Coherent geolocation system

Details Coherent geolocation system Coherent geolocation system

2008-01-01

2008-01-01

Phan, Dao (Department: 3662)

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

Directive

Beacon or receiver

C342S442000

Reexamination Certificate

active

07315280

ABSTRACT:
A coherent TOA system is provided for rapidly ascertaining the position of a pulse train emitter such as a radar. Techniques are provided to estimate the underlying repetition interval of the emitter and to do the TOA processing knowing which of the particular pulses is being detected at a collector, thus surmounting the effect of gaps in the received pulse stream. The subject system is preferable to conventional time-difference-of-arrival geolocation systems which require that each of the collecting platforms measure the same pulse from the emitter, and also to non-coherent TOA systems whose accuracy is less than that achievable with the subject coherent system for the same amount of data.

REFERENCES:
patent: 5119104 (1992-06-01), Heller
patent: 5191342 (1993-03-01), Alsup et al.
patent: 5708443 (1998-01-01), Rose
patent: 2004/0002347 (2004-01-01), Hoctor et al.
patent: 2004/0203870 (2004-10-01), Aljadeff et al.

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