RECOMMENDATION ITU-R P.1238-3 - Propagation data and prediction methods for the planning ... 1 Introduction 2 Propagation impairments and measures of quality in indoor radio systems 3 Path loss models 3.1 Site-general models 3.2 Site-specific models 4 Delay spread models 4.1 Multipath 4.2 Impulse response 4.3 r.m.s. delay spread 4.4 Statistical models 4.5 Site-specific models 5 Effect of polarization and antenna radiation pattern 5.1 Line-of-sight case 5.2 Obstructed path case 5.3 Orientation of mobile terminal 6 Effect of transmitter and receiver siting 7 Effect of building materials, furnishings and furniture 8 Effect of movement of objects in the room