Time variation characteristics of wireless broadband channel in urban area

Temporal variations of iBurst wireless broadband signal at 1.9 GHz and of digital TV signal at 570 MHz measured for one week on the fifth floor of a residential building in an urban area and on the ground floor in a suburban area is reported. While an apparent correlation between the signal variation and the local wind speed was observed in the suburban site, no such correlation was found in the urban site. The investigated urban wireless broadband channels show characteristics of LoS paths, with relatively smaller temporal signal variation, and of multipath environment, with a small scale local fading. Larger signal variation was found with a shorter link (1.2 km) than with a longer link (4.4 to 11.8 km) in the urban environment.