论文标题
使用量化的CSI反馈的多源大型MIMO的模拟与混合编码
Analog Versus Hybrid Precoding for Multiuser Massive MIMO with Quantized CSI Feedback
论文作者
论文摘要
在这封信中，我们研究了在有限的反馈通道上具有子连接结构的下行链路多源多源多输入（MIMO）系统的性能。理论上对系统进行了紧密的近似值，该系统具有纯模拟预编码和混合预编码。量化的模拟和数字预编码的效果在派生的表达式中表征。此外，据揭示，纯模拟预码的表现优于某些条件下使用最大比率传播（MRT）或零强迫（ZF）的混合预编码，理论上我们从理论上表征了相对于信号到噪声比率（SNR）的封闭形式的条件（SNR），用户的数量和反馈数的数量。数值结果验证了雷利通道和MMWave通道上的得出结论。
In this letter, we study the performance of a downlink multiuser massive multiple-input multiple-output (MIMO) system with sub-connected structure over limited feedback channels. Tight rate approximations are theoretically analyzed for the system with pure analog precoding and hybrid precoding. The effect of quantized analog and digital precoding is characterized in the derived expressions. Furthermore, it is revealed that the pure analog precoding outperforms the hybrid precoding using maximal-ratio transmission (MRT) or zero forcing (ZF) under certain conditions, and we theoretically characterize the conditions in closed form with respect to signal-to-noise ratio (SNR), the number of users and the number of feedback bits. Numerical results verify the derived conclusions on both Rayleigh channels and mmWave channels.
