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Multiple-Symbol Differential Sphere Detection for the Amplify-and-Forward Cooperative Uplink

Multiple-Symbol Differential Sphere Detection for the Amplify-and-Forward Cooperative Uplink
Multiple-Symbol Differential Sphere Detection for the Amplify-and-Forward Cooperative Uplink
It is widely recognized that the differential amplify-and-forward (DAF) transmission scheme is capable of providing a superior performance compared to classic direct transmissions employing differential detection in slow-fading channels and in fact it may even outperform coherent detection aided systems relying on realistic imperfect channel estimates. However, in reality the channels connecting the multiple nodes of a cooperative system typically become time-selective due to the relative mobility of the cooperating terminals. Hence, the performance gain achieved may erode as the environment becomes more time-selective. On the other hand, multiple-symbol based differential sphere detection (MSDSD) has been proposed to mitigate the channel-induced performance loss suffered by classic direct transmission schemes employing the conventional differential detection (CDD) scheme. Hence in this paper, we specifically design the MSDSD based on a multi-dimensional tree search, which is capable of achieving a significant performance gain in the context of a DAF-aided cooperative system for transmission over time-selective channels. For example, given a target BER of 10-3, a performance gain of about 10 dB can be attained by the proposed MSDSD for a two-user cooperative system in a channel having a normalized Doppler frequency of 0.03.
Wang, Li
f54669eb-8e6b-43ea-a6df-47cda21d6950
Hanzo, Lajos
66e7266f-3066-4fc0-8391-e000acce71a1
Wang, Li
f54669eb-8e6b-43ea-a6df-47cda21d6950
Hanzo, Lajos
66e7266f-3066-4fc0-8391-e000acce71a1

Wang, Li and Hanzo, Lajos (2009) Multiple-Symbol Differential Sphere Detection for the Amplify-and-Forward Cooperative Uplink. IEEE VTC'2009 Fall, Sept. 20-23, 2009, Anchorage, Alaska, USA.

Record type: Conference or Workshop Item (Paper)

Abstract

It is widely recognized that the differential amplify-and-forward (DAF) transmission scheme is capable of providing a superior performance compared to classic direct transmissions employing differential detection in slow-fading channels and in fact it may even outperform coherent detection aided systems relying on realistic imperfect channel estimates. However, in reality the channels connecting the multiple nodes of a cooperative system typically become time-selective due to the relative mobility of the cooperating terminals. Hence, the performance gain achieved may erode as the environment becomes more time-selective. On the other hand, multiple-symbol based differential sphere detection (MSDSD) has been proposed to mitigate the channel-induced performance loss suffered by classic direct transmission schemes employing the conventional differential detection (CDD) scheme. Hence in this paper, we specifically design the MSDSD based on a multi-dimensional tree search, which is capable of achieving a significant performance gain in the context of a DAF-aided cooperative system for transmission over time-selective channels. For example, given a target BER of 10-3, a performance gain of about 10 dB can be attained by the proposed MSDSD for a two-user cooperative system in a channel having a normalized Doppler frequency of 0.03.

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More information

Published date: 20 September 2009
Venue - Dates: IEEE VTC'2009 Fall, Sept. 20-23, 2009, Anchorage, Alaska, USA, 2009-09-20
Organisations: Southampton Wireless Group

Identifiers

Local EPrints ID: 267258
URI: https://eprints.soton.ac.uk/id/eprint/267258
PURE UUID: 8617f38d-0b2a-4cfb-ae5b-0ec8130eaee6
ORCID for Lajos Hanzo: ORCID iD orcid.org/0000-0002-2636-5214

Catalogue record

Date deposited: 05 Apr 2009 11:58
Last modified: 31 Jul 2018 00:36

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Contributors

Author: Li Wang
Author: Lajos Hanzo ORCID iD

University divisions

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