一种用于移动无线OFDM固态功率放大器线性化的可调预失真器

2005 IEEE 7th CAS Symposium on Emerging Technologies: Circuits and Systems for 4G Mobile Wireless Communications Pub Date : 2005-06-23 DOI:10.1109/EMRTW.2005.195686

Byung Moo Lee, R. de Figueiredo

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引用次数: 13

摘要

正交频分复用(OFDM)技术存在的主要问题之一是其峰值平均功率比(PAPR)过高，高峰值平均功率比引起的非线性失真严重限制了固态功率放大器(SSPA)的效率。在本文中，我们描述了一种分析设计方法，该方法使用基于SSPA特性的稀疏而精确的预失真器(PD)模型。此外，PD配置是自调整的，也就是说，它可以通过跟踪SSPA特征的变化来自动重新调整自己，只需很少的(通常是两个)训练符号。

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A tunable pre-distorter for linearization of solid state power amplifier in mobile wireless OFDM

One of the major problems posed by orthogonal frequency division multiplexing (OFDM) is its high peak-to-average-power ratio (PAPR), which seriously limits the power efficiency of the solid state power amplifier (SSPA) because of the nonlinear distortion caused by high PAPR. In the present paper, we describe an analytical design approach that uses a sparse and yet accurate model for the pre-distorter (PD) based on the SSPA characteristics. Furthermore, the PD configuration is self-tuning, i.e., it can automatically re-adjust itself by tracking changes in the SSPA characteristics with very few (typically two) training symbols.

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2005 IEEE 7th CAS Symposium on Emerging Technologies: Circuits and Systems for 4G Mobile Wireless Communications

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