对不对称STT-MRAM通道的代码字位分布和检测值的联合优化
1Department of Information Communication Convergence Technology, Soongsil University, Seoul 06978, Republic of Korea.
Sensors (Basel, Switzerland)
|March 14, 2026
概括
旋转转移扭矩磁随机存储器 (STT-MRAM) 的不对称错误降低了可靠性. 新的值匹配的概率代码 (TMPC) 为改善STT-MRAM系统性能平衡错误概率.
科学领域:
- 电气工程 电气工程
- 计算机科学 计算机科学
- 材料科学 材料科学 材料科学
背景情况:
- 旋转转移扭矩磁性随机访问存储器 (STT-MRAM) 提供非挥发性和低功耗,使其适合传感器网络.
- STT-MRAM中的不对称错误特征,特别是逻辑'0'和'1'错误的概率不平等,影响系统可靠性.
- 当前的错误纠正方法通常假定固定位分布或预设不平衡,忽视它们与检测值的相互作用.
研究的目的:
- 通过共同优化代码字位分布和检测值来最大限度地降低STT-MRAM中的比特错误率 (BER).
- 开发一个编码方案,以考虑STT-MRAM固有的不对称错误通道.
- 为了提高STT-MRAM在传感器网络应用中的可靠性.
主要方法:
- 在一个不对称的级联STT-MRAM通道上,制定了BER最小化作为联合优化问题.
- 导出分析结果显示,当"0"和"1"的错误概率得到平衡时,可以实现最低BER.
- 拟议的值匹配的概率代码 (TMPC) 具有针对最佳检测值的代码词组合.
主要成果:
- 确定了最佳检测值和最低BER的代码词组合之间的内在合.
- 证明TMPC实现的BER值低于现有的稀疏和固定分配代码.
- 在各种STT-MRAM操作条件下展示了TMPC性能,包括严重的写入不对称性和阻力变化.
结论:
- 对比特分布和检测值的联合优化对于减轻STT-MRAM不对称错误至关重要.
- 值匹配的概率代码 (TMPC) 提供了一种原则和灵活的方法来提高STT-MRAM的可靠性.
- 拟议的TMPC框架为基于STT-MRAM的传感器网络和非挥发性内存系统提供了显著的改进.
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