High-throughput QC-LDPC decoder with cost-effective early termination scheme for non-volatile memory systems

This paper presents a high-throughput layered min-sum quasi-cyclic LDPC (QC-LDPC) decoder for non-volatile memory systems (NVMs). A cost-effective column-based early termination (CB-ET) scheme is proposed to early terminate decoding process within iteration. The throughput improvement is 37.7% compared to the state-of-the-art early termination scheme when raw bit error rate of flash memory is 3×10 -3 . The QC-LDPC decoder with proposed early termination scheme is synthesized by TSMC 90nm CMOS technology, and the area overhead is only 2.20%.