Coded Faster-than-Nyquist Signaling for Short Packet Communications

TL;DR

This paper explores using faster-than-Nyquist signaling combined with low-density parity-check codes to improve short packet communication performance in low-latency, ultra-reliable systems, achieving better error rates with lower complexity.

Contribution

It introduces a low-complexity FTN signaling detection method combined with NB-LDPC codes tailored for URLLC, outperforming existing near-optimal detectors in error rate and computational efficiency.

Findings

Outperforms close-to-optimal FTN detectors in error rate.

Reduces computational complexity significantly.

Enhances performance for short packet URLLC communications.

Abstract

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.