Means for extracting phase information for radio frequency direc

Details Means for extracting phase information for radio frequency direc Means for extracting phase information for radio frequency direc

1998-10-26

2000-01-04

Hellner, Mark

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

Directive

Beacon or receiver

342445, G01S 504

Patent

active

060115149

ABSTRACT:
The extraction of phase information for radio frequency (RF) direction of rival is attained by pre-detect sensing and quantization of differential phase of a RF wave impinging on two or more antenna apertures, based on sensing and encoding differential phase without the use of conventional detection, and quantizing phase at or near the leading edge of a pulse signal. This is accomplished by detection of an intermediate frequency (IF) carrier, and encoding leading-edge phase (for each channel) in terms of near-phase-difference between two reference-oscillator readings containing the differential phase information--encoded as differential reference-oscillator phase. Precision angle-of-arrival is then derived from the measured differential reference-oscillator phase.

REFERENCES:
patent: 5363103 (1994-11-01), Inkol
patent: 5724047 (1998-03-01), Lioio et al.
patent: 5815117 (1998-09-01), Kolanek

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