ÖNORM EN 301127 V 1.3.1

The present document specifies the minimum performance parameters for a high capacity digital radio-relay system operating in frequency bands with about 30 MHz channel spacing in the 4 GHz, 6L GHz, 7 GHz, 8L GHz, 13 GHz and 15 GHz bands. The channel capacity is 1 × STM-1 on each polarization that allows to transmit up to 2 × STM-1 signals at the same frequency by using both polarizations in co-channel dual polarized (CCDP) mode of operation with cross-polar interference canceller techniques (XPIC). The present document is also applicable to 1 × STM-1 systems operating only with co-polar arrangement of about 30 MHz for which the CCDP operation with XPIC is considered a non mandatory options; for those systems the clauses relevant to XPIC operation (i.e. co-channel "internal" interference) are not applicable. These systems are intended for local high capacity links (e.g. mobile infrastructure connections) where few channels may be used by different operators) and the crowded environment could require co-polar operation on adjacent channels. It has to be noted that STM-1 systems can be grouped in order to offer an SDH interface higher than STM-1. The area of application of these digital radio-relay systems is foreseen to be in regional and trunk networks forming part of an SDH-network including optical rings. Systems considered in the present document shall be able to respect ITU-R and ITU-T performance objectives. The systems considered shall operate in these networks having regard for existing hop length, which are considered to be normally up to about 30 km to 40 km for regional and about 60 km for trunk networks, respectively. Hop lengths greater than this latter length are used in special applications. The systems considered in the present document are intended to operate in the same network with existing, Alternate Polarization (AP), SDH and PDH systems reported in EN 300 234 [14] and in CEPT/ERC (...abbreviated)