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A local mean should be found for the chosen number of samples. Lee Criteria – In order to eliminate fast fading from measurements, minimum 36 samples should be taken over 40λ.In Vehicle, Receive equipment attached to roof mounted antenna Omni Antenna with Transmitter attached through feeder. Use Omni antenna with minimum vertical beamwidth of 12 degreesĭirectional antenna can be used but in postproccessing everything beyond 3dBm should be dismissed RF Signals Accurate Radiated Power setting, EiRP should be greater than 40dBm Long enough to ensure sufficient data is capturedĭuring CW survey allocated test frequency shouldn’t be use for other purposesĬheck restrictions on test frequency TX EIRP Good balance between measurements taken in LOS and NLOS situations Do not plan a route across a big water surface, if site is on the one side of the lake, do not drive other lake sideĭata in regions of terrain slope variationĪvoid large blocking objects as high building or long roof Sufficient measurement in all local clutter types ( >1000 )Īvoid street canyons, tunnels, elevated roads, cuttings etcĭo not plan a map along the roads with ground height above the transmitter antenna. Must account for expected interference propagation Must account for expected coverage propagation Nothing unusual, we are characterising the majority of the network not the minority 0 Rooftop sites are preferred in a case test transmitter has to be mounted
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Within geographic region of model Distribution for Site Selection Spread of site heights representative of networkHeight sites heights within modelled region 6 Less number of sites can be considered if modelled geographical area is fairly small. Make sure calibrated model corresponds well with the collected data – data is essential.Determine model parameters in accordance to realistic propagation effects existing within proposed regions.Characterise the topology with network limits – identification of operating range for each model.Globe (Phillipines) GSM900 – 3 modelsĬW Measurements and Model Calibration Process Propagation Model Requirements IdentificationĬW Survey Campaign Data Post Processing Data Data Validation Validation.ESAT Digifone (Ireland) – UMTS 3 models.3GIS (Sweden) – UMTS, 6 models Belgacom (Belgium) – GSM 900, 6 models Swisscom (Switzerland) – GSM 900/1800 and UMTS, 9 models Inventis (Switzerland) – GSM R, 3 models Vodafone (Malta) – GSM 900, 2 models Globul (Bulgaria) – GSM 900, GSM1800 Oniway (Portugal) – UMTS, 4 models Inquam (Portugal) – CDMA2000 Blu (Italy) – GSM 1800 Nortel (UK) – GSM 1800 Ericsson (UK) – GSM 1800 Dolphin (Belgium, Uk) – Tetra models KPN Base (Belgium) – GSM 900/1800, 8 Models, 4 for each