Radiowave Propagation Effect on Linearization for Earth-Space Satellite Links

K. Chuang
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Abstract

Over the past decades, earth orbiting Satellites may employ different linearization techniques to cope with the increasing demand of spectral efficiency and data quality. Unlike the free-space transmission on earth, satellite links typically suffer from low signal to noise ratio and atmospheric impairments. This paper provides a framework to investigate the effect of radiowave propagation characteristics on non-linear power amplifiers. In particular, Nakagami-m fading is applied to the real-time amplifier response collected from a radio frequency testbed. The experimental results show that the prediction model in the context of digital pre-distortion correction could be optimized in order to index the atmospheric fade level and to compensate for the nonlinearities arising from the earth-space impairments.
无线电波传播对地空卫星链路线性化的影响
在过去的几十年里,地球轨道卫星可能采用不同的线性化技术来应对日益增长的频谱效率和数据质量的需求。与地球上的自由空间传输不同,卫星链路通常受到低信噪比和大气损伤的影响。本文提供了一个研究无线电波传播特性对非线性功率放大器影响的框架。特别地,Nakagami-m衰落应用于从射频试验台收集的实时放大器响应。实验结果表明,在数字预失真校正的背景下,可以优化预测模型,以索引大气衰减水平,并补偿地空损伤引起的非线性。
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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