标题： 5G NR大规模MIMO无线电中的预编码器实现与优化 显示英文标题

标题： Precoder Implementation and Optimization in 5G NR Massive MIMO Radio

摘要： 5G 新空口（NR）的演进为用户带来了显著的信号强度和服务质量提升。 通过将多输入多输出（MIMO）系统集成到通信中，可以在多个天线间同时传输多路数据流。 此外，MIMO 系统中的预编码技术能够实现更高的数据速率和频谱效率。 在无线网络中，预编码器用于引导高增益波束指向特定用户。 本文聚焦于在印度理工学院马德拉斯分校自主研发的 5G 实验台上远程无线射频头（RRH）中实现 16、32 和 64 通道线性预编码器。 这些预编码器包括一个存储信道矩阵的内存模块，以及在 500 微秒时隙内执行信道矩阵与用户数据之间矩阵乘法的乘法器模块。 该系统展示了对于 (16 x 8)、(32 x 8) 和 (64 x 8) 天线层配置，DSP 利用率分别为 9.75%、19.5% 和 39%，同时块 RAM（BRAM）利用率分别控制在 2.28%、3.91% 和 7.16%。 此外，四层激活情况下达到 1.2 Gbps 的吞吐量，凸显了系统在硬件限制下的优化性能。 显示英文摘要

摘要： The evolution of 5G New Radio (NR) has brought significant improvements in signal strength and service quality for users. By integrating Multiple Input Multiple Output (MIMO) systems into communications, multiple data streams can be transmitted simultaneously across multiple antennas. Additionally, the incorporation of precoding in MIMO systems enables enhanced data rates and spectral efficiency. In wireless networks, precoders are used to steer high-gain beams intended for specific users. This paper focuses on the implementation of 16, 32, and 64 channel linear precoders in the Remote Radio Head (RRH) of the indigenously developed 5G testbed at IIT Madras. These precoders include a memory module to store channel matrices and a multiplier module to perform matrix multiplications between the channel matrices and user data within a slot duration of 500 microseconds. The system demonstrates DSP utilization levels of 9.75%, 19.5%, and 39% for (16 x 8), (32 x 8), and (64 x 8) antenna-layer configurations, respectively, while maintaining Block RAM (BRAM) usage within 2.28%, 3.91%, and 7.16%. Additionally, a throughput of 1.2 Gbps with four active layers highlights the system's optimized performance under hardware constraints.