Indoor Experiments on 4-by-2 Multi-User MIMO and Carrier Aggregation Achieving Real-Time 1-Gbps Data Transmission in LTE-Advanced Downlink

• KAKISHIMA Yuichi

  Radio Access Network Development Department, NTT DOCOMO, INC.

• KAWAMURA Teruo

  Radio Access Network Development Department, NTT DOCOMO, INC.

• KISHIYAMA Yoshihisa

  Radio Access Network Development Department, NTT DOCOMO, INC.

• ANDOH Hidehiro

  Radio Access Network Development Department, NTT DOCOMO, INC.

抄録

This paper presents indoor experimental results on 4-by-2 multi-user (MU)-MIMO transmission with carrier aggregation (90-MHz bandwidth) achieving real-time 1-Gbps data transmission using adaptive modulation and coding (AMC) in the LTE-Advanced downlink employing OFDMA radio access. In the experiments, eigenvalue decomposition (EVD)-based channel state information (CSI) feedback based on subband unit for MU-MIMO operation and inter-user interference whitening filter applied before maximum likelihood detection (MLD) are employed to achieve such a high data rate with realistic numbers of transmitter and receiver antennas. The indoor experiments are conducted in a conference room under line-of-sight conditions with multiple reflected waves where one mobile station (MS) travels at walking speed and the other MS is static. The experimental results show that the total throughput for the 2 MSs is greater than 1Gbps at the average received signal-to-interference plus noise power ratio (SINR) of approximately 25 and 17dB for the first and second streams of each MS, respectively, when the moving speed is up to approximately 1km/h. The results also show that a centralized transmitter antenna arrangement is more effective in order to achieve a high data rate such as 1Gbps compared to a distributed antenna arrangement for the measurement environment.

収録刊行物

• IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences

  IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences E97.A (1), 109-116, 2014

  一般社団法人 電子情報通信学会

キーワード

• LTE-Advanced
• OFDMA
• multi-user MIMO
• antenna arrangement
• indoor experiment

詳細情報

• CRID: 1390282681288632192
• NII論文ID: 130003385334
• NII書誌ID: AA10826239
• DOI: 10.1587/transfun.e97.a.109
• ISSN: 17451337
• ISSN: 09168508
• NDL書誌ID: 025114294
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I025114294
• Web Site: https://www.jstage.jst.go.jp/article/transfun/E97.A/1/E97.A_109/_pdf
• 本文言語コード: en
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