arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2108.06229cs.ITeess.SPmath.IT
收藏

全数字mmWave大规模MU-MIMO的硬件感知波束空间预编码

Hardware-Aware Beamspace Precoding for All-Digital mmWave Massive MU-MIMO

Emre Gönültaş, Sueda Taner, Alexandra Gallyas-Sanhueza, Seyed Hadi Mirfarshbafan, Christoph Studer

摘要:

在毫米波(mmWave)频率下操作的大规模多用户多输入多输出(MU-MIMO)无线系统使得能够向大量用户同时进行宽带数据传输。为了降低全数字基站架构中MU预编码的复杂度,我们提出了一种两阶段预编码架构,该架构首先使用波束空间域中的稀疏矩阵执行预编码,然后进行快速傅立叶逆变换,将结果转换到天线域。稀疏预编码矩阵需要少量乘法器,并支持常规硬件架构,这允许设计硬件高效的全数字预编码器。仿真结果表明,我们的方法接近传统的维纳滤波器预编码的错误率与超过2倍降低复杂度。

英文摘要:

Massive multi-user multiple-input multiple-output (MU-MIMO) wireless systems operating at millimeter-wave (mmWave) frequencies enable simultaneous wideband data transmission to a large number of users. In order to reduce the complexity of MU precoding in all-digital basestation architectures, we propose a two-stage precoding architecture that first performs precoding using a sparse matrix in the beamspace domain, followed by an inverse fast Fourier transform that converts the result to the antenna domain. The sparse precoding matrix requires a small number of multipliers and enables regular hardware architectures, which allows the design of hardware-efficient all-digital precoders. Simulation results demonstrate that our methods approach the error-rate of conventional Wiener filter precoding with more than 2x reduced complexity.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑