Indoor experiments on real-time multiuser MIMO transmission in wireless LAN systems

This paper presents indoor experimental results on an implemented real-time downlink multiuser multiple-input multiple-output (DL-MU-MIMO) transceiver for next generation wireless LAN systems. In the transceiver, channel state information (CSI) is estimated at each station (STA) and fed back to an a...

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Bibliographic Details
Main Authors: Ishihara, K., Asai, Y., Kudo, R., Ichikawa, T., Mizoguchi, M.
Format: Conference Proceeding
Language:English
Subjects:
Array signal processing
downlink
MIMO
Modulation
multiuser MIMO
OFDM
Throughput
Transceivers
Transmitting antennas
wireless LAN
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Summary:This paper presents indoor experimental results on an implemented real-time downlink multiuser multiple-input multiple-output (DL-MU-MIMO) transceiver for next generation wireless LAN systems. In the transceiver, channel state information (CSI) is estimated at each station (STA) and fed back to an access point (AP) on a real-time basis. At the AP, transmit beamforming weight for DL-MU-MIMO transmission is calculated by using the estimated CSI. This paper also proposes a fast computation scheme for computing transmit weight in real time. Indoor experiments with the DL-MU-MIMO transceiver demonstrate its feasibility. The experimental results clarify that DL-MU-MIMO transmission can achieve system throughput of greater than 500 Mbit/s with simple digital signal processing of single-antenna STAs in an indoor environment.
ISSN:1525-3511
1558-2612
DOI:10.1109/WCNC.2012.6214015