MIMO


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MIMO

(Multiple Input/Multiple Output) Pronounced "my-mo," it is the use of multiple transmitters and receivers (multiple antennas) on wireless devices for improved performance. When two transmitters and two or more receivers are used, two simultaneous data streams can be sent, which double the data rate. Multiple receivers alone allow greater distances between devices. For example, the IEEE 802.11n (Wi-Fi) wireless standard uses MIMO to increase speed to 100 Mbps and beyond, doubling at minimum the 802.11a and 11g rates. MIMO antennas are also used in WiMAX and LTE.

MIMO, MISO and SIMO
The M, S, I and O relate to the air, not the device. For example, multiple inputs (MI) means multiple transmitters send multiple data streams "into" the air. Multiple outputs (MO) means multiple receivers acquire multiple data streams "out of" the air (see illustration below). See 802.11n, antenna diversity, beamforming and HSPA.
ARCHITECTURE AND ADVANTAGES OFMULTIPLE ANTENNA TECHNOLOGIES                       Compared to Single                          Antenna (SISO)                          Technologies                          --------------      Transmit  Receive   DataType  Antennas  Antennas  Rate  Distance

 MIMO  Multiple  Multiple    >     >

 MISO  Multiple  Single      =     =

 SIMO  Single    Multiple    =     >

 M = Multiple   S = Single
 I = Input      O = Output



MIMO Wireless Router
In 2004, Belkin introduced the first 802.11n wireless router with multiple transmit/receive antennas (see 802.11n). (Image courtesy of Belkin Corporation, www.belkin.com)




MIMO Wireless Router
In 2004, Belkin introduced the first 802.11n wireless router with multiple transmit/receive antennas (see 802.11n). (Image courtesy of Belkin Corporation, www.belkin.com)
References in periodicals archive ?
Hsu, "WLAN MIMO antennas with a GPS antenna for smart watch applications," in 2017 International Workshop on Electromagnetics: Applications and Student Innovation Competition, pp.
Kim, "Near-optimal low-complexity antenna selection scheme for energy-efficient correlated distributed MIMO systems," AEU-International Journal of Electronics and Communications, vol.
Previously, the MIMO system is introduced to increase spectral efficiency by increasing degree of freedoms in space domain by multiple antennas.
We consider a MIMO radar with 6 antennas both on transmitting and receiving ends.
El presente articulo hace la revision de las tecnologias MIMO Masivo y MIMO de Dimensiones Completas, cada una en una seccion separada, luego de lo cual se tratan los trabajos sobre deteccion de senal, problematica que comparten ambas y en donde se enfoca el proyecto marco del cual se genera este articulo; se finaliza con las conclusiones.
- Global 5G and Massive MIMO Radio Shipments in Million Units for the Years 2018, 2020, 2022 and 2024
Generally, the microwave MIMO technology is applied to the distance less than 7km, but the innovation test reached 11.03km which is the longest microwave MIMO link in the industry.
The deployment of massive MIMO helps us meet our customers' evolving needs for the best experience even while using multiple bandwidth-hungry applications.
Massive MIMO, invented by Nokia Bell Labs, will be on display with the live 5G NR connection demonstration.
This is an ideal environment for testing and deploying Massive MIMO. This trial helps in evaluating the benefits of the technology and determines optimal deployment scenarios.
In this paper, massive MIMO system with DP transmit-array called DP massive MIMO system is proposed to install twice as many transmit-antennas in the same space as SP massive MIMO system.
has announced at Mobile World Congress that Sprint has purchased 5G-ready massive MIMO solutions from Samsung, which includes deployment of Samsung's latest MIMO technology solutions on Sprint's 2.5GHz TDD-LTE network, the company said.