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 ©2025 JCN Newswire. All rights reserved. A division of Japan Corporate News Network.

Related Press Release


Executive Appointments in Connection with the Establishment of NESIC Holdings
June 23 2025 18:22 JST
 
NEC and Chugai Pharmaceutical use AI to potentially enhance cancer treatment
June 18 2025 12:40 JST
 
Transgene and NEC Present Durable Disease-Free Survival and Sustained T Cell Responses at 24 months with Individualized Cancer Vaccine TG4050
June 02 2025 16:56 JST
 
IFS and NEC Strengthen their Strategic Partnership to Create New Value
May 30 2025 09:11 JST
 
NEC DGDF Headquarters relocates to Zurich to accelerate growth and enhance management globally
April 28 2025 15:03 JST
 
NEC invests in U.S.-based "Geodesic Alliance Fund" aiming to strengthen economic security business
April 24 2025 09:23 JST
 
NEC Face Recognition Ranks First in NIST Accuracy Testing
April 09 2025 10:09 JST
 
NEC Orchestrating Future Fund invests in Rescale, Inc., provider of a leading digital engineering platform for cloud high-performance computing (HPC)
April 08 2025 15:42 JST
 
SITA and NEC Collaborate to Drive Global Adoption of Digital Identities in Travel
April 08 2025 15:11 JST
 
NEC has developed technologies that enable a secure workflow for personalized cancer vaccines and has proven their capabilities
April 01 2025 15:15 JST
 
More Press release >>

Latest Press Release


More Latest Release >>