Proceedings of the Korea Electromagnetic Engineering Society Conference (한국전자파학회:학술대회논문집)

The Korean Institute of Electromagnetic Engineering and Science (한국전자파학회)
권호 표지

Adaptive Control Method for a Feedforward Amplifier

  • Kang, Sang-Gee (Advanced Radio Technique Department, ETRI) ;
  • Yi, Hui-Min (Radio Science and Engineering Department, Chungnam National University) ;
  • Hong, Sung-Yong (Radio Science and Engineering Department, Chungnam National University)
  • Published : 2003.11.15
Download PDF
⟨ Previous Next ⟩

Abstract

A feedforward amplifier, which is composed of several components, is an open loop system. Therefore, feedforward amplifiers are apt to deteriorate the performance according to the environmental changes even though the cancellation performance and the linearization bandwidth of feedforward systems are superior to other linearization methods. A control method is needed for maintaining the original performance of feedforward amplifiers or to keep the performance within a little error bounds. In this paper, an adaptive control method, which has a good convergence characteristic and is easy to implement, is suggested. The characteristics of the suggested control method compare with the characteristics of other control methods and the simulation results are presented.

Keywords