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
This "Pre-N" wireless router from Belkin uses two transmitters and three receivers to provide 108 Mbps between its access point and Belkin Pre-N cards in laptops. Introduced in 2004, this was the first "Preliminary-802.11n" system on the market (see 802.11n). (Image courtesy of Belkin Corporation, www.belkin.com)




MIMO Wireless Router
This "Pre-N" wireless router from Belkin uses two transmitters and three receivers to provide 108 Mbps between its access point and Belkin Pre-N cards in laptops. Introduced in 2004, this was the first "Preliminary-802.11n" system on the market (see 802.11n). (Image courtesy of Belkin Corporation, www.belkin.com)
References in periodicals archive ?
Tupelo, a health and wellness tech firm, based in Dubai has recently introduced an electronic device branded Mymo in Indian market to track fitness level of its users.
Leading brands and fashion companies set to showcase their latest collections at this year's FashionSZshow include Marisfrolg, Yinger Fashion Group, MYMO, BBLLUUEE, EITIE, OMNIALUO, VERSINO, LIZZY, NAERSI, and sefon.
When he took 10 1/2 -month-old Olivia Mymo on his knee, her face clouded over.
Other key events during his tenure include rolling out current technology such as mobile banking and MyMo, the credit union's newest online account aggregation and budgeting tools and remote-deposit capture for business accounts.
Novell is to offer five integrated modules: Business Service Manager; myCMDB; Business Experiences Manager; Business Service Level Manager and myMO Executive Dashboard.
There is no way I am going to give in as I'm sure the warnings given last month about the MyMo phones aimed at the four to eight year olds must have some validity.
Last week another firm, Communic8, withdrew its MyMo handset - a small pendant-style mobile for children aged four to eight - because of the health fears.
The MyMo went on sale five months ago aimed at four to eight- year-olds to use in emergencies.
The MyMo phone went on sale five months ago aimed at four to eight-year-olds to use in an emergency.
The MyMo phone was aimed at four to eight-year-olds to use in an emergency.
It prompted the UK's first mobile phone specially designed for children - the MyMo - to be withdrawn from sale by its distributor.
Novell myMO Executive Dashboard - for easy and intuitive role-based visualization