e two propagation models, the Average Power with a microstrip antenna, then a spatial scanning in front Delay Profile (APDP) is used. It includes field strength of the wall on a rectangular grid was carried out with the values, delays and angles of incidence of the electro- RX antenna (a microstrip antenna as well) SO as to con- magnetic waves impinging on the outer walls of the ve- figure a 10 X 10 element synthesised uniform rectangular hicle or building. The reason for the need for a transition array. The output of the virtual array was then stored and between the two propagation models is that for the processed with an ESPRIT superresolution technique in indoor or vehicle objects a smaller discretisation has to be order to identify each single scattered wave and to ex- used than for the urban scenario. Prediction results in tract the corresponding parameters. Results show that, terms of field intensity have been compared with beside the specular contribution, the wall generates Propagation modelling and channel characterisation CHAPTER 4.7 Power (dBm) -20.00 -25.00 -30.00 -35.00 -40.00 -45.00 -50.00 -55.00 -60.00 -65.00 -70.00 (a) Coverage in the neighbourhood (buildings in grey and base station marked with an arrow). Power (dBm) -20.00 -25.00 -30.00 -35.00 -40.00 -45.00 -50.00 -55.00 -60.00 -65.00 -70.00 (b) Coverage inside the car. Figure 4.7-14 Penetration into a car of field from a GSM BS. a multitude of scattered waves: many weak waves are of received clusters are scattered waves with DoAs cor- ascribed to 'brick roughness' and a few strong waves are responding to a variety of objects such as signboards, traffic observed coming from window metal frames. signs, lampposts, traffic lights and almost any metallic A similar investigation is carried out in [GhTI04] with object in the environment. Power considerations suggest the aim of identifying the dominant scatterers in a typical that in a dense urban area scattering from these objects urban microcellular environment. A series of measure- sums up to around