| FACCH |
Fast Associated Control Channel |
|
| fast packet switching |
|
An emerging, packet-orientated, digital technology that differs from traditional packet switching in a number of ways. The most obvious is that it transmits all data in a single packet format whether the information is video, voice or data. Fast packet switching uses short, fixed length packets (cells) and - via hardware switching - is capable of speeds between 100,000 and 1,000,000 packets/second. |
| FCC |
Federal Communications Commission |
Regulatory body governing communications technologies in the US. established by the Communications Act of 1934, as amended, and regulates interstate communications (wire, radio, telephone, telegraph and telecommunications) originating in the United States. |
| FCCH |
Frequency Correction Channel |
|
| FDD |
Frequency Division Duplex |
Radio technology using a paired spectrum. Used in cellular communication systems such as GSM. |
| FDMA |
Frequency Division Multiple Access |
Method of allowing multiple users to share the radio frequency spectrum by assigning each active user an individual frequency channel. In this practice, users are dynamically allocated a group of frequencies so that the apparent availability is greater than the number of channels. |
| FEC |
Forward Error Correction |
An encoding technique that allows a limited number of errors in digital stream to be corrected based on knowledge of the encoding scheme used. |
| FER |
Frame Erasure/Error Rate |
A measure of the number of frames of data that contained errors and could not be processed. FER is usually expressed as a percentage or exponent. |
| FH |
Frequency Hopping |
|
| FHMA |
Frequency Hopped Multiple Access |
|
| FHSS |
Frequency Hopped Spread Spectrum |
A spectrum spreading technique using an RF carrier hopped across a large number of RF channels using a random or pseudorandom code to determine the sequence of channels used. |
| FIR |
Finite Impulse Response |
|
| fixed wireless |
|
Fixed wireless refers to over-the-air transmission of information to and
from systems and end-user equipment that are stationary, rather than mobile.
Operators of fixed wireless networks potentially can offer broadband services
without having to lay expensive cable systems or deal with the complexities
of mobility management. |
| FM |
Frequency Modulation |
|
| forward channel |
|
A channel used by the base station to communicate with a mobile station. |
| framing |
|
A technique used in digital communications systems for organizing the transmitted data into regular patterns so that the various logical channels in the data stream can be detected and processed. |
| frequency reuse |
|
A technique of reusing frequencies and channels within a communications system to improve capacity and spectral efficiency. Frequency reuse generally utilizes regular reuse patterns. |
| frequency selective fading |
|
A type of signal fading occurring over a small group of frequencies caused by a strong multipath component at those frequencies. |
| FSK |
Frequency Shift Keying |
A form of modulation using multiple carrier frequencies to carry the digital information. The most common is the two frequency FSK system using the two frequencies to carry the binary ones and zeros. |
| full rate |
|
The term commonly applied to voice codecs in a communications system. Most frame formats are designed to accommodate full and half-rate channels, with the intention of implementing half-rate coding as the technology permits to double the capacity of the system. The full-rate codec uses all of the time-slots available. |
