Two-dimensional acquisition system using circular array

Details Two-dimensional acquisition system using circular array Two-dimensional acquisition system using circular array

1983-09-28

1987-02-03

Blum, Theodore M.

Communications: directive radio wave systems and devices (e.g.,

Directive

Beacon or receiver

342378, 342 5, 364827, 364516, 364726, 324 77B, G01S 504, G01S 316, G06G 719

Patent

active

046411437

ABSTRACT:
A frequency-and-direction-finding system (10) employing a circular array (12) performs a two-dimensional Fourier transformation in space and time on the signals from the individual elements. The results of the transformation are fed to multipliers (22) that multiply them by correction factors that are derived from antenna patterns of the array but do not include the bearing-dependent factors in those systems. The result is an ensemble of values whose relative phases represent a spatial frequency proportional to the bearing angle of the source. Accordingly, a second fast-Fourier-transform circuit (26) operating on this ensemble of values produces an output only on an output port corresponding to the bearing angle of the source.

REFERENCES:
patent: 3872293 (1975-03-01), Green
patent: 4163978 (1979-08-01), Shepherd et al.
patent: 4203114 (1980-05-01), Gerst et al.
patent: 4209791 (1980-06-01), Gerst et al.
patent: 4216475 (1980-08-01), Johnson
patent: 4254417 (1981-03-01), Speiser
patent: 4263597 (1981-04-01), Bentley et al.
patent: 4338605 (1982-07-01), Mims
patent: 4382259 (1983-05-01), Becavin et al.

Affiliated with

Also associated with

Rating

Two-dimensional acquisition system using circular array does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Two-dimensional acquisition system using circular array, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Two-dimensional acquisition system using circular array will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1093403