Quadrature measurement and calibration of a vector modulator

Details Quadrature measurement and calibration of a vector modulator Quadrature measurement and calibration of a vector modulator

1990-09-28

1992-06-02

Chin, Stephen

Pulse or digital communications

Repeaters

Testing

332103, 455 671, H04B 346

Patent

active

051193990

ABSTRACT:
Method and apparatus for calibration of a vector modulator of electrical communication signals that produces an output composed of the vector sum of two modulated signals that are phase shifted relative to one another. The two output component signals are first calibrated to produce zero quadrature angle error, then compensated for carrier leakage and balanced to provide equal output amplitudes for equal data input amplitudes. Iteration of these calibrations is not necessary. The already-adjusted parameters remain calibrated as subsequent adjustments of other parameters are made.

REFERENCES:
patent: 3842247 (1974-10-01), Anderson
patent: 4006418 (1977-02-01), Liskov et al.
patent: 4258436 (1981-03-01), Campbell
patent: 4449222 (1984-05-01), Crossett, III et al.
patent: 4717894 (1988-01-01), Edwards et al.
patent: 4816783 (1989-03-01), Leitch
patent: 4843351 (1989-06-01), Edwards et al.
patent: 4890301 (1989-12-01), Hedberg
Wayne Tomasi, Electronic Communications Systems, Prentice Hall, New Jersey, 1988, Chap. 13.

Affiliated with

Also associated with

Rating

Quadrature measurement and calibration of a vector modulator does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Quadrature measurement and calibration of a vector modulator, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Quadrature measurement and calibration of a vector modulator will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2235563