Design of an Adaptive Predistorter for Solid State Power Amplifier in Wireless OFDM Systems

被引：2

作者：

de Figueiredo, Rui J. P. ^{[1
]}

Fang, Lin ^{[1
]}

Lee, Byung Moo ^{[2
]}

机构：

[1] Univ Calif Irvine, Dept Elect Engn & Comp Sci, Lab Intelligent Signal Proc & Commun, Irvine, CA 92697 USA

[2] KT, Cent R&D Lab, Seoul 137792, South Korea

来源：

JOURNAL OF ELECTRICAL AND COMPUTER ENGINEERING | 2009年 / 2009卷

关键词：

D O I：

10.1155/2009/515797

中图分类号：

TP [自动化技术、计算机技术];

学科分类号：

0812 ;

摘要：

Orthogonal frequency division multiplexing (OFDM) is a powerful modulation choice for wideband wireless communication systems. However, its high peak-to-average power ratio greatly limits the high power amplifier (HPA) power efficiency. Here, we present the design of an adaptive predistorter to compensate the distortion caused by the HPA. Specifically, we deal with the implementation issue of the proposed predistorter in Lee and de Figueiredo's work (2006). The performance improvement by predistorter is verified by both floating-point simulation and fixed-point simulation, where the latter includes the distortion effects from the hardware. The bit widths for OFDM signals, ADC, and DAC are evaluated, and the bit width of 10 is shown to be sufficient for the hardware design. Copyright (C) 2009 Rui J. P. de Figueiredo et al.

引用

页数：5

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