An efficient radix-4 Quasi-cyclic shift network for QC-LDPC decoders

IEICE Electronics Express

Sabooh Ajaz¹  Hanho Lee¹ 

[1] Dept. of Information and Communication Engr., Inha University

关键词: shift network;    LDPC;    multi-size barrel shifter;    Radix-4;   

DOI  :  10.1587/elex.11.20130837

学科分类：电子、光学、磁材料

来源: Denshi Jouhou Tsuushin Gakkai

【 摘 要 】

References(6)A Radix-4 Quasi-cyclic shift network (QSN) for reconfigurable QC-LDPC decoders is presented in this paper. A complexity reduction technique is described to reduce the total gate count at each stage in addition to the fact that Radix-4 logarithmic barrel shifter naturally offers less number of stages compared to Radix-2. The proposed Radix-4 QSN architecture supports various code rates and all sizes of sub matrices. Moreover, a novel Radix-4 signal generator is proposed which is particularly an essential element for reconfigurable LDPC decoders. The synthesis, placement and routing (P & R) of the proposed network is performed using TSMC 90-nm standard cell CMOS technology. The implementation results shows that the proposed network outperforms its predecessors by about 11% and 38% in terms of area and clock frequency respectively.

【 授权许可】

Unknown