期刊
IEEE TRANSACTIONS ON COMMUNICATIONS
卷 70, 期 4, 页码 2227-2239出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TCOMM.2022.3156074
关键词
Resistance; Interference; Decoding; Detectors; Polar codes; Arrays; Electrical resistance measurement; Resistive random access memory; sneak path; belief propagation; polar codes
资金
- National Key R&D Program of China [2020YFB1807203]
- National Natural Science Foundation of China [61871032, RIE2020, A18A6b0057]
- National Research Foundation, Singapore
- Infocomm Media Development Authority
- SUTD Growth Plan Grant
This paper proposes a novel belief propagation (BP) based detector for sneak path interference in ReRAM and combines it with a BP decoder of polar codes to improve the error rate performance of ReRAM.
Despite the great promises that the resistive random access memory (ReRAM) has shown as the next generation of non-volatile memory technology, its crossbar array structure leads to a severe sneak path interference to the signal read back from the memory cell. In this paper, we first propose a novel belief propagation (BP) based detector for the sneak path interference in ReRAM. Based on the conditions for a sneak path to occur and the dependence of the states of the memory cells that are involved in the sneak path, a Tanner graph for the ReRAM channel is constructed, inside which specific messages are updated iteratively to get a better estimation of the sneak path affected cells. We further combine the graph of the designed BP detector with that of the BP decoder of the polar codes to form a joint detector and decoder. Tailored for the joint detector and decoder over the ReRAM channel, effective polar codes are constructed using the genetic algorithm. Simulation results show that the BP detector can effectively detect the cells affected by the sneak path, and the proposed polar codes and the joint detector and decoder can significantly improve the error rate performance of ReRAM.
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