Low-Complexity Hybrid ARQ Scheme for Polar Codes with Higher-Order Modulation

Combining the polar coded hybrid automatic repeat request (HARQ) with higher-order modulation has been proposed recently. To further improve the throughput of HARQ, a novel polar coded HARQ cheme with higher-order modulation is proposed. Wherein the proposed HARQ scheme, the unequal rror protection...

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Bibliographic Details
Published inGLOBECOM 2017 - 2017 IEEE Global Communications Conference pp. 1 - 6
Main Authors Kuangda Tian, Rongke Liu, Vardy, Alexander, Runxin Wang
Format Conference Proceeding
LanguageEnglish
Published IEEE 01.12.2017
Subjects
AWGN channels
Complexity theory
Decoding
Error probability
Modulation
Receivers
Throughput
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Summary:Combining the polar coded hybrid automatic repeat request (HARQ) with higher-order modulation has been proposed recently. To further improve the throughput of HARQ, a novel polar coded HARQ cheme with higher-order modulation is proposed. Wherein the proposed HARQ scheme, the unequal rror protection (UEP), caused by bit-mapping, in bit- interleaved polar coded modulation (BIPCM) is considered. Based on UEP, a non-linear integer programming (NLIP) problem is constructed to determine the optimal retransmitted sequence. Furthermore, a low-complexity suboptimal algorithm is proposed to solve the resulting NLIP problem. Simulation results show that the throughput of the proposed HARQ scheme outperforms the existing polar coded HARQ for higher-order modulation; in particular, our scheme easily accommodates arbitrarily puncturing methods. This makes it possible to use recently proposed puncturing methods for polar codes to further improve the performance of our HARQ scheme.
DOI:10.1109/GLOCOM.2017.8254939