Fixed Radio Systems - Point-to-point equipment - Low and medium capacity point-to-point digital radio systems operating in the frequency range 2,1 GHz to 2,6 GHz
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Разработчик:
Зарубежные/ON
ICS:
33.060.30 Radio relay and fixed satellite communications systems / Радиорелейные и стационарные спутниковые системы связи
Описание
The present document specifies the minimum performance parameters for terrestrial low and medium capacity Point-to-Point (P-P) digital fixed service radio relay equipment operating in the range 2,1 to 2,6 GHz. The requirements and limits given in the present document are relevant to all environmental conditions for the chosen climatic class. Test methods are under study. Digital systems are intended to be used for P-P connections in local and regional networks at data rates of N × 64 kbit/s, N × 2 Mbit/s (N = 1, 2, 4, 8, 16), 2 × 8 Mbit/s and 34 Mbit/s. Other data rates may also be foreseen. Typical applications include: a) customer connections; b) Integrated Services Digital Network (ISDN) extension; c) mobile base station connections; d) telemetry and telecontrol, including transportable and off-shore use; e) digital TV application. 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 either to: - separate antennas; or - separate polarizations of the same antenna; b) parameters defining the transmission quality of the proposed system. The present document deals with Intermediate Frequency (IF), Radio Frequency (RF) and baseband characteristics relevant to low and medium capacity Plesiochronous Digital Hierarchy (PDH) transmission. Antenna/feeder system requirements are covered in EN 300 631 [8]. Due to the wide spread of applications and corresponding system rates, parameters such as RF spectrum masks and receiver sensitivity are related to standardized channel spacings rather than to minimum system rates. This allows individual countries to allocate a bandwidth and therefore a standard channel spacing in accordance with the foreseen services and their own frequency management and radio network planning. As the maximum bit rate in a given bandwidth depend (...abbreviated)