Unified Feedback Beamforming Digital Predistorter

Suguru Habu, Y. Yamao, H. Suzuki
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引用次数: 1

Abstract

A novel digital predistortion (DPD) architecture for amplitude- and phase- weighted beamforming (BF) transmitter is proposed. Based on the analysis of BF nonlinear radiation characteristics over-the-air, the proposed DPD with a simple unified feedback circuit can reduce nonlinear radiation in every direction. The performance of proposed DPD is evaluated through computer simulation assuming Chebyshev-weighed BF arrays. The results show that the proposed architecture can suppress nonlinear radiation to less than -45 dB in all direction, which is similar to the full DPD architecture that requires individual feedback circuit for each antenna element.
统一反馈波束形成数字预失真器
提出了一种用于幅度和相位加权波束形成发射机的新型数字预失真(DPD)结构。在分析BF无线非线性辐射特性的基础上,提出了一种采用简单统一反馈电路的DPD,可以减少各方向的非线性辐射。采用切比舍夫加权BF阵列,通过计算机仿真对所提DPD的性能进行了评价。结果表明,所提出的结构可以在所有方向上抑制非线性辐射小于-45 dB,这与需要每个天线单元单独反馈电路的全DPD结构相似。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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