Accession Number:

ADD014679

Title:

Phase Accumulator-Bearing Tracker.

Descriptive Note:

Patent, Filed 4 Jun 84, patented 4 Sep 90,

Corporate Author:

DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s):

Report Date:

1990-09-04

Pagination or Media Count:

5.0

Abstract:

This patent discloses passive sonar bearing tracker having spaced arrays wherein the target bearing is a function of the electrical phase angle of the signal between the arrays. Confidence in the bearing estimate is increased in spite of the relatively narrow bandwidth of the signal and a low signal-to-noise ratio by sequentially bandpass frequency filtering each very narrow component of the narrow-band signal, computing the phase difference between respective filter pairs, accumulating the phase differences over a selected time period and displaying the phase difference calibrated as a bearing. In a second embodiment the individual differences are weighted according to the magnitude of the frequency signal at the associated very narrow band. Keywords Patents. jhd

Subject Categories:

  • Acoustic Detection and Detectors

Distribution Statement:

APPROVED FOR PUBLIC RELEASE