Title :
Prediction of hybrid-ARQ based on mutual information model for LDPC coded OFDM system
Author :
Chen, Xiang ; Fei, Zesong ; Kuang, Jingming ; Sun, Wei
Author_Institution :
Dept. of Electron. Eng., Beijing Inst. of Technol., Beijing
Abstract :
An accurate and simple link quality model is of utmost importance in link adaptation (LA) design. Our previous work in has verified the good accuracy of the mutual information (MI) model for rate compatible (RC) LDPC coded OFDM system. In this paper, the MI model is used to predict the retransmission length T of two hybrid ARQ schemes, partial chase combining (PCC) and incremental redundancy (IR). Simulation results verified that the one time retransmission satisfied a certain target BELR with predicted T, i.e. the needed minimum retransmission length. Thus the MI model can serve as an accurate prediction model for high spectrum efficiency hybrid ARQ design of LDPC coded OFDM system.
Keywords :
OFDM modulation; automatic repeat request; parity check codes; BELR; OFDM system; hybrid-ARQ prediction; incremental redundancy; link adaptation; link quality model; mutual information model; partial chase combining; rate compatible LDPC code; Automatic repeat request; Forward error correction; Modulation coding; Mutual information; OFDM; Parity check codes; Predictive models; Table lookup; Throughput; Transmitters; Hybrid ARQ; incremental redundancy; mutual information model; partial chase combining;
Conference_Titel :
Communication Technology, 2008. ICCT 2008. 11th IEEE International Conference on
Conference_Location :
Hangzhou
Print_ISBN :
978-1-4244-2250-0
Electronic_ISBN :
978-1-4244-2251-7
DOI :
10.1109/ICCT.2008.4716208
