BayesBB: A 9.6Gbps 1.61ms Configurable All-MessagePassing Baseband-Accelerator for B5G/6G Cell-Free Massive-MIMO in 40nm CMOS

📋 论文概要

本文提出BayesBB，一种支持B5G/6G去蜂窝大规模MIMO的9.6Gbps可配置全消息传递基带加速器。采用40nm工艺实现了1.61ms的低系统延迟，解决了传统基带处理的高延迟和低吞吐量问题。

💡 主要创新点

• 提出全展开流水线架构的MIMO-BP检测器，5次迭代实现1.44ms检测延迟。
• 基于高斯近似干扰测量和后验消息累加，高效计算符号先验概率和比特LLR消息。
• 实现可配置的全消息传递加速，支持9.6Gbps吞吐率和1.61ms系统延迟。

🏷 关键词

📄 原文摘要

7.4 illustrates the implementation details of the MIMO-BP detector, utilizing a fully unfolded architecture with 5 iterations. The Gaussian approximation of interference is first measured to support the posterior message calculation. Then, the posterior messages are buffered and accumulated to compute the symbol prior probability. Finally, bit LLR messages are derived from the symbol prior probability. The detector benefits from a fully unfolded and pipelined architecture, enjoying a detection latency of 1.44ms. The low-latency detector results in a system latency of 1.61ms, which represents a 2.5× reduction compared to the user latency of 5G [1]. 1 2 The global success of 5G wireless exerts a significant impact on human life [1]. For the forthcoming beyond-5G (B5G) and 6G eras [2], there is demand for wireless networks

👥 作者与机构

Yi Zhang*1,2, Wenyue Zhou*1,2, Yiwei Zhang1,2, Houren Ji1,2, Yongming Huang1,2,

Xiaohu You1,2, Chuan Zhang1,2 Southeast University, Nanjing, China Purple Mountain Laboratories, Nanjing, China *Equally Credited Authors (ECA) Figure 2