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
1281-1290
Xiang, Luping
ee0a15fb-5774-4004-b236-e301d323d786
Maunder, Robert
76099323-7d58-4732-a98f-22a662ccba6c
Hanzo, Lajos
66e7266f-3066-4fc0-8391-e000acce71a1
February 2020
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), , [8939423].
(doi:10.1109/TVT.2019.2961746).
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
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
Catalogue record
Date deposited: 13 Jan 2020 17:34
Last modified: 27 Oct 2020 20:00
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Contributors
Author:
Luping Xiang
Author:
Robert Maunder
Author:
Lajos Hanzo
University divisions
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