A digital phase and amplitude feedforward correction system

Yu, Deshuang; Conway, Paul

doi:10.1109/pac.1993.309331

Cited by 1 publication

(1 citation statement)

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“…This real time correction is achieved by measuring system variations due to the actual signal instead of system variations due to a reference signal. It can be defined as a periodical feedback correction system since the actual frequency is not high enough to require the use of a feed-forward correction system [2,3].…”

Section: Introductionmentioning

confidence: 99%

High-Accuracy Gain and Phase Regulation System for Real Time Compensation

Lagutère

Tahmi

Russat

2006

2006 IEEE International Symposium on Industrial Electronics

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This paper describes a circuit designed to automatically adjust the gain and the phase of a signal processing system. This circuit uses the AD8302 component from Analog Devices for phase and gain measurement. Additional circuits are included to improve its overall stability (temperature and input power level). As a first step, the compensation system "learns" its actual gain and phase performances. Then, it drives a phase shifter and a VGA (Variable Gain Amplifier) to cancel the measured deviation between the reference and the corresponding actual value. The measurement accuracy of our compensation system for a standard commercial temperature range (0°C to +85°C) is +0.28 dB for gain and +1.150 for phase when signal frequency is 900 MHz.

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Section: Introductionmentioning

confidence: 99%