CFO and channel estimation schemes for multi-user massive MIMO systems in high mobility environment

Jaehyung Choi, Jae Hong Kwon, Young-Chai Ko

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

In high mobility environment, the carrier frequency offset (CFO) introduced by Doppler shifts can severely degrade the system performance. On the other hand, orthogonal pilot sequence which is utilized in conventional frame structure for CFO and channel estimation induces large pilot resource consumption as the number of users increases, resulting in low achievable throughput. In this paper, we propose CFO and the uplink channel estimation scheme with semi-orthogonal pilot sequence to improve achievable throughput in multi-user massive multiple-input multiple-output (MIMO) systems. Frame structure with semi-orthogonal pilot sequence is implemented with simultaneous data and pilot sequence. In our proposed scheme, we employ successive interference cancellation (SIC) to distinguish between data and pilot sequence. We demonstrate from simulation results that our proposed estimation scheme can enhance the achievable throughput compared to the conventional one in high mobility situations.

Original languageEnglish
Title of host publication2016 IEEE Conference on Standards for Communications and Networking, CSCN 2016
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9781509038626
DOIs
Publication statusPublished - 2016 Dec 15
Event2016 IEEE Conference on Standards for Communications and Networking, CSCN 2016 - Berlin, Germany
Duration: 2016 Oct 312016 Nov 2

Other

Other2016 IEEE Conference on Standards for Communications and Networking, CSCN 2016
CountryGermany
CityBerlin
Period16/10/3116/11/2

Keywords

  • achievable throughput
  • carrier frequency offset
  • high mobility environment
  • massive MIMO systems
  • semi-orthogonal pilot

ASJC Scopus subject areas

  • Computer Networks and Communications
  • Safety, Risk, Reliability and Quality

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