The University of Southampton
University of Southampton Institutional Repository

Near-Capacity Turbo Coded Soft-decision Aided DAPSK/Star-QAM for Amplify-and-Forward based Cooperative Communications

Liang, Dandan, Ng, Soon Xin and Hanzo, Lajos (2013) Near-Capacity Turbo Coded Soft-decision Aided DAPSK/Star-QAM for Amplify-and-Forward based Cooperative Communications IEEE Transactions on Communications

Record type: Article

Abstract

Abstract—Multilevel Differential Amplitude and Phase-Shift
Keying (DAPSK) schemes do not require any channel estimation, which results in low complexity. In this treatise we derive the soft-output probability formulas required for a soft-decision based demodulation of high-order DAPSK, in order to facilitate iterative detection by exchanging extrinsic information with an outer Turbo Code (TC). Furthermore, when the TC block size is increased, the system operates closer to the channel capacity. Compared to the identical-throughput TC assisted 64-ary Differential Phase-Shift Keying (64-DPSK) scheme, the 4-ring based TC assisted 64-ary DAPSK arrangement has a power-efficiency improvement of 2.3 dB at a bit error rate (BER) of 10?5 . Furthermore, when the TC block size is increased, the system operates closer to the channel capacity. More specifically, when using a TC block length of 400 modulated symbols, the 64 DAPSK (4, 16) scheme is 7.56 dB away from its capacity curve, while it had a reduced gap as low as 2.25 dB, when using a longer TC block length of 40 000 modulated symbols. Finally, as a novel application example, the soft-decision M-DAPSK scheme was incorporated into an Amplify-and-Forward (AF) based cooperative communication system, which attains another
4.5 dB SNR improvement for a TC block length of 40 000
modulated symbols.

PDF TCOM-11-0786.pdf - Other
Download (236kB)

More information

Published date: 2013
Organisations: Southampton Wireless Group

Identifiers

Local EPrints ID: 346071
URI: http://eprints.soton.ac.uk/id/eprint/346071
PURE UUID: 54f80e32-1f19-454a-a51e-51c9ae7f2265

Catalogue record

Date deposited: 10 Dec 2012 15:36
Last modified: 18 Jul 2017 05:06

Export record

Contributors

Author: Dandan Liang
Author: Soon Xin Ng
Author: Lajos Hanzo

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.

×