Ultra-reliable low-latency communication (URLLC) requires short packets of data transmission. It is known that when the packet length becomes short, the achievable rate is subject to a penalty when compared to the channel capacity. In this paper, we propose to use faster-than-Nyquist (FTN) signaling to compensate for the achievable rate loss of short packet communications. We investigate the performance of a combination of a low complexity detector of FTN signaling used with nonbinary low-density parity-check (NB-LDPC) codes that is suitable for low-latency and short block length requirements of URLLC systems. Our investigation shows that such combination of low-complexity FTN signaling detection and NB-LDPC codes outperforms the use of close-to-optimal FTN signaling detectors with LDPC codes in terms of error rate performance and also has a considerably lower computational complexity.

翻译：众所周知,当数据包长度短时,可实现的比率会比频道容量受到处罚。在本文中,我们提议使用比Nyquist(FTN)更快的信号,以补偿短封通信的可实现速度损失。我们调查一个低复杂度的FTN信号检测器的结合性能,该信号器与适合URLLC系统低延迟和短区块长度要求的非二元低密度对等检查(NB-LDPC)代码使用。我们的调查显示,低兼容性FTN信号检测和NB-LDPC代码的这种结合在差速性能方面超过了使用接近最佳的FTN信号探测器与LDPC代码的组合,而且计算复杂性也低得多。