Power Amplifiers Linearization Based on Gain Predistortion Used in Third Generation Systems

Publish Year: 1385
نوع سند: مقاله کنفرانسی
زبان: English
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شناسه ملی سند علمی:

ICEE14_060

تاریخ نمایه سازی: 25 تیر 1387

Abstract:

Efficient RF power amplifiers used in third generation systems require linearization in order to reduce adjacent channel inter-modulation distortion, without sacrificing efficiency. Digital baseband predistortion is a highly cost-effective way to linearize Power amplifiers (PAs), but most existing architectures assume that the PA has a memoryless nonlinearity. For wider bandwidth applications such as wideband codedivision multiple access (WCDMA) or wideband orthogonal frequency-division multiplexing (WOFDM), PA memory effects can no longer be ignored. In this paper we proposed a new technique for adaptation of digital predistorter that considers memory effects in power amplifiers. This new technique is validated by using a 1.9 GHz 85W LDMOS power amplifier and various signals such as 3-carrier CDMA and IS95 CDMA.

Authors

P Pvarahram

Student Member, IEEE, Department of Electrical Engineering, Tarbiat Modares University.

Z. Atlasbaf

Department of Electrical Engineering, Tarbiat Modares University.

A. Farrokh Payam

Department of Electrical Engineering, Esfahan University of Technology

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  • Wangnyong Woo, Marvin Miller, and J. Stevenson Kenney, «Predistortion Linearization ...
  • Wright and Duller, *Experimental performance of an Adaptive Digital Linearized ...
  • Changsoo Eun and Edward J. Powers, 4A New Volterra Predistorter ...
  • Hyunchul Ku, and J. Stevenson Kenney, «Behavioral Modeling of Nonlinear ...
  • Hyunchul Ku, and Michael D. McKinley, "Quantifying Memory Effects in ...
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