ETSI EN 301 786:2001 Fixed Radio Systems; Point-to-Point Equipment; Parameters for Digital Radio Systems for the Transmission of Digital Signals Operating at 52 GHz (V1.2.1)
ETSI - European Telecommunications Standards Institute
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ETSI EN 301 786:2001
Scope
The present document specifies the minimum performance parameters for terrestrial digital fixed service radio communications equipments operating in the 52 GHz frequency band and provides for the following: ? introduction of unique system type codes for regulatory reference to the various system types detailed in the present document@ refer to new annex C (normative) and related categories of equipment classes of spectral efficiency; ? payload capacities for spectrum efficiency classes 1 to 4; ? digital services operating in frequency division duplex (FDD) operation only; ? specific antenna radiation patterns as defined in EN 300 833 [11]). As harmonized channel spacings lower than 14 MHz are not defined in the 52 GHz frequency band at the drafting date of the present document@ channel spacings at 7 MHz and 3@5 MHz are shown for information purposes only. However the present document can be considered as a guideline when national frequency plans based on 7 MHz and 3@5 MHz channel spacings exist. Digital systems are intended to be used for point-to-point connections in local and regional networks at data rates between 2 Mbit/s and Synchronous Transport Module@ level 1 (STM-1) Digital systems considered in the present document will be able to meet the error performance objectives of the ITU-R national portion of the reference path@ i.e. ITU-R Recommendation F.1189 [18] and the error performance objectives detailed in ITU-T Recommendation G.826 [25]. The parameters to be specified fall into two categories: a) those that are required to provide compatibility between channels from different sources of equipment on the same route@ connected to separate antennas; b) parameters defining the transmission quality of the proposed system. The present document deals with Radio Frequency (RF) and baseband characteristics relevant to low@ medium and high capacity Plesiochronous Digital Hierarchy (PDH) transmission systems@ and STM-0 and STM-1 Synchronous Digital Hierarchy (SDH) transmission systems. Antenna/feeder system requirements are covered in EN 300 833 [11]. The present document does not contain aspects related to test procedures and test conditions however they are to be found in EN 301 126-1 [3]. As the maximum transmission rate in a given bandwidth depends on system spectral efficiency@ different equipment classes are defined: Class 1: equipment spectral efficiency based on typically 2-states modulation scheme (e.g. 2-FSK@ Gaussian Minimum Shift Keying (GMSK) with discriminator detection@ or equivalent); Class 2: equipment spectral efficiency based on typically 4-states modulation scheme (e.g. 4-FSK@ 4-QAM@ or equivalent); Class 3: equipment spectral efficiency based on typically 8-states modulation scheme (e.g. 8PSK@ or equivalent); Class 4: equipment spectral efficiency based on typically 16 or 32-states modulation scheme (e.g. 16-QAM@ 32-QAM@ or equivalent). The above classes are indicative only and do not imply any constraint to the actual modulation format@ provided that all the requirements in the present document are met. Safety aspects are not considered in the present document. However compliance to CENELEC EN 60950 [33] will be required to comply with the 99/5 EC Directive (RTTE). Technical background for most of the parameters and requirements referred in the present document may be found in TR 101 036-1 [13]
ETSI EN 301 786:2001 history
2001ETSI EN 301 786:2001 Fixed Radio Systems; Point-to-Point Equipment; Parameters for Digital Radio Systems for the Transmission of Digital Signals Operating at 52 GHz (V1.2.1)
2000ETSI EN 301 786:2000 Fixed Radio Systems; Point-to-Point Equipment; Parameters for Digital Radio Systems for the Transmission of Digital Signals Operating at 52 GHz (V1.1.1)