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Turbo-Coded Adaptive Modulation Versus Space-Time Trellis Codes for Transmission over Dispersive Channels

Turbo-Coded Adaptive Modulation Versus Space-Time Trellis Codes for Transmission over Dispersive Channels
Turbo-Coded Adaptive Modulation Versus Space-Time Trellis Codes for Transmission over Dispersive Channels
Decision feedback equalizer (DFE)-aided turbocoded wideband adaptive quadrature amplitude modulation (AQAM) is proposed, which is capable of combating the temporal channel quality variation of fading channels. A procedure is suggested for determining the AQAM switching thresholds and the specific turbo-coding rates capable of maintaining the target bit-error rate while aiming for achieving a highly effective bits per symbol throughput. As a design alternative, we also employ multiple-input/multiple-output DFE-aided space–time trellis codes, which benefit from transmit diversity and hence reduce the temporal channel quality fluctuations. The performance of both systems is characterized and compared when communicating over the COST 207 typical urban wideband fading channel. It was found that the turbo-coded AQAM scheme outperforms the two-transmitter space–time trellis coded system employing two receivers; although, its performance is inferior to the space–time trellis coded arrangement employing three receivers. Index Terms—Coded adaptive modulation, dispersive channels, space–time trellis codes.
2019-2029
Liew, T.H.
a431a389-23f9-4360-9c85-8f4265770636
Wong, C.H.
a69b576c-83a9-478a-b3dd-abac7bbbe7a6
Hanzo, L.
66e7266f-3066-4fc0-8391-e000acce71a1
Liew, T.H.
a431a389-23f9-4360-9c85-8f4265770636
Wong, C.H.
a69b576c-83a9-478a-b3dd-abac7bbbe7a6
Hanzo, L.
66e7266f-3066-4fc0-8391-e000acce71a1

Liew, T.H., Wong, C.H. and Hanzo, L. (2004) Turbo-Coded Adaptive Modulation Versus Space-Time Trellis Codes for Transmission over Dispersive Channels. IEEE Transactions on Wireless Communications, 3 (6), 2019-2029.

Record type: Article

Abstract

Decision feedback equalizer (DFE)-aided turbocoded wideband adaptive quadrature amplitude modulation (AQAM) is proposed, which is capable of combating the temporal channel quality variation of fading channels. A procedure is suggested for determining the AQAM switching thresholds and the specific turbo-coding rates capable of maintaining the target bit-error rate while aiming for achieving a highly effective bits per symbol throughput. As a design alternative, we also employ multiple-input/multiple-output DFE-aided space–time trellis codes, which benefit from transmit diversity and hence reduce the temporal channel quality fluctuations. The performance of both systems is characterized and compared when communicating over the COST 207 typical urban wideband fading channel. It was found that the turbo-coded AQAM scheme outperforms the two-transmitter space–time trellis coded system employing two receivers; although, its performance is inferior to the space–time trellis coded arrangement employing three receivers. Index Terms—Coded adaptive modulation, dispersive channels, space–time trellis codes.

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Published date: November 2004
Organisations: Southampton Wireless Group

Identifiers

Local EPrints ID: 260291
URI: https://eprints.soton.ac.uk/id/eprint/260291
PURE UUID: 6f58e12b-2815-4b03-bb0b-32d1821817d1
ORCID for L. Hanzo: ORCID iD orcid.org/0000-0002-2636-5214

Catalogue record

Date deposited: 19 Jan 2005
Last modified: 20 Jul 2019 01:26

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Contributors

Author: T.H. Liew
Author: C.H. Wong
Author: L. Hanzo ORCID iD

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