TY - GEN
T1 - MU-MIMO-OFDM with spreading codes for user separation
AU - Nakahara, Kei
AU - Terui, Kosuke
AU - Sanada, Yukitoshi
N1 - Funding Information:
ACKNOWLEDGMENTS The authors gratefully acknowledge the support of Fujitsu Laboratories LTD.
Publisher Copyright:
© 2017 IEEE.
PY - 2017/7/2
Y1 - 2017/7/2
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. 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.
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. 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.
UR - http://www.scopus.com/inward/record.url?scp=85045231869&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85045231869&partnerID=8YFLogxK
U2 - 10.1109/PIMRC.2017.8292172
DO - 10.1109/PIMRC.2017.8292172
M3 - Conference contribution
AN - SCOPUS:85045231869
T3 - IEEE International Symposium on Personal, Indoor and Mobile Radio Communications, PIMRC
SP - 1
EP - 6
BT - 2017 IEEE International Symposium on Personal, Indoor and Mobile Radio Communications
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 28th Annual IEEE International Symposium on Personal, Indoor and Mobile Radio Communications, PIMRC 2017
Y2 - 8 October 2017 through 13 October 2017
ER -