F

FACCH - Fast Associated Control Channel

( similar to the SDCCH but used in parallel for operation of the TCH. If the data rate of the SACCH is insufficient borrowing mode is used)

FB - Frequency Correction Burst; used for frequency synchronisation of the mobile

FCC - Federal Communications Commission; the US regulatory body for telecommunications

FCCH - Frequency Correction Channel (also Frenquency Control Channel) 

FDD - Frequency Division Duplex 

FDMA - Frequency Division Multiple Access
(a transmission technique where the assigned frequency band for a network is divided into sub-bands which are allocated to a subscriber for the duration of their calls)

FEC - Forward Error Correction

FH - Frequency Hopping

FH-CDMA - Frequency Hopping CDMA

FMC - Fixed Mobile Convergence

FMI - Fixed Mobile Integration

FPLMTS - Future Public Land Mobile Telecommunications System
(the original title of the ITU’s third generation concept now known as IMT-2000)

FRA - Fixed Radio Access; see WLL

FSDPSK - Filtered Symmetric Differential Phase Shift Keying

FSK - Frequency Shift Keying 
( a method of using frequency modulation to send digital information)

FSOQ - Frequency Shift Offset Quadrature Modulation

FSS - Fixed Satellite ServiceGb
(The interface between the PCU and the SGSN in a GSM/GPRS network)

FOMA - Freedom Of Mobile multimedia Access
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