The University of Southampton
University of Southampton Institutional Repository

Concurrent OFDM demodulation and turbo decoding for ultra reliable low latency communication

Concurrent OFDM demodulation and turbo decoding for ultra reliable low latency communication
Concurrent OFDM demodulation and turbo decoding for ultra reliable low latency communication
TThe Ultra-Reliable Low Latency Communication~(URLLC) applications have been proposed in recent years, targeting a round-trip end-to-end latency less than 1 ms with high reliability. Therefore, an order of magnitude improvements are needed in all layers of the wireless communication stack. This is a particular challenge for the physical layer, where typically a processing time of the order of microseconds is required for the computationally intensive demodulation and error correction processing, among other operations. Conventionally, the reception of signals, the demodulation processing and the error correction processing are performed consecutively at the receiver. However, this approach is associated with processing times on the order of hundreds of microseconds, preventing URLLC. Therefore, this paper proposes a novel processing architecture, which is capable of performing reception, \ac{OFDM} demodulation and turbo decoding concurrently, rather than consecutively, hence significantly reducing the processing time. In order to achieve concurrent operation, the \ac{OFDM} demodulation is performed using a novel cumulative \ac{FFT}, which produces successively more reliable estimates of all transmitted symbols in each successive clock cycle. At the same time, a \ac{FPTD} is used to recover successively more reliable estimates of all bits in each successive clock cycle.
Fast Fourier Transform (FFT), Fully-Parallel Turbo Decoder (FPTD), Orthogonal Frequency Division Multiplexing (OFDM), latency
0018-9545
1281-1290
Xiang, Luping
ee0a15fb-5774-4004-b236-e301d323d786
Maunder, Robert
76099323-7d58-4732-a98f-22a662ccba6c
Hanzo, Lajos
66e7266f-3066-4fc0-8391-e000acce71a1
Xiang, Luping
ee0a15fb-5774-4004-b236-e301d323d786
Maunder, Robert
76099323-7d58-4732-a98f-22a662ccba6c
Hanzo, Lajos
66e7266f-3066-4fc0-8391-e000acce71a1

Xiang, Luping, Maunder, Robert and Hanzo, Lajos (2020) Concurrent OFDM demodulation and turbo decoding for ultra reliable low latency communication. IEEE Transactions on Vehicular Technology, 69 (2), 1281-1290, [8939423]. (doi:10.1109/TVT.2019.2961746).

Record type: Article

Abstract

TThe Ultra-Reliable Low Latency Communication~(URLLC) applications have been proposed in recent years, targeting a round-trip end-to-end latency less than 1 ms with high reliability. Therefore, an order of magnitude improvements are needed in all layers of the wireless communication stack. This is a particular challenge for the physical layer, where typically a processing time of the order of microseconds is required for the computationally intensive demodulation and error correction processing, among other operations. Conventionally, the reception of signals, the demodulation processing and the error correction processing are performed consecutively at the receiver. However, this approach is associated with processing times on the order of hundreds of microseconds, preventing URLLC. Therefore, this paper proposes a novel processing architecture, which is capable of performing reception, \ac{OFDM} demodulation and turbo decoding concurrently, rather than consecutively, hence significantly reducing the processing time. In order to achieve concurrent operation, the \ac{OFDM} demodulation is performed using a novel cumulative \ac{FFT}, which produces successively more reliable estimates of all transmitted symbols in each successive clock cycle. At the same time, a \ac{FPTD} is used to recover successively more reliable estimates of all bits in each successive clock cycle.

Text
ofdm-fptd-double-1221 - Accepted Manuscript
Download (861kB)

More information

Accepted/In Press date: December 2019
e-pub ahead of print date: 23 December 2019
Published date: February 2020
Keywords: Fast Fourier Transform (FFT), Fully-Parallel Turbo Decoder (FPTD), Orthogonal Frequency Division Multiplexing (OFDM), latency

Identifiers

Local EPrints ID: 436902
URI: http://eprints.soton.ac.uk/id/eprint/436902
ISSN: 0018-9545
PURE UUID: 60b7602d-0f47-4758-a145-ce27f78ddf89
ORCID for Luping Xiang: ORCID iD orcid.org/0000-0003-1465-6708
ORCID for Robert Maunder: ORCID iD orcid.org/0000-0002-7944-2615
ORCID for Lajos Hanzo: ORCID iD orcid.org/0000-0002-2636-5214

Catalogue record

Date deposited: 13 Jan 2020 17:34
Last modified: 27 Oct 2020 20:00

Export record

Altmetrics

Contributors

Author: Luping Xiang ORCID iD
Author: Robert Maunder ORCID iD
Author: Lajos Hanzo ORCID iD

University divisions

Download statistics

Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.

View more statistics

Atom RSS 1.0 RSS 2.0

Contact ePrints Soton: eprints@soton.ac.uk

ePrints Soton supports OAI 2.0 with a base URL of http://eprints.soton.ac.uk/cgi/oai2

This repository has been built using EPrints software, developed at the University of Southampton, but available to everyone to use.

We use cookies to ensure that we give you the best experience on our website. If you continue without changing your settings, we will assume that you are happy to receive cookies on the University of Southampton website.

×