Title :
Flexible decoder architectures for irregular QC-LDPC codes
Author :
Kuo, Tzu-chieh ; Willson, Alan N.
Author_Institution :
Dept. of Electr. Eng., Univ. of California, Los Angeles, CA
Abstract :
A flexible and power-efficient decoder architecture employing the layered-decoding message-passing algorithm and the low-complexity offset-based Min-Sum check algorithm for irregular QC-LDPC codes is presented in this paper. The architecture is verified by implementing a programmable decoder chip compliant with the QC-LDPC codes in Mobile WiMAX standard. Compared to other published decoder implementations, the prototype decoder is 53% smaller and has better energy efficiency.
Keywords :
WiMax; broadband networks; error correction codes; parity check codes; radio access networks; Mobile WiMAX standard; flexible decoder architectures; irregular QC-LDPC codes; layered-decoding message-passing algorithm; low-complexity offset-based Min-Sum check algorithm; programmable decoder chip; Application specific integrated circuits; Code standards; Decoding; Energy efficiency; Joining processes; Parity check codes; Prototypes; USA Councils; Very large scale integration; WiMAX;
Conference_Titel :
Circuits and Systems, 2008. MWSCAS 2008. 51st Midwest Symposium on
Conference_Location :
Knoxville, TN
Print_ISBN :
978-1-4244-2166-4
Electronic_ISBN :
1548-3746
DOI :
10.1109/MWSCAS.2008.4616778
