非易失性存储器的平衡调制
Balanced Modulation for Nonvolatile Memories
摘要：
本文提出了一种实用的非易失性存储器的写/读方案，称为平衡调制，用于最小化误差的非对称分量。其主要思想是使用平衡的纠错码对数据进行编码。当从一个块中读取信息时，它会调整读取阈值，以便得到的字也是平衡的或近似平衡的。平衡调制对于任何单元级分布都具有次优性能，并且它可以容易地在非易失性存储器的当前系统中实现。在此基础上，研究了平衡纠错码，特别是平衡LDPC码的构造。它具有非常高效的编码和解码算法，并且比现有的平衡纠错码构造更高效。
英文摘要：
This paper presents a practical writing/reading scheme in nonvolatile memories, called balanced modulation, for minimizing the asymmetric component of errors. The main idea is to encode data using a balanced error-correcting code. When reading information from a block, it adjusts the reading threshold such that the resulting word is also balanced or approximately balanced. Balanced modulation has suboptimal performance for any cell-level distribution and it can be easily implemented in the current systems of nonvolatile memories. Furthermore, we studied the construction of balanced error-correcting codes, in particular, balanced LDPC codes. It has very efficient encoding and decoding algorithms, and it is more efficient than prior construction of balanced error-correcting codes.
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