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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.
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.
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.
Three times as many as Verizon, according to a consumer survey released Tuesday Click to enlarge. Source: ChangeWave Research