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ThinkMind // International Journal On Advances in Telecommunications, volume 8, numbers 1 and 2, 2015 // View article tele_v8_n12_2015_7


On Type II Hybrid-ARQ with Decode and Forward Relay using Non-Binary Rate-Compatible Punctured LDPC Code on MIMO Frequency Selective Channels

Authors:
Sho Kato
Yasunori Iwanami

Keywords: NB RCP LDPC code; Hybrid-ARQ; Decode and Forward Relay; MIMO; OFDM; SC-FDMA; Symbol-LLR

Abstract:
In this paper, Non-Binary Rate-Compatible Punctured Low Density Parity Check (NB RCP LDPC) code is designed over the extended Galois Field. The designed NB RCP LDPC code is applied to the type II Hybrid Automatic Repeat reQuest (HARQ) with Decode and Forward (DF) relay on Multiple Input Multiple Output (MIMO) Orthogonal Frequency Division Multiplexing (OFDM) channel and MIMO Single Carrier-Frequency Division Multiple Access (SC-FDMA) channel. The designed code enables us to decrease the coding rate with incremental redundancy for each retransmission in HARQ. The retransmission is done from the DF relay after the successful decoding in the relay. We have verified through computer simulations that the proposed type II HARQ scheme with DF relay greatly improves the throughput and average retransmission characteristics compared with the scheme without DF relay. Multiple relay cases are also considered.

Pages: 74 to 83

Copyright: Copyright (c) to authors, 2015. Used with permission.

Publication date: June 30, 2015

Published in: journal

ISSN: 1942-2601

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