Reliability-Based Hybrid ARQ Scheme with Encoded Parity Bit Retransmissions and Message Passing Decoding

• KOIZUMI Daiki

  Graduate School of Science and Engineering, Waseda University

• KOBAYASHI Naoto

  Media Network Center, Waseda University

• MATSUSHIMA Toshiyasu

  Department of Applied Mathematics, School of Fundamental Science and Engineering, Waseda University

• HIRASAWA Shigeichi

  Department of Industrial and Management Systems Engineering, School of Creative Science and Engineering, Waseda University

抄録

Reliability-based hybrid ARQ (RB-HARQ) is a kind of incremental-redundancy ARQ recently introduced. In the RB-HARQ, the receiver returns both NAK signal and set of unreliable bit indices if the received sequence is not accepted. Since each unreliable bit index is determined by the bitwise posterior probability, better approximation of that probability becomes crucial as the number of retransmissions increases. Assuming the systematic code for the initial transmission, the proposed RB-HARQ scheme has the following two features: (a) the sender retransmits newly encoded and interleaved parity bits corresponding to the unreliable information bits; (b) the retransmitted parity bits as well as the initial received sequence are put all together to perform the message passing decoding i.e. the suboptimal MAP decoding. Finally, simulation results are shown to evaluate the above two features.

収録刊行物

• IEICE transactions on fundamentals of electronics, communications and computer sciences

  IEICE transactions on fundamentals of electronics, communications and computer sciences 90 (9), 1736-1744, 2007-09-01

  一般社団法人電子情報通信学会

キーワード

• reliability-based hybrid ARQ
• bitwise MAP decoding
• message passing algorithm

詳細情報

• CRID: 1573668927358876928
• NII論文ID: 110007538084
• NII書誌ID: AA10826239
• ISSN: 09168508
• 本文言語コード: en
• データソース種別:
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