A Scalable DSP Architecture for Beam Selection in mm-Wave MU-MIMO Systems

• Main Authors: Chun-Yu Yeh, 葉淳育
• Other Authors: Yang, Chia-Hsiang
• Format: Others
• Language: en_US
• Published: 2018
• Online Access: http://ndltd.ncl.edu.tw/handle/698wg4

碩士 === 國立交通大學 === 電子研究所 === 106 === Millimeter-wave communications, operating from 30-300GHz that provides wider available bandwidth, are seen as a promising solution to address data traffic issues. Combined with the concept of beamspace multiple-input multiple-output (B-MIMO) communications, millimeter-wave communications can dramatically reduce radio frequency (RF) complexity through the joint use of discrete lens arrays (DLA) and beam selection techniques. This work adopts Maximum Volume with Dominant Beam Initialization (Maxvol-DBI) algorithm which has much lower complexity, O (nK^2), and comparable spectral efficiency compared to the best of the existing algorithms. This work also implements a Maxvol-DBI beam selection processor that is scalable for higher dimensional MIMO configurations, e.g., 128x64. Computing engine design is based on coordinate rotation digital computers (CORDICs) capable of implementing various arithmetics in a hardware-efficient manner. The proposed Maxvol-DBI processor integrates 360.61k logic gates in an area of 0.5625mm^2 and dissipates 44mW at 266MHz for a 16x8 channel matrix.