C.-Y. YehT.-C. ChuC.-E. ChenCHIA-HSIANG YANG2019-10-312019-10-31201815498328https://scholars.lib.ntu.edu.tw/handle/123456789/429770https://www.scopus.com/inward/record.uri?eid=2-s2.0-85051829815&doi=10.1109%2fTCSI.2018.2856124&partnerID=40&md5=c9d7c7bf04352d954cd0d7edb6020409Millimeter-wave (mm-Wave) communication, operating from 30-to 300-GHz bands with wider available spectrum, has now emerged as a promising solution for future wireless systems. To reduce the hardware complexity of mm-Wave transceivers, beam-selection techniques combined with beamspace multiple-input multiple-output (MIMO) communications have been proposed in the literature. In such a system, beam selection is performed to exploit the near-sparse nature in the mm-Wave channel and, hence, is crucial to the system performance. This paper presents the world's first digital signal processing (DSP) architecture design for beam selection operation in an mm-Wave multi-user MIMO system. A computationally efficient beam-selection algorithm is first presented. Based on the proposed algorithm, a hardware-scalable beam selection processor is implemented using coordinate rotation digital computers arithmetic. To establish the validity of the concept, the proposed processor is implemented in a 40-nm CMOS technology, integrating 360k logic gates in an area of 0.5625 mm2, while dissipating 44 mW at 266 MHz in an MU-MIMO system with 16 beams and 8 users. © 2018 IEEE.Beam selection; beamspace MIMO; CORDIC; hybrid beamformer; mm-wave[SDGs]SDG7Computer hardware; Digital computers; Digital signal processing; MIMO systems; Radio transceivers; Beam selection; Beam space; CORDIC; Hybrid beamformer; Mm waves; Millimeter wavesjournal article10.1109/tcsi.2018.28561242-s2.0-85051829815