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 ?
As the Silicon Valley became the start-up hub for the US, India is building its own start-up cities such as Bangalore which houses some of the prominent start-up companies such as Mymo Wireless and Tejas Networks.
This week Standard Bank introduces a R4.95p/m bank account called MyMo that customers can open on their mobile devices, loaded with data and airtime offerings and other benefits such as virtual and Gold physical card.
(12) iako micolay {cum fratribus} netrzilma thefzelnicze mymo...
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.
It prompted the UK's first mobile phone specially designed for children - the MyMo - to be withdrawn from sale by its distributor.
The MyMo phone was aimed at four to eight-year-olds to use in an emergency.
The MyMo phone went on sale five months ago aimed at four to eight-year-olds to use in an emergency.
The MyMo went on sale five months ago aimed at four to eight- year-olds to use in emergencies.