In this article, we revisit a recently proposed receiver design, named the splitting receiver, which jointly uses coherent and non-coherent processing for signal detection. By considering an improved signal model for the splitting receiver as compared to the original study in the literature, we conduct a performance analysis on the achievable data rate under Gaussian signaling and obtain a fundamentally different result on the performance gain of the splitting receiver over traditional receiver designs that use either coherent or non-coherent processing alone. Specifically, the original study ignored the antenna noise and concluded on a 50% gain in achievable data rate in the high signal-to-noise ratio (SNR) regime. In contrast, we include the antenna noise in the signal model and show that the splitting receiver improves the achievable data rate by a constant gap in the high SNR regime. This represents an important correction of the theoretical understanding on the performance of the splitting receiver. In addition, we examine the maximum-likelihood detection and derive a low-complexity detection rule for the splitting receiver for practical modulation schemes. Our numerical results give further insights into the conditions under which the splitting receiver achieves significant gains in terms of either achievable data rate or detection error probability.

中文翻译：

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联合相干和非相干处理的分裂接收机性能

在本文中，我们回顾了最近提出的接收器设计，称为分离接收器，它联合使用相干和非相干处理进行信号检测。通过考虑与文献中的原始研究相比改进的分路接收器信号模型，我们对高斯信令下可实现的数据速率进行了性能分析，并获得了分路接收器与传统接收器相比性能增益的根本不同结果单独使用相干或非相干处理的设计。具体而言，最初的研究忽略了天线噪声，得出的结论是在高信噪比 (SNR) 状态下可实现的数据速率提高了 50%。相比之下，我们将天线噪声包含在信号模型中，并表明分离接收器在高 SNR 状态下通过恒定间隙提高了可实现的数据速率。这代表了对分离接收机性能的理论理解的重要修正。此外，我们检查了最大似然检测并为实际调制方案的分裂接收机推导出低复杂度检测规则。我们的数值结果进一步深入了解分离接收器在可实现的数据速率或检测错误概率方面实现显着增益的条件。我们检查了最大似然检测并为实际调制方案的分离接收器推导出低复杂度检测规则。我们的数值结果进一步深入了解分离接收器在可实现的数据速率或检测错误概率方面实现显着增益的条件。我们检查了最大似然检测并为实际调制方案的分离接收器推导出低复杂度检测规则。我们的数值结果进一步深入了解分离接收器在可实现的数据速率或检测错误概率方面实现显着增益的条件。