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A Study on the Design of Linear Power Amplifier at Digital Control System  

김갑기 (목포해양대학교 해양전자통신공학부)
조학현 (목포해양대학교 해양전자통신공학부)
조기량 (여수대학교 전자통신공학과)
Publication Information
Journal of the Korea Institute of Information and Communication Engineering / v.6, no.5, 2002 , pp. 724-730 More about this Journal
Abstract
Digital communication systems are required to cause the minimum interference to adjacent channels, they must therefore employ the linear power amplifiers. In respect to linear power amplifiers, there are many linearization techniques. Feedforward power amplifier represent very wide bandwidth and high linearization capability. In the feedforward systems, overall efficiency is reduced due to the loss of delay line. In this paper, delay filter instead of transmission delay line adapted to get more high efficiency. Experimental results showed that ACLR (Adjacent Channel Leakage Ratio) has improved 17.43(dB), which is added 3.44(dB) by using the delay filter.
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  • Reference
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