Constraint-Aware Annealing for CMOS-Based Ising Machine LDPC Decoder

IF 4 2区 工程技术 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC
Eslam Elmitwalli;Zeljko Ignjatovic;Selçuk Köse
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引用次数: 0

Abstract

Ising machines are efficient hardware solvers for combinatorial optimization problems (COPs). In CMOS-based Ising machines, the annealing process is crucial for efficiently navigating complex energy landscapes in mapped COPs such as Max-Cut and low-density parity-check (LDPC) decoding. QuBRIM, a CMOS-based Ising machine, has recently been utilized to solve LDPC decoding problems using multi-body interactions. A constraint-aware annealing schedule is proposed that increases the efficiency of solving the mapped COP. The proposed annealing method uses knowledge of the LDPC decoding problem to guide the annealing process. The annealing schedule is demonstrated through high-level simulations. The proposed methodology demonstrates a normalized energy efficiency (NEE) of 0.68 pJ/bit/iteration, which is a 1.8x improvement over random bit-flip annealing, and an 80% increase in throughput.
基于cmos的lpc解码器约束感知退火
伊辛机是组合优化问题(cop)的高效硬件求解器。在基于cmos的Ising机器中,退火过程对于有效地导航映射cop(如Max-Cut和低密度奇偶校验(LDPC)解码)中的复杂能量景观至关重要。QuBRIM是一种基于cmos的Ising机器,最近被用于解决使用多体相互作用的LDPC解码问题。提出了一种约束感知退火方案,提高了求解映射COP问题的效率。所提出的退火方法利用LDPC解码问题的知识来指导退火过程。通过高级模拟验证了退火程序。所提出的方法证明了0.68 pJ/bit/迭代的归一化能量效率(NEE),比随机位翻转退火提高1.8倍,吞吐量提高80%。
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来源期刊
IEEE Transactions on Circuits and Systems II: Express Briefs
IEEE Transactions on Circuits and Systems II: Express Briefs 工程技术-工程:电子与电气
CiteScore
7.90
自引率
20.50%
发文量
883
审稿时长
3.0 months
期刊介绍: TCAS II publishes brief papers in the field specified by the theory, analysis, design, and practical implementations of circuits, and the application of circuit techniques to systems and to signal processing. Included is the whole spectrum from basic scientific theory to industrial applications. The field of interest covered includes: Circuits: Analog, Digital and Mixed Signal Circuits and Systems Nonlinear Circuits and Systems, Integrated Sensors, MEMS and Systems on Chip, Nanoscale Circuits and Systems, Optoelectronic Circuits and Systems, Power Electronics and Systems Software for Analog-and-Logic Circuits and Systems Control aspects of Circuits and Systems.
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