Channel Coding Rate for Finite Blocklength Faster-Than-Nyquist Signaling
Channel Coding Rate for Finite Blocklength Faster-Than-Nyquist Signaling
复制标题
有限块长度的信道编码率快于奈奎斯特信号
DOI：
10.1109/lcomm.2020.3021976
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发表时间：
2021
期刊：
影响因子：
--
通讯作者：
V. Wong
中科院分区：
文献类型：
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作者：
Mostafa Mohammadkarimi;R. Schober;V. Wong
低延迟和高可靠性之间的基本权衡使得超可靠低延迟通信（URLLC）无线系统的设计具有挑战性。为了支持固定带宽的URLLC，快于奈奎斯特（FTN）信令是一种有前途的方法，因为它增加了自由度（即，信道使用），这可以用来提高可靠性。在这封信中，我们推导出近似的最大信道编码速率（MCCR）有限块长度FTN信令注水和等功率分配的解析表达式。我们表明，对于实际的非sinc平方根奈奎斯特脉冲，罚款的速率上产生的有限块长度可以显着减少非正交FTN传输。我们的研究结果表明，MCCR有限块长度FTN信令超过香农容量实现无限块长度和正交传输。
The fundamental tradeoff between low latency and high reliability makes the design of ultra-reliable low-latency communications (URLLC) wireless systems challenging. To support URLLC for a fixed bandwidth, faster-than-Nyquist (FTN) signaling is a promising approach since it increases the degrees of freedom (i.e., channel uses) per time interval, which can be exploited to improve reliability. In this letter, we derive analytical expressions for the approximate maximum channel coding rate (MCCR) for finite blocklength FTN signaling for water-filling and equal power allocations. We show that for practical non-sinc square-root Nyquist pulses, the penalty on the rate incurred due to the finite blocklength can be significantly reduced by non-orthogonal FTN transmission. Our results reveal that the MCCR for finite blocklength FTN signaling exceeds the Shannon capacity achieved for infinite blocklength and orthogonal transmission.