A New Criterion for Retransmission in Type I H-ARQ Schemes of LDPC Coded OFDM Systems

In this paper, a new criterion for reordering of low-density parity-check (LDPC) coded orthogonal frequency division multiplexing (OFDM) subframes is proposed for type I hybrid automatic repeat request (H-ARQ) systems. It is verified from numerical analysis that a subframe reordering pattern having...

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Hauptverfasser:	Min-Ho Jang, Beomkyu Shin, Jong-Seon No, Sang-Hyo Kim, Dong-Joon Shin
Format:	Tagungsbericht
Sprache:	eng
Schlagworte:	Automatic repeat request Bit error rate Channel capacity Decoding Digital video broadcasting Fading OFDM Parity check codes Wireless communication Wireless LAN
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creator	Min-Ho Jang Beomkyu Shin Jong-Seon No Sang-Hyo Kim Dong-Joon Shin
description	In this paper, a new criterion for reordering of low-density parity-check (LDPC) coded orthogonal frequency division multiplexing (OFDM) subframes is proposed for type I hybrid automatic repeat request (H-ARQ) systems. It is verified from numerical analysis that a subframe reordering pattern having larger channel capacity shows better bit error rate (BER). Also, it is shown that the subframe reordering pattern achieving equal combined power allocation for each subframe maximizes the channel capacity and outperforms other subframe reordering patterns in terms of BER performance. Simulation results are provided to confirm that for a very slow varying fading channel, the proposed subframe reordering scheme for achieving equal combined power allocation gives better BER performance than the conventional Chase combining scheme without increasing the decoding complexity.
doi_str_mv	10.1109/VETECF.2009.5378749
format	Conference Proceeding
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source	IEEE Electronic Library (IEL) Conference Proceedings
subjects	Automatic repeat request Bit error rate Channel capacity Decoding Digital video broadcasting Fading OFDM Parity check codes Wireless communication Wireless LAN
title	A New Criterion for Retransmission in Type I H-ARQ Schemes of LDPC Coded OFDM Systems
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