Channel estimation and analog beam selection for uplink multiuser hybrid beamforming system

Young-Chai Ko, Myeong Jin Kim

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

This paper considers an uplink multiuser hybrid beamforming system where a base station (BS) communicates with multiple users simultaneously. The performance of the uplink multiuser hybrid beamforming system depends on the effective channel which is given by the product of channel matrix and the analog beams. Therefore, to maximize the performance, we need to acquire information of the channels and select the appropriate analog beams from the set of predefined analog beams. In this paper, we propose the channel estimation methods and analog beam selection algorithm for the uplink multiuser hybrid beamforming system. First, we design the estimation methods to exploit the channel information of the users by considering Rayleigh fading and millimeter wave (mmWave) channel models. Then, using the estimated channel information, we propose a low-complexity analog beam selection algorithm for the uplink multiuser hybrid beamforming system. We compare the complexity to show that the proposed analog beam selection algorithm has much less complexity than the exhaustive search-based optimum analog beam selection while the performance loss of the proposed analog beam selection algorithm is not significant compared to the optimum analog beam selection, which is shown by the numerical results.

Original languageEnglish
Article number155
JournalEurasip Journal on Wireless Communications and Networking
Volume2016
Issue number1
DOIs
Publication statusPublished - 2016 Dec 1

Keywords

  • Analog beamforming
  • Digital beamforming
  • Low complexity
  • Uplink multiuser hybrid beamforming

ASJC Scopus subject areas

  • Computer Networks and Communications
  • Signal Processing
  • Computer Science Applications

Fingerprint Dive into the research topics of 'Channel estimation and analog beam selection for uplink multiuser hybrid beamforming system'. Together they form a unique fingerprint.

  • Cite this