MU-MIMO-OFDM with spreading codes for user separation

Kei Nakahara, Kosuke Terui, Yukitoshi Sanada

研究成果: Conference contribution

2 被引用数 (Scopus)

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. In conventional multi-user MIMO systems, the most significant problem is co-channel interference among mobile terminals. The calculation of weight coefficients requires the channel state information (CSI) of all the terminals. Owing to a Doppler shift, the accurate CSI is difficult to obtain for mobile terminals. Signals to the other stationary terminals cause severe interference and beam nulling can not be realized appropriately. Thus, this paper proposes an MU-MIMO-OFDM scheme with orthogonal spreading codes that separates signals for mobile terminals. Numerical results obtained through computer simulation show that the proposed scheme improves bit error rate (BER) performance by 2.5dB at a BER of 10-3 in comparison with the conventional MU-MIMO on a Rayleigh fading channel.

本文言語English
ホスト出版物のタイトル2017 IEEE International Symposium on Personal, Indoor and Mobile Radio Communications
ホスト出版物のサブタイトルEngaged Citizens and their New Smart Worlds, PIMRC 2017 - Conference Proceedings
出版社Institute of Electrical and Electronics Engineers Inc.
ページ1-6
ページ数6
ISBN(電子版)9781538635315
DOI
出版ステータスPublished - 2018 2 14
イベント28th Annual IEEE International Symposium on Personal, Indoor and Mobile Radio Communications, PIMRC 2017 - Montreal, Canada
継続期間: 2017 10 82017 10 13

出版物シリーズ

名前IEEE International Symposium on Personal, Indoor and Mobile Radio Communications, PIMRC
2017-October

Other

Other28th Annual IEEE International Symposium on Personal, Indoor and Mobile Radio Communications, PIMRC 2017
国/地域Canada
CityMontreal
Period17/10/817/10/13

ASJC Scopus subject areas

  • 電子工学および電気工学

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