TY - GEN
T1 - MU-MIMO-OFDM with Analog Beamforming and Spreading Codes for User Separation
AU - Nakahara, Kei
AU - Terui, Kosuke
AU - Sanada, Yukitoshi
N1 - Funding Information:
ACKNOWLEDGMENTS This work is supported in part by a Grant-in-Aid for Scientific Research (C) under Grant No.16K06366 from the Ministry of Education, Culture, Sport, Science, and Technology in Japan.
Publisher Copyright:
© 2018 IEEE.
PY - 2018/11
Y1 - 2018/11
N2 - 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 The channel state information (CSI) of the terminals are outdated owing to a Doppler shift if there is a time lag between channel estimation and CSI feedback.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.
AB - 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 The channel state information (CSI) of the terminals are outdated owing to a Doppler shift if there is a time lag between channel estimation and CSI feedback.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.
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U2 - 10.1109/ISPACS.2018.8923351
DO - 10.1109/ISPACS.2018.8923351
M3 - Conference contribution
AN - SCOPUS:85077074405
T3 - ISPACS 2018 - 2018 International Symposium on Intelligent Signal Processing and Communication Systems
SP - 96
EP - 101
BT - ISPACS 2018 - 2018 International Symposium on Intelligent Signal Processing and Communication Systems
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 2018 International Symposium on Intelligent Signal Processing and Communication Systems, ISPACS 2018
Y2 - 27 November 2018 through 30 November 2018
ER -