A new approach to UEP-HARQ via convolutional codes

Annabel Sharon Shetrit, Yonathan Murin, Ron Dabora, Osnat Keren

Research output: Contribution to journalArticlepeer-review

2 Scopus citations


This letter presents a novel type-II hybrid automatic repeat request (HARQ) transmission scheme which is based on pruned convolutional codes (CCs) and supports unequal error protection (UEP). The data to be transmitted is assumed to consist of important bits (IB) and standard bits (SB). In the proposed scheme, all the bits are first encoded using a single mother CC and transmitted over the channel. If a decoding error is detected in the IB, then retransmission of only the IB takes place using a CC, typically with a better error correction capability. Next, taking advantage of the properties of pruned CCs, the decoded IB are used to increase the decoding reliability for the SB. Numerical simulations indicate that the proposed scheme offers strong protection for the IB along with improved reliability for the remaining bits compared to other UEP schemes.

Original languageEnglish
Article number7270257
Pages (from-to)2062-2065
Number of pages4
JournalIEEE Communications Letters
Issue number12
StatePublished - 1 Dec 2015

Bibliographical note

Publisher Copyright:
© 2015 IEEE.


  • Convolutional code
  • HARQ
  • UEP


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