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首页> 外文会议>31st AIAA international communications satellite systems conference >Sensitivity Analysis of Multicarrier Digital Pre-distortion/ Equalization Techniques for Non-linear Satellite Channels
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Sensitivity Analysis of Multicarrier Digital Pre-distortion/ Equalization Techniques for Non-linear Satellite Channels

机译：非线性卫星信道多载波数字预失真/均衡技术的灵敏度分析

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On-board joint power amplification of multiple-carrier DVB-S2 signals using a single High-Power Amplifier (HPA) is an emerging configuration that aims to reduce flight hardware and weight. However, effects specific to such a scenario degrade power and spectral efficiencies with increased Adjacent Channel Interference caused by non-linear characteristic of the HPA and power efficiency loss due to the increased Peak to Average Power Ratio (PAPR). The paper studies signal processing techniques that counteract for both aspects enabling efficient multicarrier on board amplification. Digital pre-distortion (DPD) at the gateway and equalization (EQ) at the User Terminal are the designed avenues of attack to mitigate the non-linear effects and improve power as well as spectral efficiencies. This paper builds on our initial work in Ref.l that performed a survey on the adaptability of various compensation techniques to the considered scenario and short-listed the most favourable ones. Preliminary performance analysis of these techniques was undertaken with Signal to Interference Ratio (SINR) as the figure of merit. The contribution of this work over Ref. 1 includes : (a) a full DVB-S2 chain is simulated with the chosen techniques with Total Degradation (TD) as the figure of merit and (b) a sensitivity analysis is performed to study the dependence of the pre-distortion/ equalization performance ( measured as TD) on the channel parameters.
机译：使用单个高功率放大器（HPA）对多载波DVB-S2信号进行机载联合功率放大是一种新兴的配置，旨在减少飞行硬件和重量。但是，由于HPA的非线性特性导致的相邻信道干扰增加以及由于峰均功率比（PAPR）增加而导致的功率效率损失，针对这种情况的特定效果会降低功率和频谱效率。本文研究了在两个方面抵消的信号处理技术，从而实现了有效的多载波板载放大。网关处的数字预失真（DPD）和用户终端处的均衡（EQ）是旨在减轻非线性影响并提高功率和频谱效率的设计途径。本文基于我们在参考文献1中的初始工作，该工作对各种补偿技术对所考虑的情况的适应性进行了调查，并从中筛选出了最有利的一种。这些技术的初步性能分析以信号干扰比（SINR）为优值进行。这项工作对参考文献的贡献。图1包括：（a）使用选定的技术以DVQ-S2总质量（TD）为优值模拟完整的DVB-S2链，并（b）进行灵敏度分析以研究预失真/均衡性能的依赖性（以TD测量）在通道参数上。

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