patents/US 5648940
US 5648940Tier 3 — General Defense

PULSE CODED SONAR HAVING IMPROVED DOPPLER DETERMINATION FEATURE

Assignee

US Government

Filed as: UNITED STATES OF AMERICA AS REPRESENTED BY THE SECRETARY OF THE NAVY

Filed

Jan 29, 1982

Granted

Jul 15, 1997

Location

Arlington VA (defense contractors)

Abstract

The signal appearing at the receiver input of a pulse code active sonar dng a return echo period, is sampled, time compressed and stored in a memory. The time compressed sample is successive read-out of memory, with each individual "read-out" hetrodyned with a discretely different doppler compensation frequency signal. The successively processed read-outs are passed through an "on line" correlation detection device to determine presence of a correctly compensated pulse code echo.

Source: Google Patents

35 USC §181 Secrecy Order

Imposed

Jan 29, 1982

Rescinded

Feb 27, 1997

Duration

15 years, 1 month

Inventor

  • 1Unknown Unknown

Sensitive facility: Arlington VA (defense contractors)

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Back to patent indexSource: USPTO 35 USC §181 secrecy order records