Common terms & acronyms used in wireless industry

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ICI- Intercerrier Interference -  Channel variations during an orthogonal frequency division multiplexing (OFDM) sequence caused by carrier frequency offsets, channel time variation, and sampling frequency offsets. ICI degrades the performance of OFDM transmissions.
iDAS - Indoor Distributed Antenna System -  DAS deployed in an indoor setting
IFBW - Intermediate Frequency Bandwidth -  The bandwidth of the frequency that a carrier wave shifts to as an intermediate step in transmission or reception.
IFF - Indirect Far Field -  A test method approved by 3GPP to overcome path loss and excessive far-field distance involved in 5G cellular communications.
IMEI - International Mobile Equipment Identity -  A number that uniquely identifies 3GPP mobile devices. Used by the telecommunications network to identify valid devices in case of loss or theft.
IMSI - International Mobile Subscriber Identity -  A unique number that identifies the subscriber identification module (SIM) card present in the device belonging to a subscriber.
IMT-2020 – International Mobile Telecommunications-2020 -  A standard that sets the requirements for 5G networks, devices, and services. IMT-2020 was developed by the International Telecommunications Union (ITU) Radiocommunication Sector in 2015. The ITU is a United Nations agency responsible for information and communications technologies.
ISI - Intersymbol Interference -  Signal distortion caused when one or more symbols interfere with other symbols. Caused by amplitude and phase dispersion in the channel due to multipath propagation or non-linear frequency response.
ITU - International Telecommunication Union -  A United Nations agency responsible for information and communications technologies. The ITU — formerly called the International Telegraph Union — is the oldest global international organization, established in 1865. The ITU created the standard that sets forth the requirements for 5G networks, devices, and services known as IMT-2020.




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