Analysis of conditional error rate and combining schemes in HARQ

Long, Hang, Xiang, Wei, Shen, Shanshan, Zhang, Yueying, Zheng, Kan, and Wang, Wenbo (2012) Analysis of conditional error rate and combining schemes in HARQ. IEEE Transactions on Signal Processing, 60 (5). pp. 2677-2682.

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Abstract

In hybrid automatic repeat request (HARQ), maximum ratio combining (MRC) is usually employed at the receiver if the retransmission signal is the same as that in the first transmission. However, conventional performance analysis of HARQ and MRC does not consider that all previous transmissions fail. In this paper, we analyze the conditional error rate of HARQ with arbitrary combining schemes. Both the theoretical and approximate expressions of the conditional error rate are derived. Our analytical and simulation results reveal that conventional MRC is not optimum for HARQ, especially when the packet is short or the channel gain of the first transmission is much better than that of retransmission.

Item ID: 43327
Item Type: Article (Research - C1)
ISSN: 1941-0476
Keywords: Conditional error rate, hybrid automatic repeat request (HARQ), maximum ratio combining (MRC)
Funders: National Science Foundation for Postdoctoral Scientists of China (NSF), National Basic Research Program of China (NBRPC), Research Fund for the Doctoral Program of Higher Education (RFDPHE)
Projects and Grants: NSF grant no. 20110490329, NBRPC grant no. 2012CB316005, RFDPHE grant no. 20090005120002
Date Deposited: 24 Feb 2016 07:47
FoR Codes: 09 ENGINEERING > 0906 Electrical and Electronic Engineering > 090699 Electrical and Electronic Engineering not elsewhere classified @ 100%
SEO Codes: 89 INFORMATION AND COMMUNICATION SERVICES > 8901 Communication Networks and Services > 890199 Communication Networks and Services not elsewhere classified @ 100%
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