Precision direction finding sensing systems and methods

Details Precision direction finding sensing systems and methods Precision direction finding sensing systems and methods

2005-01-04

2005-01-04

Phan, Dao (Department: 3662)

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

Directive

Beacon or receiver

C342S420000, C342S424000

Reexamination Certificate

active

06839025

ABSTRACT:
Methods and systems are provide for precision direction finding capabilities for a sensing system, the method comprising providing a sensing system that utilizes an amplitude direction finding scheme, receiving a received signal in at least two receivers of the energy wave sensing system, the received signal generated by a first object, comparing the received signal at each receiver in a processor of the sensing system utilizing an amplitude direction finding technique to produce amplitude direction finding technique data, the amplitude direction finding technique data indicative of course direction of the first object, processing the received signal further to determine angle of arrival data based on an interferometric technique to produce interferometric technique data, the interferometric data indicative of a more precise direction of the first object than provided by the amplitude direction finding technique and determining the direction finding data of the first object based on a residual phase error of the interferometric technique data and on an amplitude direction finding error of the amplitude direction finding technique data.

REFERENCES:
patent: 5381150 (1995-01-01), Hawkins et al.
patent: 5579011 (1996-11-01), Smrek
patent: 5592181 (1997-01-01), Cai et al.
patent: 5608411 (1997-03-01), Rose

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