Title :
Influence of Degree Distribution of Irregular LDPC Codes on HARQ Performance
Author :
Xu, Chengxin ; Chang, Yongyu ; Yang, Dacheng
Author_Institution :
Wireless Theor. & Technol. Lab., Beijing Univ. of Posts & Telecommun., Beijing
Abstract :
In this paper, a progressive hybrid automatic repeat request (HARQ) scheme on degree distribution for irregular low-density parity-check (LDPC) codes is proposed. In this scheme, lower degree nodes are retransmitted. During the process of choosing nodes for retransmission, not only degree distribution but also unequal error protection (UEP) property and iterative decoding process of irregular LDPC codes are considered. Compared with initial Degree Distribution Based HARQ (DDB-HARQ), the proposed scheme has better performance.
Keywords :
automatic repeat request; error correction codes; iterative decoding; parity check codes; HARQ scheme; hybrid automatic repeat request; initial degree distribution; irregular LDPC codes; iterative decoding process; low-density parity-check codes; unequal error protection property; AWGN; Automatic repeat request; Error correction codes; Iterative decoding; Parity check codes; Performance analysis; Pollution; Redundancy; Sum product algorithm; Turbo codes;
Conference_Titel :
Vehicular Technology Conference, 2008. VTC Spring 2008. IEEE
Conference_Location :
Singapore
Print_ISBN :
978-1-4244-1644-8
Electronic_ISBN :
1550-2252
DOI :
10.1109/VETECS.2008.166
