论文标题
与低分辨率ADC的空间相关的大型MIMO继电器系统
Spatially Correlated Massive MIMO Relay Systems with Low-Resolution ADCs
论文作者
论文摘要
在本文中，我们调查了大型的MIMO继电器系统，该系统将中继站（RS）将信号从多个远程用户转发到基站（BS）。大规模天线阵列与低分辨率类似物转换器（ADC）结合使用，在RS和BS配备了BS，以确保低成本的高光谱效率。考虑到RS和BS的存在始终存在的空间相关性，我们首先研究了规范通道估计过程，从中提取了可拖动的等效形式的通道估计值以进行进一步分析。在这些传输障碍以及ADC量化缺陷的情况下，我们得出了可实现率的封闭形式近似。然后，全面揭示了功率扩展，空间相关水平和ADC分辨率位的影响，以指导实际的系统部署和实施。提出了数值结果，以直接验证理论分析。
In this paper, we investigate the massive MIMO relay system, where the relay station (RS) forwards the signals from multiple remote users to the base station (BS). Large-scale antenna arrays in conjunction with low-resolution analog-to-digital converters (ADCs) are equipped at the RS and the BS to guarantee the high spectral efficiency with low cost. Considering the ever-present spatial correlation at both the RS and the BS, we first study the canonical channel estimation process, from which a tractable equivalent form of the channel estimate is extracted for further analysis. Under these transmission impairments along with the ADC quantization imperfection, we derive the closed-form approximation of the achievable rate. Then the impacts of power scaling, spatial correlation level, and ADC resolution bits are revealed comprehensively to guide the practical system deployment and implementation. Numerical results are presented to verify the theoretical analysis in a straightforward way.
