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http://dx.doi.org/10.5515/KJKIEES.2011.22.8.768

Partial Retransmission Turbo HARQ Using the Sign Transitions of A Posteriori Values  

Jang, Yeon-Soo (Department of Electronics Computer Engineering, Hanyang University)
Yoon, Dong-Weon (Department of Electronics Computer Engineering, Hanyang University)
Hyun, Kwang-Min (Department of Information & Telecommunication Engineering, Gangneung-Wonju National University)
Lee, Sang-Hyun (Department of Electronics Computer Engineering, Hanyang University)
Publication Information
The Journal of Korean Institute of Electromagnetic Engineering and Science / v.22, no.8, 2011 , pp. 768-775 More about this Journal
Abstract
Since error compensation schemes guaranteeing high reliability are required in wireless communication systems for the transmission of the large amount of data, as an efficient error compensation scheme the turbo HARQ scheme combining automatic repeat request and turbo coding has been studied in many places in the literature. In the case of conventional turbo HARQ schemes, the transmitter recognizing NAK signals repetitively sends the whole unit packet to the receiver although the received packet can be partially correctable. Through two successive processes, selection of uncorrectable error data and retransmission of only the relevant parts of the information data, transmission efficiency can be improved. In this paper, we present an error data selection criterion for retransmission using the sign transitions of A Posteriori values and propose a tubo HARQ scheme based on the partial retransmission technique. Through a computer simulation, we show and analyze the performance of the proposed scheme with transmission efficiency.
Keywords
HARQ; Turbo Code; Partial Retransmission;
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