有限块长度的分集与复用
Diversity versus Multiplexing at Finite Blocklength
摘要：
基于多天线块无记忆瑞利衰落信道的最大信道编码速率的非渐近界，本文提出了分集复用折衷的有限块长分析。本文的界允许人们数值地评估对于哪些分组大小、天线数目和信道选择性程度，分集利用方案接近最优，并且当可用的空间自由度应该被用来提供空间复用时。这种有限块长度的多样性复用权衡的观点提供了见解延迟敏感的超可靠通信链路的设计。
英文摘要：
A finite blocklenth analysis of the diversity-multiplexing tradeoff is presented, based on nonasymptotic bounds on the maximum channel coding rate of multiple-antenna block-memoryless Rayleigh-fading channels.The bounds in this paper allow one to numerically assess for which packet size, number of antennas, and degree of channel selectivity, diversity-exploiting schemes are close to optimal, and when instead the available spatial degrees of freedom should be used to provide spatial multiplexing. This finite blocklength view on the diversity-multiplexing tradeoff provides insights on the design of delay-sensitive ultra-reliable communication links.
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