Forward Error Correction

A technique for improving the robustness of data transmission. Excess bits are included in the outgoing data stream so that error-correction algorithms can be applied upon reception. For the satellite standard the Viterbi code combined with the Reed Solomon code is used. Commercial use of transponders makes 3/4 the code rate most used for Viterbi, which means that three out of four bits contain useable information.


Geographic area covered by a satellite transmission.

Forward path

The transmission path issued from the service provider and reaching the end user.

Frequency spectrum

A range of frequencies.