Paper Abstract and Keywords |
Presentation |
2005-05-27 10:10
A Study of Reliability Based Hybrid ARQ Scheme with Bitwise Posterior Probability Evaluation from Message Passing Algorithm Daiki Koizumi, Naoto Kobayashi, Toshiyasu Matsushima, Shigeichi Hirasawa (Waseda Univ.) |
Abstract |
(in Japanese) |
(See Japanese page) |
(in English) |
Reliability Based Hybrid ARQ (RBH-ARQ) is one of hybrid ARQ schemes with the modified decision feedback. In RBH-ARQ, the modified feedback is composed of both ACK/NAK signal and unreliable bit index which is evaluated from bitwise posterior probability.
In the conventional RB-ARQ, the sender retransmits just unreliable information bits with no coding when unreliable bits are detected on the receiver and retransmission occurs. In the proposed RBH-ARQ, on the other hand, the sender retransmits not information bits but newly encoded parity bits corresponding to the unreliable information bits assuming systematic convolutional coding. Furthermore, the proposed scheme assumes message passing algorithm for Maximum A Posteriori probability (MAP) decoding on the receiver. The receiver puts received bits including retransmitted parity bits all together into our proposing probability model. As a result, better performance can be expected in the proposed RBH-ARQ since our probability model is similar to the celebrated decoding model of multiple Turbo codes. Finally, brief simulation results based on several message passing schedules in our algorithm would be shown. |
Keyword |
(in Japanese) |
(See Japanese page) |
(in English) |
Reliability Based Hybrid ARQ / Bitwise MAP Decoding / Message Passing Algorithm / / / / / |
Reference Info. |
IEICE Tech. Rep., vol. 105, no. 85, IT2005-24, pp. 11-16, May 2005. |
Paper # |
IT2005-24 |
Date of Issue |
2005-05-20 (IT) |
ISSN |
Print edition: ISSN 0913-5685 |
Download PDF |
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Conference Information |
Committee |
IT |
Conference Date |
2005-05-25 - 2005-05-27 |
Place (in Japanese) |
(See Japanese page) |
Place (in English) |
Univ. of Hawaii |
Topics (in Japanese) |
(See Japanese page) |
Topics (in English) |
general |
Paper Information |
Registration To |
IT |
Conference Code |
2005-05-IT |
Language |
English |
Title (in Japanese) |
(See Japanese page) |
Sub Title (in Japanese) |
(See Japanese page) |
Title (in English) |
A Study of Reliability Based Hybrid ARQ Scheme with Bitwise Posterior Probability Evaluation from Message Passing Algorithm |
Sub Title (in English) |
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Keyword(1) |
Reliability Based Hybrid ARQ |
Keyword(2) |
Bitwise MAP Decoding |
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Message Passing Algorithm |
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1st Author's Name |
Daiki Koizumi |
1st Author's Affiliation |
Waseda University (Waseda Univ.) |
2nd Author's Name |
Naoto Kobayashi |
2nd Author's Affiliation |
Waseda University (Waseda Univ.) |
3rd Author's Name |
Toshiyasu Matsushima |
3rd Author's Affiliation |
Waseda University (Waseda Univ.) |
4th Author's Name |
Shigeichi Hirasawa |
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Waseda University (Waseda Univ.) |
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Speaker |
Author-1 |
Date Time |
2005-05-27 10:10:00 |
Presentation Time |
20 minutes |
Registration for |
IT |
Paper # |
IT2005-24 |
Volume (vol) |
vol.105 |
Number (no) |
no.85 |
Page |
pp.11-16 |
#Pages |
6 |
Date of Issue |
2005-05-20 (IT) |