The study was required to review the potential availability of UHF TV spectrum (digital dividend) for mobile / BWA services across Africa (in particular in South Africa) and to assess interference between Electronic Communications Networks (ECNs) and TV broadcasting systems in the UHF band. Guard-band / distance separation requirements were derived to bring interference between[…]
The study analysed the possibility of repairing holes caused by base station transmitters in digital TV coverage areas by deploying repeaters. The approach was based on co-locating a small TV ‘booster’ transmitter at any interfering base station. The aim was to increase the available TV signal in the area to an extent sufficient to protect[…]
The study was undertaken to investigate the scope for releasing digital dividend frequencies. High level analysis was undertaken of the impact of removing channels 61 – 69 on countries in the Middle East and Africa. The data on the proposed TV channel use was sourced from the ITU RRC 06 Planning Interface database, which contains details[…]
Together with LCC this study examined technical aspects of a number of possible options for the licensing liberalisation in the 900 and 1800 MHz bands. The study examined the spectrum requirements and specifically the current usage of the GSM spectrum by the three operators (Meteor, O2 Ireland and Vodafone Ireland) and the potential to support the[…]
For ComReg conducted a study on the spectrum requirements for a nationwide TETRA network for the Emergency Services. The study aimed at estimating the amount of spectrum that might be required to roll out a national TETRA network in the 380–400 MHz band providing coverage to 98% of the landmass of Ireland for hand-portable terminals[…]
The study examined the demand for 3.5GHz spectrum for Wireless Broadband Access (WBA) services and the potential impact on the existing Fixed Satellite Services (FSS) users of the spectrum in Singapore. The work included analysis of interference between WBA and FSS together with potential requirements for additional filtering in the satellite receivers and also guard[…]
Undertook a campaign to measure the wideband impulse response of the outdoor-to-indoor channel for the UK Space Agency. The work was undertaken in the context of global positioning system design. A sliding correlator channel sounder was designed and constructed, operating at a chip rate of 100 MHz and a carrier frequency of 2.4 GHz. Measurements[…]
Long term technical support has been provided for Eutelsat on various satellite coordination issues. These included: Extensive interference modelling involving non-geostationary and geostationary satellite networks proposed for Ku and Ka band frequencies. The implications of interference avoidance techniques were examined using in-house software tools. The analysis of the impact of modifications in ITU-R Recommendations (e.g.[…]