Linearizing High Power Amplifiers for Modern Communication Systems
Sangeeta Bawa1 and Rajat Gupta2
Department of Electronics & Communication Engineering, Maharishi
Markandeshwar University, Mullana (Ambala), INDIA. Email: Sangeetabawa11@gmail.com
ABSTRACT: In modern communication system, high power amplifiers are the central component as their function is to amplify the signal and generate the required power for transmission of signals. For this purpose the communication system needs highly linear amplifiers. However with the use of multi carrier and complex modulated signals the response of the amplifier is nonlinear. To make the response of high power amplifiers linear; various linearization techniques are used. This paper presented the review of basic linearization techniques and discussed the advantages and drawbacks of various linearization techniques. In review it is to be noted that among all the linearization techniques pre-distortion technique is the historically one approach for reducing the distortion and make the response almost linear.
Keywords: High power amplifiers (HPAs), Linearization, Pre-distortion and adaptive linearization.
International eJournal of Mathematics and Engineering
Volume 4, Issue 3, Pages: 2190 - 2194