Calibration of plural - channel system

Communications: directive radio wave systems and devices (e.g. – Testing or calibrating of radar system – By monitoring

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

342377, G01S 740

Patent

active

051112086

ABSTRACT:
In a system having plural signal-carrying channels, a phase shift is introduced between a signal in one of the channels and a reference signal for calibrating the individual channels. The reference signal is obtained by adding samples of signals in other ones of the channels. The phase shift is introduced by phase-shift apparatus responsive to a command signal directing a continuous monotonic increment of phase. The phase incrementing introduces a frequency shift (a serrodyne), which produces a beat-frequency signal for mixing a channel signal with the reference signal. The beat-frequency signal is phase locked to a modulation patern of a command signal, whereby a measurement of phase (or delay) can be made between the two signals for calibration of each channel within the system. Separate calibrations may be made for different presumed values of system delay so as to obtain a value of system delay which causes the calibration sequence to converge to fixed values of phase shift introduced in each of the channels.

REFERENCES:
patent: 3727223 (1973-04-01), O'Meara
patent: 4104637 (1978-08-01), Nielson
patent: 4176354 (1979-11-01), Hsiao et al.
patent: 4517570 (1985-05-01), Gray, Jr.
patent: 4520361 (1985-05-01), Frazita
patent: 4532517 (1985-07-01), LaBerge et al.
patent: 4538150 (1985-08-01), Bone, Jr.
patent: 4639732 (1987-01-01), Acoraci et al.
patent: 4673939 (1987-06-01), Forrest
patent: 4724440 (1988-02-01), Lopez et al.

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Calibration of plural - channel 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 Calibration of plural - channel system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Calibration of plural - channel system will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-1415829

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.