Title :
Protograph-Based Raptor-Like LDPC Codes for Rate Compatibility with Short Blocklengths
Author :
Chen, Tsung-Yi ; Divsalar, Dariush ; Wang, Jiadong ; Wesel, Richard D.
Author_Institution :
Dept. of Electr. Eng., Univ. of California, Los Angeles, CA, USA
Abstract :
This paper presents a new class of rate-compatible LDPC codes, protograph-based Raptor-like (PBRL) codes. The proposed PBRL codes are jointly decodable with an iterative belief propagation decoder. As with Raptor codes, additional parity bits can be easily produced by exclusive-or operations on the precoded bits, providing extensive rate compatibility. This paper provides a design procedure that optimizes this class of rate- compatible LDPC codes. The new PBRL codes outperform 3GPP rate-compatible turbo codes with the same short blocklength at high SNR and show no sign of an error floor at the FER region of 10-7.
Keywords :
iterative decoding; parity check codes; turbo codes; 3GPP rate-compatible turbo codes; PBRL code; extensive rate compatibility; iterative belief propagation decoder; protograph-based Raptor-like LDPC codes; rate-compatible LDPC codes; Belief propagation; Decoding; Encoding; Iterative decoding; Optimization; Peer to peer computing;
Conference_Titel :
Global Telecommunications Conference (GLOBECOM 2011), 2011 IEEE
Conference_Location :
Houston, TX, USA
Print_ISBN :
978-1-4244-9266-4
Electronic_ISBN :
1930-529X
DOI :
10.1109/GLOCOM.2011.6134051
