MIRAIT Technologies Corporation

Japan

MIRAIT Technologies Corporation

Japan
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News Article | September 29, 2017
Site: www.businesswire.com

TOKYO--(BUSINESS WIRE)--MIRAIT Technologies Corporation (Head office: Nishi-Ku, Osaka, President: Kouichi Takahatake) is proud to announce the opening of branch office in Singapore. MIRAIT Technologies Corporation (MTC), a telecommunication engineering company is expanding its business in Asia Pacific region. MTC actively collaborates with APAC Partners to create new market for IT engineering and service sector focusing on design, construction, system integration and maintenance of communication facility. “Our success always comes with prosperous relationship among Customers, APAC and MIRAIT Group. We are also aiming to develop regional engineering skills, which we believe are indispensable for our business,” said Mamoru Tanaka, Senior Corporate Officer and Head of Global Business Department at MTC. With the establishment of Singapore branch, the company expects to play a key role in the development of telecommunication as well as power facilities engineering sector and be an active participant in the ICT infrastructure growth in APAC region. MIRAIT Technologies Corporation has been in operation for over 50 years, having delivered high-impact projects in more than 60 countries, it has contributed to the evolution and trends of communications network infrastructure around the world. The company has established three overseas subsidiaries in Australia, Philippines, and Myanmar.


Yamaguchi K.,Tokyo University of Science, Suwa | Yamaguchi T.,Tokyo University of Science, Suwa | Ginoza N.,Tokyo University of Science, Suwa | Abe K.,Tokyo University of Science, Suwa | And 4 more authors.
International Conference on Information Networking | Year: 2017

In this paper, the transmission performance considering an error of channel state information (CSI) feedback for a downlink mobile WiMAX system with multiuser multiple-input multiple-output (MU-MIMO) systems in a computer simulation and field experiment are described. In computer simulation, a downlink MU-MIMO system can be realized by using the block diagonalization algorithm, and each user can receive signals without any signal interference from other users by using the perfect CSI feedback. The bit error ratio performance and channel capacity in accordance with the errors of CSI were simulated in a multipath fading environment. In the field experiment, the received power and downlink throughput in the UDP layer were measured on an experimental mobile WiMAX system developed in Azumino City in Japan. In comparison with the simulated and experimental results, it was confirmed that the maximum throughput performance in the downlink had almost the same performance as the simulated throughput when the error of CSI was 30 %. © 2017 IEEE.


Yamaguchi K.,Tokyo University of Science, Suwa | Nagahashi T.,Tokyo University of Science, Suwa | Akiyama T.,Tokyo University of Science, Suwa | Matsue H.,Tokyo University of Science, Suwa | And 4 more authors.
International Conference on Information Networking | Year: 2015

In this paper, transmission performance for downlink MU-MIMO (Multiuser Multiple-Input Multiple-Output) systems with computer simulation and field experiment are described. The downlink MU-MIMO system is constructed as a transmitter with 6 antennas and receivers with 2 antennas, and the maximum number of users(receivers) is 3. In computer simulation, MU-MIMO transmission system can be realized by using the BD (Block Diagonalization) algorithm, and each user can receive signals without any signal interferences between the other users. BER (Bit Error Rate) performance and channel capacity according to modulation schemes and the number of streams are simulated in spatially correlated multipath fading environment. In field experiment, received power and downlink throughput in UDP layer are measured on the mobile WiMAX system developed at Azumino City in Japan. Compared with the simulated and experimented results, the measured maximum throughput performance in downlink has almost the same performance with the simulated throughput. It is confirmed that the experimental mobile WiMAX system for MU-MIMO transmission is actually performed for increasing the total channel capacity of the system. © 2015 IEEE.


Yamaguchi K.,Tokyo University of Science, Suwa | Nagahashi T.,Tokyo University of Science, Suwa | Akiyama T.,Tokyo University of Science, Suwa | Yamaguchi T.,Tokyo University of Science, Suwa | And 5 more authors.
International Conference on ICT Convergence | Year: 2014

In this paper, transmission performance for downlink MU-MIMO (Multiuser Multiple-Input Multiple-Output) systems with computer simulation and field experiment are described. The downlink MU-MIMO system is constructed as a transmitter with 6 antennas and receivers with 2 antennas, and the maximum number of users(receivers) is 3. In computer simulation, MU-MIMO transmission system can be realized by using the BD (Block Diagonalization) algorithm, and each user can receive signals without any signal interferences between the other users. BER (Bit Error Rate) performance and channel capacity according to modulation schemes and the number of streams are simulated in spatially uncorrelated and correlated multipath fading environment. In field experiment, downlink throughput on UDP layer are measured on the mobile WiMAX system with Matrix A mode and Matrix B mode developed at Azumino City in Japan. Compared with the simulated and experimented results, the measured maximum throughput performance in downlink has almost the same performance with the simulated throughput. It is confirmed that the experimental mobile WiMAX system for MU-MIMO transmission is actually performed for increasing the total channel capacity of the system. © 2014 IEEE.


Yamaguchi K.,Tokyo University of Science, Suwa | Nagahashi T.,Tokyo University of Science, Suwa | Akiyama T.,Tokyo University of Science, Suwa | Matsue H.,Tokyo University of Science, Suwa | And 4 more authors.
Scientific World Journal | Year: 2015

The transmission performance for a downlink mobile WiMAX system with multiuser multiple-input multiple-output (MU-MIMO) systems in a computer simulation and field experiment is described. In computer simulation, a MU-MIMO transmission system can be realized by using the block diagonalization (BD) algorithm, and each user can receive signals without any signal interference from other users. The bit error rate (BER) performance and channel capacity in accordance with modulation schemes and the number of streams were simulated in a spatially correlated multipath fading environment. Furthermore, we propose a method for evaluating the transmission performance for this downlink mobile WiMAX system in this environment by using the computer simulation. In the field experiment, the received power and downlink throughput in the UDP layer were measured on an experimental mobile WiMAX system developed in Azumino City in Japan. In comparison with the simulated and experimented results, the measured maximum throughput performance in the downlink had almost the same performance as the simulated throughput. It was confirmed that the experimental mobile WiMAX system for MU-MIMO transmission successfully increased the total channel capacity of the system. © 2015 Kazuhiro Yamaguchi et al.


PubMed | MIRAIT Technologies Corporation, Tokyo University of Science, Suwa, Azumino City and NPO CCC21L
Type: | Journal: TheScientificWorldJournal | Year: 2015

The transmission performance for a downlink mobile WiMAX system with multiuser multiple-input multiple-output (MU-MIMO) systems in a computer simulation and field experiment is described. In computer simulation, a MU-MIMO transmission system can be realized by using the block diagonalization (BD) algorithm, and each user can receive signals without any signal interference from other users. The bit error rate (BER) performance and channel capacity in accordance with modulation schemes and the number of streams were simulated in a spatially correlated multipath fading environment. Furthermore, we propose a method for evaluating the transmission performance for this downlink mobile WiMAX system in this environment by using the computer simulation. In the field experiment, the received power and downlink throughput in the UDP layer were measured on an experimental mobile WiMAX system developed in Azumino City in Japan. In comparison with the simulated and experimented results, the measured maximum throughput performance in the downlink had almost the same performance as the simulated throughput. It was confirmed that the experimental mobile WiMAX system for MU-MIMO transmission successfully increased the total channel capacity of the system.

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