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Understanding of SISO, SIMO, MISO and MIMO (note that the terms input and output refer to the radio channel carrying the signal, not to the devices having antennas) In radio , multiple-input and multiple-output , or MIMO (commonly pronounced my-moh or me-moh), is the use of multiple antennas at both the transmitter and receiver to improve communication performance. It is one of several forms of smart antenna technology.
MIMO
The 3rd Generation Partnership Project ( 3GPP ) is a collaboration between groups of telecommunications associations, known as the Organizational Partners. The initial scope of 3GPP was to make a globally applicable third-generation ( 3G ) mobile phone system specification based on evolved Global System for Mobile Communications (GSM) specifications within the scope of the International Mobile Telecommunications-2000 project of the International Telecommunication Union (ITU). The scope was later enlarged [ 1 ] to include the development and maintenance of: the Global System for Mobile Communications (GSM) including GSM evolved radio access technologies (e.g.
3GPP
4G
In telecommunications , 4G is the fourth generation of mobile phone mobile communication technology standards. It is a successor of the third generation (3G) standards. A 4G system provides mobile ultra-broadband Internet access, for example to laptops with USB wireless modems , to smartphones , and to other mobile devices. Conceivable applications include amended mobile web access, IP telephony , gaming services, high-definition mobile TV , video conferencing, 3D television and Cloud Computing .
Michael Falco for The New York Times Joe Mangrum, a sidewalk artist in Manhattan, with a device attached to his iPhone to scan credit cards and take donations. Several of the companies have developed small credit card scanners that plug into a cellphone and for a small fee enable any individual or small business to turn a phone into a credit card processing terminal. PayPal’s cellphone app calls for only a simple bump of two cellphones to transfer money. has submitted a patent application for a cellphone payment system. Brian Kusler, 40, a software engineer, is already helping dollar bills join coins as collector’s items. After he polished off grilled lamb and zinfandel at a San Francisco restaurant recently, his dining companion paid the bill and asked him for his share.
Cellphone Payments Offer Alternative to Cash
