SSH EN 300 749 V1.1.2:1997

Transmetimi Dixhital Video (DVB); Sistemet e Shpërndarjes me Mikrovalë në Shumëpika (MMDS) nën 10 GHz

Digital Video Broadcasting (DVB); Microwave Multipoint Distribution Systems (MMDS) below 10 GHz

Scope

The present document describes the framing structure, channel coding and modulation (denoted "the System" for the
purposes of the present document) for a digital multi-program television distribution by Microwave Multipoint
Distribution Systems (MMDS) operating below 10 GHz.
The aim of the present document is to present a harmonized transmission standard for cable, satellite and MMDS, based
on the MPEG-2 System Layer ISO/IEC 13818-1 [1], with the addition of appropriate Forward Error Correction (FEC)
technique.
This System follows the modulation/channel coding system for digital multi-program television by cable EN 300 429
(see annex C, bibliography) and is based on Quadrature Amplitude Modulation (QAM) with 16, 32, and 64 constellation
points.
The System FEC is designed to improve Bit Error Ratio (BER) from 10-4 to a range, 10-10 to 10-11, ensuring
"Quasi Error Free" (QEF) operation with approximately one uncorrected error event per transmission hour.