Communications: directive radio wave systems and devices (e.g. – Testing or calibrating of radar system – By monitoring
Patent
1997-08-12
2000-06-06
Pihulic, Daniel T.
Communications: directive radio wave systems and devices (e.g.,
Testing or calibrating of radar system
By monitoring
G01S 740
Patent
active
060724269
ABSTRACT:
In order to provide for dynamic calibration of a radio altimeter which utilizes frequency modulated continuous waves having a triangular wave form, a selected frequency output of the altimeter is compared, during a calibration interrupt of the output of the altimeter, to a predetermine value for that frequency and if it differs, the frequency is adjusted to the correct value. Each frequency in the triangular wave is individually calibrated during separate calibration mode interrupts. Specifically, each frequency is calibrated by coupling a portion of the altimeter signal to a prescaler circuit and using the prescaler circuit in combination with a modulation frequency counter to input a value representing the frequency to a control microprocessor. The microprocessor then compares this value to a desired frequency and adjusts a value in a memory that is used to control the frequency output of a voltage controlled oscillator that is used to generate the frequency modulated continuous wave.
REFERENCES:
patent: 3364437 (1968-01-01), Loposer
patent: 3535651 (1970-10-01), Peterson
patent: 3579281 (1971-05-01), Kam
patent: 4272729 (1981-06-01), Riley
patent: 4468638 (1984-08-01), Kyriakos
patent: 4488123 (1984-12-01), Kurihara
patent: 4593287 (1986-06-01), Nitardy
patent: 4754277 (1988-06-01), Voyce
patent: 4851080 (1989-07-01), Howe
patent: 4904956 (1990-02-01), Dennis
patent: 4931749 (1990-06-01), Walters
patent: 4945360 (1990-07-01), Trummer et al.
patent: 4998217 (1991-03-01), Holcomb
patent: 4999636 (1991-03-01), Landt et al.
patent: 5175509 (1992-12-01), Taylor
patent: 5210539 (1993-05-01), Voyce
patent: 5252981 (1993-10-01), Grein
patent: 5369376 (1994-11-01), Leblebiciogiu
patent: 5440275 (1995-08-01), Erb
Burrer, et al., "Resonant Silicon Accelerometers in Bulk MicroMachining Technology--An Approach," J. Micro. Systems. 5(2):122-130, 1996.
Allied-Signal Inc.
Pihulic Daniel T.
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