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http://dx.doi.org/10.5394/KINPR.2002.26.3.295

Design of IMT-2000 Feedforward Digital Adaptive Linear Power Amplifier  

Kim, Kab-Ki (Mokpo National Maritime University, Faculty of Marine Electronic. and Communication Eng.)
Park, Gyei-Kark (Mokpo National Maritime University Faculty of Maritime Transportation System)
Publication Information
Journal of Navigation and Port Research / v.26, no.3, 2002 , pp. 295-302 More about this Journal
Abstract
Currently digital communication system adapt various digital modulation schemes. All these 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 has improved 17.04dB which is added 2.54dB by using the delay filter.
Keywords
linear power amplifiers; feedforward power amplifier; delay filter; digital modulation schemes;
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  • Reference
1 N. Pothecary,(1999) Feedforward Linear Power Am-plifier, Artech House Inc.
2 T. T. Ha,(1981) Solid state microwave amplifier design, John Wiely & Sons Inc.
3 M. Johnson and M. Faulkner,(1993) 'Linearization of multi-carrier power amplifier', IEEE
4 J. K. Cavers,(1995) 'Adaptation behavior of a feed-forward amplifier lineahzer', IEEE Trans. Vehicular Tech., vol. 44, no. 1, pp. 31-40, Feb   DOI   ScienceOn
5 Y. Wang, Y. Qian and T. Itoh,(2000) 'A polar gradient algorithm for adaptive feedforward amplifier linearizer', IEEE Topical Workshop on Power Amplifiers for Wireless Sept
6 Y. Yang, Y. Kim, and B. Kim,(2000) 'Digital Controlled Adaptive Feedforward Amplifier for IMT-2000 Band', IEEE MTT-S Dig., Boston, June.
7 Y. Chen, B. P. Ng and A. C. Kot,(2000) 'Adaptive Algorithms for Feed-Forward Power Amplifier Lineahzer', IEEE Trans. Microwave Theory & Tech
8 A. Wood, W. Brakensick, C. Dragon and W. Burger, (1998) '120 Watt 2GHz Si LDMOS RF power transistor for PCS base station applications', MTT-S. Inter-national Microwave Symposium Digest., vol. II, pp.707-710   DOI
9 P. B. Kenington,(2000) High-Linearity RF Amplifier Design, Artech House Inc.
10 R. Prasad and T. Ojanpera,(1998) "An Overview of CDMA Evolution Toward Wideband CDMA", IEEE Communications Surveys, Fourth Quarter, vol. 1, no. 1   DOI