In this paper, we design a frame structure for unique word (UW) based transmission of multiple-input-multiple-output (MIMO) systems under doubly-dispersive wireless channel conditions. We elaborate an energy and spectral efficiency analysis of a MIMO UW-based system vs. a conventional MIMO cyclic prefix (CP)-based system. Considering the UW-based transmission for a MIMO multi-carrier, we derive its signal processing algorithms for channel estimation and joint channel-equalization-and-demodulation. Through theoretical derivations as well as extensive simulations, we show that the proposed MIMO UW-based system significantly outperforms the state-of-the-art approaches.

中文翻译：

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基于空间复用的 MIMO 多载波 UW 传输

在本文中，我们为多输入多输出 (MIMO) 系统在双色散无线信道条件下的基于唯一字 (UW) 的传输设计了一种帧结构。我们详细阐述了基于 MIMO UW 的系统与基于传统 MIMO 循环前缀 (CP) 的系统的能量和频谱效率分析。考虑到 MIMO 多载波的基于 UW 的传输，我们推导出其用于信道估计和联合信道均衡和解调的信号处理算法。通过理论推导和广泛的模拟，我们表明所提出的基于 MIMO UW 的系统显着优于最先进的方法。