Performance analysis of RB-HARQ with LDPC

Author

Cao, Yiqing ; Wang, Yafeng ; Yang, Hongwen

Author_Institution

Wireless Commun. Res. Center, Beijing Univ. of Posts & Telecommun., China

Volume

1

fYear

2005

fDate

23-26 Sept. 2005

Firstpage

411

Lastpage

414

Abstract

In this paper, we combined reliability-based hybrid automatic repeat request (RB-HARQ) with low density parity check (LDPC) codes together and studied its performance. We analyzed the asymptotic performance of LDPC coded HARQ with Gaussian approximation (GA), and investigated the most important factor to the improvement of performance. According to our research, the degrees of the variable nodes play an important role in the system performance. Since RB-HARQ selects bits with least reliabilities to retransmit, we found the selecting method of RB-HARQ is not optimal for LDPC coded HARQ system.

Keywords

Gaussian processes; automatic repeat request; parity check codes; telecommunication network reliability; Gaussian approximation; LDPC codes; RB-HARQ; low density parity check; reliability-based hybrid automatic repeat request; AWGN; Automatic repeat request; Decoding; Fading; Feedback; Laboratories; Parity check codes; Performance analysis; System performance; Wireless communication;

fLanguage

English

Publisher

ieee

Conference_Titel

Wireless Communications, Networking and Mobile Computing, 2005. Proceedings. 2005 International Conference on

Print_ISBN

0-7803-9335-X

Type

conf

DOI

10.1109/WCNM.2005.1544069

Filename

1544069