This work addresses the problem of integrating a new signal in the Galileo E1 band. Thus, the arising question is how the existing multiplexing methods can be efficiently used or modified to integrate a new binary signal in the Galileo E1 band with the existing Galileo E1 signals. To this end, in this study, the authors first select three efficient multiplexing methods from the state of the art (i.e. interplexing, POCET and CEMIC methods) to multiplex a new Galileo signal along with the Galileo E1 legacy signals in a constant envelope modulation. Moreover, they evaluate their performance and main advantages and drawbacks. Secondly, in order to improve both performance and flexibility/adaptability of the multiplexing method, a modified CEMIC method, called ACEMIC, is proposed. This method allows to design modulations which maximise the power efficiency with respect to a given peak-to-average-power-ratio constraint. Finally, they compare the previous multiplexing methods in terms of power signal distribution, constant envelope fluctuation and power efficiency.

中文翻译：

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在Galileo E1频段添加新信号的新复用方法

这项工作解决了在Galileo E1频段集成新信号的问题。因此，出现的问题是如何有效地使用或修改现有的复用方法，以将Galileo E1频带中的新二进制信号与现有Galileo E1信号进行积分。为此，在这项研究中，作者首先从最新技术中选择了三种有效的复用方法（即，复用，POCET和CEMIC方法），以恒定的包络调制将新的Galileo信号与Galileo E1传统信号复用。而且，他们评估其性能以及主要的优缺点。其次，为了改善复用方法的性能和灵活性/适应性，提出了一种改进的CEMIC方法，称为ACEMIC。该方法允许设计调制，以相对于给定的峰均功率比约束最大化功率效率。最后，他们在功率信号分布，恒定包络波动和功率效率方面比较了以前的复用方法。