7Background

7 Background

(1) The 2.3 GHz band has been allocated for spectrum licensing. Spectrum licensed, apparatus licensed and class licensed radiocommunications transmitters communicate with radiocommunications receivers in and adjacent to the 2.3 GHz band. These receivers may suffer interference from unwanted emissions, blocking and intermodulation caused by a radiocommunications transmitter operated under a 2.3 GHz spectrum licence. (2) This instrument has been made to provide guidance on the management of interference from radiocommunications transmitters operated under a 2.3 GHz spectrum licence to radiocommunications receivers operating in the following circumstances: (a) point to point fixed services operating on frequencies below the 2.3 GHz band (Part 3); (b) space research service, space operations service and earth exploration-satellite service receivers operating in the 2200 MHz to 2300 MHz band (Part 4); (c) mobile services operating on frequencies below the 2.3 GHz band (Part 5); (d) television outside broadcast services operated in accordance with the Radiocommunications (Television Outside Broadcasting) (2010-2110 MHz and 2200-2300 MHz) Frequency Band Plan 2022 and the Radiocommunications (Mobile-Satellite Service) (1980–2010 MHz and 2170–2200 MHz) Frequency Band Plan 2022 (Part 6); (e) radiocommunications receivers tuned to radiocommunications transmitter operating under the LIPD class licence in the 2300 MHz to 2483.5 MHz frequency band (Part 7). (3) This instrument also provides advice regarding: (a) protection of radio astronomy services operating on a fortuitous basis (Part 8); and (b) managing interference across the geographic boundaries of 2.3 GHz spectrum licences (Part 9). (4) As radio waves propagate in different ways because of factors such as frequency, terrain, atmospheric conditions and topography, there are a number of ways to predict path loss. The ITU-R Recommendation P.1144 “Guide to the application of the propagation methods of Radiocommunication Study Group 3” provides a guide on the application of various propagation methods developed by the Radiocommunication Sector of the International Telecommunication Union. It advises on the most appropriate methods for particular applications, as well as the limits, required input information and output for each of these methods. The most recent version of propagation models developed by the Radiocommunication Sector of the International Telecommunication Union should be considered when modelling propagation in the 2.3 GHz band.

Note 1: ITU-R Recommendation P.1144 is available, free of charge, from the International Telecommunication Union’s website at www.itu.int.

Note 2: The use of other published propagation models applicable to the 2.3 GHz band may also be suitable.