论文标题
毫米波大量MIMO的多用户延迟对齐调制
Multi-User Delay Alignment Modulation for Millimeter Wave Massive MIMO
论文作者
论文摘要
延迟对齐调制（DAM）是一种新型的宽带通信技术，它利用了毫米波（MMWave）的高空间分辨率和多条路径稀疏性（MMWAVE）大量多输入多输入（MIMO）系统来减轻符号间符号间的符号间干扰（ISI），而无需依赖传统技术，例如诸如通道平均水平均衡或多元循环的传统技术。在本文中，我们将大坝技术扩展到多用户MMWave大量MIMO通信系统。我们首先通过表明远无渐进分析的形式表明，当基站（BS）天线的数量远远大于通道路径的总数时，DAM能够消除ISI和用户间干扰（IUI），并具有简单的延迟预补偿和基于每个路径的最大比率（MRT）光束射击。然后，我们通过以每路的方式考虑三种经典的传输横梁成形策略，即捷运，零强度（ZF）和正规化的零强度（RZF）来研究一般的多用户大坝设计。仿真结果表明，多用户大坝可以显着胜过仅使用每个用户最强的通道路径的基准单载波ISI缓解技术。
Delay alignment modulation (DAM) is a novel wideband communication technique, which exploits the high spatial resolution and multi-path sparsity of millimeter wave (mmWave) massive multiple-input multiple-output (MIMO) systems to mitigate inter-symbol interference (ISI), without relying on conventional techniques like channel equalization or multi-carrier transmission. In this paper, we extend the DAM technique to multi-user mmWave massive MIMO communication systems. We first provide asymptotic analysis by showing that when the number of base station (BS) antennas is much larger than the total number of channel paths, DAM is able to eliminate both ISI and inter-user interference (IUI) with the simple delay pre-compensation and per-path-based maximal ratio transmission (MRT) beamforming. We then study the general multi-user DAM design by considering the three classical transmit beamforming strategies in a per-path basis, namely MRT, zero-forcing (ZF) and regularized zero-forcing (RZF). Simulation results demonstrate that multi-user DAM can significantly outperform the benchmarking single-carrier ISI mitigation technique that only uses the strongest channel path of each user.
