发明授权
US08301979B2 Low density parity code (LDPC) decoding for memory with multiple log likelihood ratio (LLR) decoders
有权
具有多对数似然比(LLR)解码器的存储器的低密度奇偶校验码(LDPC)解码
- 专利标题: Low density parity code (LDPC) decoding for memory with multiple log likelihood ratio (LLR) decoders
- 专利标题(中): 具有多对数似然比(LLR)解码器的存储器的低密度奇偶校验码(LDPC)解码
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申请号: US12574982申请日: 2009-10-07
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公开(公告)号: US08301979B2公开(公告)日: 2012-10-30
- 发明人: Eran Sharon , Idan Alrod , Ariel Navon , Opher Lieber
- 申请人: Eran Sharon , Idan Alrod , Ariel Navon , Opher Lieber
- 申请人地址: IL Kfar Saba
- 专利权人: SanDisk IL Ltd.
- 当前专利权人: SanDisk IL Ltd.
- 当前专利权人地址: IL Kfar Saba
- 代理机构: Vierra Magen Marcus & DeNiro LLP
- 主分类号: G11C29/00
- IPC分类号: G11C29/00
摘要:
Data stored in memory is decoded using iterative probabilistic decoding and multiple decoders. A first decoder attempts to decode a representation of a codeword. If the attempt is unsuccessful, a second decoder attempts to decode the representation of a codeword. The second decoder may have a lower resolution than the first decoder. Probability values such as logarithmic likelihood ratio (LLR) values may be clipped in the second decoder. This approach can overcome trapping sets while exhibiting low complexity and high performance. Further, it can be implemented on existing decoders such as those used in current memory devices.
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