HARQ Aided Systematic LT Coding for Amplify-Forward and Decode-Forward Cooperation
HARQ Aided Systematic LT Coding for Amplify-Forward and Decode-Forward Cooperation
Systematic Luby Transform (SLT) codes constitute rateless codes, which are capable of adaptively adjusting their code rate depending on the channel quality without explicit channel state information (CSI) at the transmitters. SLTs are also suitable for space-time collaboration aided relay networks. In this paper, an iterative decoding aided SLT scheme is combined with 16-QAM transmission in a wireless relay aided network. The Bit Error Ratio (BER) results and Extrinsic Information Transfer (EXIT) charts are provided to evaluate the performance of the proposed scheme. The simulation results show that the proposed scheme using amplify-and-forward (AF) relaying achieves a 2.5dB gain at a BER of 10?5 , while the attainable improvement is nearly 6dB for decode-and-forward (DF) relaying, compared to the non-cooperative scheme, where the 16-QAM and the SLT decoder work independently. Moreover, the AF relaying aided SLT coded 16-QAM scheme is more beneficial, when the relay station is close to the source. By contrast, the DF relaying performs best near the mid-point between the source and destination. In addition, a modified Hybrid Automatic-Repeat-reQuest (HARQ) protocol using incremental redundancy is applied along with the SLT coded 16-QAM scheme to enhance the achievable throughput and energy efficiency of cooperative networks. This arrangement reduces the total transmit power by about 8%, compared to the classic HARQ scheme.
978-1-4244-3573-9
Ngo, Hoang Anh
c7839dbb-8b72-4376-9f70-0ab7dd5ce400
Nguyen Dang, Thanh
e5332732-dc8c-4238-b60e-b6ce948bfb10
Hanzo, Lajos
66e7266f-3066-4fc0-8391-e000acce71a1
September 2010
Ngo, Hoang Anh
c7839dbb-8b72-4376-9f70-0ab7dd5ce400
Nguyen Dang, Thanh
e5332732-dc8c-4238-b60e-b6ce948bfb10
Hanzo, Lajos
66e7266f-3066-4fc0-8391-e000acce71a1
Ngo, Hoang Anh, Nguyen Dang, Thanh and Hanzo, Lajos
(2010)
HARQ Aided Systematic LT Coding for Amplify-Forward and Decode-Forward Cooperation.
VTC2010-FALL Ottawa, Canada, Ottawa, Canada.
06 - 09 Sep 2010.
Record type:
Conference or Workshop Item
(Paper)
Abstract
Systematic Luby Transform (SLT) codes constitute rateless codes, which are capable of adaptively adjusting their code rate depending on the channel quality without explicit channel state information (CSI) at the transmitters. SLTs are also suitable for space-time collaboration aided relay networks. In this paper, an iterative decoding aided SLT scheme is combined with 16-QAM transmission in a wireless relay aided network. The Bit Error Ratio (BER) results and Extrinsic Information Transfer (EXIT) charts are provided to evaluate the performance of the proposed scheme. The simulation results show that the proposed scheme using amplify-and-forward (AF) relaying achieves a 2.5dB gain at a BER of 10?5 , while the attainable improvement is nearly 6dB for decode-and-forward (DF) relaying, compared to the non-cooperative scheme, where the 16-QAM and the SLT decoder work independently. Moreover, the AF relaying aided SLT coded 16-QAM scheme is more beneficial, when the relay station is close to the source. By contrast, the DF relaying performs best near the mid-point between the source and destination. In addition, a modified Hybrid Automatic-Repeat-reQuest (HARQ) protocol using incremental redundancy is applied along with the SLT coded 16-QAM scheme to enhance the achievable throughput and energy efficiency of cooperative networks. This arrangement reduces the total transmit power by about 8%, compared to the classic HARQ scheme.
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Published date: September 2010
Additional Information:
Event Dates: 6-9 September 2010
Venue - Dates:
VTC2010-FALL Ottawa, Canada, Ottawa, Canada, 2010-09-06 - 2010-09-09
Organisations:
Southampton Wireless Group
Identifiers
Local EPrints ID: 271538
URI: http://eprints.soton.ac.uk/id/eprint/271538
ISBN: 978-1-4244-3573-9
PURE UUID: 8792d04d-ff19-432c-b055-d26dd533495a
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Date deposited: 12 Sep 2010 17:17
Last modified: 18 Mar 2024 02:34
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Contributors
Author:
Hoang Anh Ngo
Author:
Thanh Nguyen Dang
Author:
Lajos Hanzo
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