Communications: directive radio wave systems and devices (e.g. – Determining distance – Phase comparison
Patent
1988-10-11
1992-09-15
Tarcza, Thomas H.
Communications: directive radio wave systems and devices (e.g.,
Determining distance
Phase comparison
342118, G01S 906
Patent
active
051481782
ABSTRACT:
The range (R) to a target (12) is precisely determined by controlling the amplitude of the carrier before modulation using a feedback signal derived from the detected return. The amplitude of the carrier is adjusted (40) so that all return pulses have a constant amplitude. Hence, for any given range, all return pulses cross threshold at the same time, thereby eliminating ranging errors due to phase distortion. The return pulses are threshold detected (54) and converted to a CW signal, which is then down converted. The phase information, which is indicative of target range, is preserved in the down conversion process and is extracted by phase comparison (72) with a reference signal to determine the target range.
REFERENCES:
patent: 2422074 (1947-06-01), Bond
patent: 2710959 (1955-06-01), Pierce
patent: 2979715 (1961-04-01), Hammond, Jr.
patent: 3165739 (1965-01-01), Long et al.
patent: 3191171 (1965-06-01), Zuefeldt et al.
patent: 3830567 (1974-08-01), Riegl
Hardy, Jr. Arthur H.
Holzer William C.
Denson-Low W. K.
Hellner Mark
Santa Barbara Research Center
Schubert W. C.
Tarcza Thomas H.
LandOfFree
Precision ranging system does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Precision ranging system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Precision ranging system will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-739263