SSH EN 300 748 V1.1.2:1997

Transmetimi Dixhital Video (DVB); Sistemet e Shpërndarjes Video në Shumëpika (MVDS) në 10 GHz dhe më lart

Digital Video Broadcasting (DVB); Multipoint Video Distribution Systems (MVDS) at 10 GHz and above

Scope

The present document describes the modulation and channel coding system (denoted the "System" for the purposes of the
present document) for the distribution of digital multi-programme Television (TV) / High Definition Television (HDTV) by
Multipoint Video Distribution Systems (MVDS) in the 40 GHz band. The System described in the present document is
based on that described in EN 300 421 for 11/12 GHz satellite services (see annex E, bibliography).
It allows the same consumer Integrated Receiver Decoder (IRD) to be used for either service, when used with a Low Noise
Block (LNB) down-converter for the appropriate frequency band.
The frequency band 40,5 to 42,5 GHz has been harmonized within the European Conference of Post and
Telecommunications Administrations (CEPT) under Recommendation T/R 52-01.
The System however, is applicable to other frequency bands above 10 GHz.
The System uses Quaternary Phase Shift Keying (QPSK) modulation and concatenated error protection strategy based on a
convolutional code and shortened Reed-Solomon (RS) code.
The System is suitable for use on different MVDS transmitter bandwidths.
Compatibility with Moving Pictures Experts Group - 2 (MPEG-2) coded TV services (see ISO/IEC 13818-1 [1]),
with a transmission structure synchronous with the packet multiplex, is provided.
Exploitation of the multiplex flexibility allows the use of the transmission capacity for a variety of TV service
configurations, including sound and data services.
All service components are Time Division Multiplexed (TDM) on a single digital carrier.
The present document:
- gives a general description of the System for MVDS digital TV transmission;
- specifies the digitally modulated signal in order to allow compatibility between pieces of equipment developed by
different manufacturers. This is achieved by describing in detail the signal processing principles at the modulator
side, while the processing at the receive side is left open to different implementation solutions. However, it is
necessary in the present document to refer to certain aspects of reception;
- identifies the global performance requirements and features of the System, in order to meet the service quality
targets.