Jul 10, 2023 13:19 JST

Source: NEC Corporation

NEC demonstrates advantages of distributed-MIMO in ultra-high-density user environments

TOKYO, Jul 10, 2023 - (JCN Newswire) - NEC Corporation (NEC; TSE: 6701) has conducted verification tests to evaluate the performance of massive-MIMO (mMIMO)(1) utilizing the 28GHz band. During these tests, NEC verified mMIMO's ability to reliably provide large-capacity transmission in environments with extremely high user densities of 4 to 8 users per square meter, such as stadiums and crowded urban areas. Moreover, the tests demonstrated that distributed-MIMO configurations(2) can maintain better data transmission than conventional collocated-MIMO configurations(3).


mMIMO mobile access base stations enable multiple simultaneous user connections and achieve higher cell capacity with a combination of spatial, time division and frequency division multiplexing. Using a 28GHz-band prototype device(4), NEC quantitatively compared users' signal-to-noise ratio (SNR) in both distributed-MIMO and collocated-MIMO using a newly developed index for this demonstration.

The SNR of spatial multiplexing in mMIMO is influenced by the amount of leaked power from beams to other users in the same cell. However, in comparison to collocated-MIMO configurations, NEC confirmed that distributed-MIMO could maintain SNR independent of user density depending on the sharpness and level of orthogonality of the beams.

Details on this research have been published and presented at the International Microwave Symposium 2023 in San Diego, CA, USA.

Going forward, in line with the advancement of 5G and the development of 6G, NEC will continue to develop technologies aimed at even higher speeds, larger capacities, and greater cost efficiency.

(1) Massive-MIMO
A Multiple Input Multiple Output (MIMO) technique that enables simultaneous multiple radio communication connections using a massive number of transceivers.
(2) Distributed-MIMO
An approach of Massive-MIMO where a large number of antennas are distributed rather than being placed in a single array.
(3) Collocated-MIMO
A conventional approach of Massive-MIMO where the antenna element and transceivers are arrenged in a location with usually half wavelength intervals.
(4) NEC develops millimeter-wave distributed antenna radio unit improving the channel quality for indoor 5G applications. www.nec.com/en/press/202001/global_20200124_01.html

About NEC Corporation

NEC Corporation has established itself as a leader in the integration of IT and network technologies while promoting the brand statement of "Orchestrating a brighter world." NEC enables businesses and communities to adapt to rapid changes taking place in both society and the market as it provides for the social values of safety, security, fairness and efficiency to promote a more sustainable world where everyone has the chance to reach their full potential. For more information, visit NEC at www.nec.com.

Source: NEC Corporation
Sectors: Telecoms, 5G, Wireless, Apps

Copyright ©2023 JCN Newswire. All rights reserved. A division of Japan Corporate News Network.

Related Press Release

NEC named among IAM's 2023 Asia IP Elite
December 01 2023 13:50 JST
NEC X and Entrepreneurs Roundtable Accelerator (ERA) Forge Strategic Partnership to Advance East Coast-based Startups
November 29 2023 17:37 JST
NEC Thailand collaborates with Industrial Estate Authority of Thailand to monitor and manage industrial waste in 14 industrial estates
November 10 2023 11:05 JST
Yazaki Corporation and NEC use AI to automatically develop operation plans for multiple robots
November 09 2023 12:27 JST
Kagome, NEC and DXAS introduce agricultural ICT platform "CropScope" to tomato field in northern Italy, saving water and increasing yield
November 09 2023 11:15 JST
NEC and Gurobi Optimization Sign System Integration Partnership Agreement
November 08 2023 15:47 JST
Newly developed data infrastructure for accelerating Open Science through industry-university collaboration in Japan
November 07 2023 12:25 JST
NEC launches free "FireDucks" software for accelerating data analysis using Python
October 19 2023 10:18 JST
NEC and Freshwave Collaborate on Open RAN Project to Deliver Next-Generation Multi-Operator Neutral Host Small Cell Solution for High Traffic Areas
October 17 2023 14:26 JST
NEC awarded the Telecom Infra Project's "Silver Badge" for its disaggregated 400G transponder solution
October 12 2023 17:39 JST
More Press release >>

Latest Press Release

More Latest Release >>