CONTENTS

RECOMMENDATION  ITU-R  P.1406-1     2
Propagation effects relating to terrestrial land mobile and broadcasting services in the VHF and UHF bands     2
Scope     2
Annex 1     2
2 Attenuation due to land cover 2
 3     Signal strength variability  3
        3.1     General 3
        3.2 Fading regimes  3
                  3.2.1 Shadowing  3
                  3.2.2 Multipath fading  4
       3.3 Local reflections  5
       3.4 Signal correlation  5
4 Delay spread  5
        4.1 Impact on system performance  6
        4.2 Delayed signals due to local scatterers  6
        4.3 Delayed signals due to large distant scatterers  6
5 Antenna effects  8
        5.1 Polarization effects  8
                  5.1.1 Depolarization phenomena in the land mobile environment 8
                  5.1.2 Polarization diversity  8
        5.2 Height gain: base and mobile  8
        5.3 Correlation/space diversity  9
        5.4 Realisable vehicular mobile antenna gain  9
6 Portable effects  9
        6.1 Building entry loss  9
        6.2 Body loss  10
 7     Guided propagation  11
        7.1 Propagation in tunnels  11
        7.2 Leaky feeders  12
 8     Temporal variations  12