DocumentCode :
2233263
Title :
Pseudo-ARQ for a Low Density Parity Check Code Decoder
Author :
Alleyne, Damien ; Sodha, Janak
Author_Institution :
Univ. of the West Indies, Bridgetown
fYear :
2007
fDate :
8-10 Oct. 2007
Firstpage :
19
Lastpage :
19
Abstract :
A pseudo automatic repeat request scheme for a LDPC decoder is presented which dramatically improves the probability of an error in an information binary digit over the signal-to-noise ratio (SNR) range 0 dB to 2 dB, by sacrificing the information throughput, with the added advantage of not being adversely affected by a fluctuation in the channel SNR. A frame, which consists of the concatenation of several code words, is retransmitted only if the channel signal- to-noise ratio estimate is found to be lower than a set threshold. Overall, the throughput is only briefly reduced as required to ensure excellent performance over low and high SNRs. Simulation results are presented for rate 1/2 (288, 576) WiMAX 802.16e LDPC code over an A WON channel with binary phase shift keying (BPSK) modulation.
Keywords :
AWGN channels; WiMax; automatic repeat request; decoding; error statistics; parity check codes; phase shift keying; AWGN channel; BPSK; LDPC decoder; SNR; WiMAX 802.16e; binary phase shift keying modulation; channel signal- to-noise ratio estimate; error probability; low density parity check code decoder; pseudo-ARQ; Automatic repeat request; Binary phase shift keying; Decoding; Fluctuations; Modulation coding; Parity check codes; Phase modulation; Signal to noise ratio; Throughput; WiMAX;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Wireless and Mobile Computing, Networking and Communications, 2007. WiMOB 2007. Third IEEE International Conference on
Conference_Location :
White Plains, NY
Print_ISBN :
978-0-7695-2889-2
Type :
conf
DOI :
10.1109/WIMOB.2007.4390813
Filename :
4390813
Link To Document :
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