Hybrid ARQ with rate adaptation in multiband OFDM UWB systems

Authors:
Cheng-Xiang Wang;Heung-Gyoon Ryu;Hsiao-Hwa Chen;Yejun He
Affiliations:
Joint Research Institute for Signal and Image Processing, Heriot-Watt University, Edinburgh, UK;Department of Electronic Engineering, Chungbuk National University, Chungbuk, Korea;Department of Engineering Science, National Cheng Kung University, Taiwan;College of Information Engineering, Shenzhen University, Shenzhen, China
Venue:
ICC'09 Proceedings of the 2009 IEEE international conference on Communications
Year:
2009

Citing 2
Cited 0

Hybrid Automatic Repeat Requests for MB-OFDM Ultra-Wideband

ICWMC '07 Proceedings of the Third International Conference on Wireless and Mobile Communications
Cross-Layer combining of adaptive Modulation and coding with truncated ARQ over wireless links

IEEE Transactions on Wireless Communications

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Abstract

In this paper, we propose a cross-layer design (CLD) scheme combining rate adaptation and four types of hybrid automatic repeat request (HARQ) for multiband orthogonal frequency division multiplexing (MB-OFDM) ultra wideband (UWB) systems following the ECMA-368 standard. The time varying property is incorporated into standard UWB channel models for the purpose of investigating rate adaptation. To accurately accommodate fast time-varying channel conditions, we propose to embed the selected rate information into the acknowledgement (ACK) frames. It is shown that the proposed CLD scheme combining rate adaptation and HARQ can provide higher throughput than the HARQ-only schemes. Among the four types of HARQ schemes, HARQ Type-III has the best throughput performance while Type I has the worst.