MU-MIMO-OFDM with Analog Beamforming and Spreading Codes for User Separation

Kei Nakahara, Kosuke Terui, Yukitoshi Sanada

研究成果: Conference contribution

抄録

This paper presents a multiuser (MU)-multiple-input multiple-output (MIMO)-orthogonal frequency division multiplexing (OFDM) scheme that realizes signal separation among mobile terminals by spreading codes on top of analog beamforming with analog-digital hybrid massive MIMO. Multiuser MIMO scheme suffers from interference among terminals caused by inaccurate information of channel responses. The channel state information (CSI) of the terminals are outdated owing to a Doppler shift if there is a time lag between channel estimation and CSI feedback. Thus, this paper proposes an MU-MIMO-OFDM scheme with analog-digital hybrid massive MIMO and orthogonal spreading codes that separates signals for mobile terminals. Numerical results obtained through computer simulation show that on WINNER II Umi NLOS channel the proposed scheme improves bit error rate (BER) performance by 1.0dB at a bit error rate of 10-3 in comparison with the conventional MU-MIMO.

本文言語English
ホスト出版物のタイトルISPACS 2018 - 2018 International Symposium on Intelligent Signal Processing and Communication Systems
出版社Institute of Electrical and Electronics Engineers Inc.
ページ96-101
ページ数6
ISBN(電子版)9781538657713
DOI
出版ステータスPublished - 2018 11月
イベント2018 International Symposium on Intelligent Signal Processing and Communication Systems, ISPACS 2018 - Ishigaki Island, Okinawa, Japan
継続期間: 2018 11月 272018 11月 30

出版物シリーズ

名前ISPACS 2018 - 2018 International Symposium on Intelligent Signal Processing and Communication Systems

Conference

Conference2018 International Symposium on Intelligent Signal Processing and Communication Systems, ISPACS 2018
国/地域Japan
CityIshigaki Island, Okinawa
Period18/11/2718/11/30

ASJC Scopus subject areas

  • 人工知能
  • コンピュータ ネットワークおよび通信
  • コンピュータ サイエンスの応用
  • 信号処理

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