Reliability-based hybrid ARQ and rate-compatible punctured convolutional (RCPC) codes

Reliability-based hybrid ARQ (RB-HARQ) is a recently developed form of incremental-redundancy ARQ. The RB-HARQ technique can be used with codes that use soft-input, soft-output (SISO) decoders, such as convolutional codes and turbo codes. In RB-HARQ, the bits that are to be retransmitted are adaptiv...

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Bibliographic Details
Published in:2004 IEEE Wireless Communications and Networking Conference Vol. 4; pp. 2105 - 2109 Vol.4
Main Authors: Roongta, A., Shea, J.M.
Format: Conference Proceeding
Language:English
Published: Piscataway NJ IEEE 2004
Subjects:
Applied sciences
Automatic repeat request
Coding, codes
Computer network reliability
Convolutional codes
Decoding
Exact sciences and technology
Feedback
Information, signal and communications theory
Signal and communications theory
Source coding
Systems, networks and services of telecommunications
Telecommunications
Telecommunications and information theory
Throughput
Transmission and modulation (techniques and equipments)
Turbo codes
Performance evaluation
Source coding
Convolutional code
Redundancy
Bit error rate
Information rate
Hybrid model
Turbo code
Channel coding
Automatic repeat request
Hybrid mode
Information transmission
ISBN:9780780383449, 0780383443
ISSN:1525-3511
Online Access:Get full text
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Summary:Reliability-based hybrid ARQ (RB-HARQ) is a recently developed form of incremental-redundancy ARQ. The RB-HARQ technique can be used with codes that use soft-input, soft-output (SISO) decoders, such as convolutional codes and turbo codes. In RB-HARQ, the bits that are to be retransmitted are adaptively selected at the receiver based on the estimated bit reliabilities at the output of a SISO decoder. This technique has the potential to improve performance and minimize retransmission size by targeting those bits that are likely to be in error. It has already been shown that RB-HARQ achieves significant performance improvement provided that large retransmission-request (NACK) packets can be afforded on the feedback link. In this paper, we propose and evaluate the performance of a RB-HARQ technique that uses rate-compatible punctured convolutional (RCPC) codes in the forward channel and source coding in the feedback link. The proposed technique uses source coding to achieve small request packets, thus leading to better performance. The performance of the proposed technique is evaluated in terms of probability of bit error, probability of packet error and throughput. We also compare the performance of the proposed scheme with the common approach to hybrid-ARQ that uses punctured convolutional codes and code combining. The results show that the proposed RB-HARQ scheme achieves better performance than a hybrid-ARQ scheme that uses only RCPC codes.
ISBN:9780780383449
0780383443
ISSN:1525-3511
DOI:10.1109/WCNC.2004.1311412