en 50 and 80%, Table 4.7-14, although they cannot be ignored for modelling amplitude and phase forced 100 specular components to be estimated, despite variations. The authors found no fundamental frequency the high temporal resolution [HaTK05]. dependence over the three measurement bands. Medbo, Berg, and Harrysson specifically measured and Static channels modelled temporal variations in a NLoS WLAN scenario The influence of moving scatterers on the channel, as without receiver movement [MeBH04]. Overnight, for compared to moving a receiving antenna, was investigated 15 hours, measurements were taken at 5.25 GHz in by Kattenbach and Früchting [KaFr01]. To this end, they 200 MHz bandwidth with a VNA on a 5 S time sweep. The made measurements at three different frequencies, at variations seen are believed to be caused by persons CHAPTER 4.7 Propagation modelling and channel characterisation moving in the vicinity of the antennas at either end. The for the rooftop-positioned RX than for the TX at street terminal was placed in a room next to a corridor, the BS/ level. The clustering of multipath components in the access point in the corridor. They characterised the azimuth-delay plane was evident, both for RX and TX, but measured transfer variations by a deviation parameter p: no cluster parameters were extracted [SKPC04]. Skentos the total power, as function of time interval, in the de- et al. also investigated links from rooftop to rooftop as viation from the mean measured transfer spectrum, the a typical fixed wireless access scenario. In this case, dis- mean determined over intervals of 1000 S, i.e. 100 sub- persion was found to be very slow, the maximum Doppler sequent measurements. The total received power itself shift reported was 0.63 Hz, at 5.2 GHz carrier frequency showed to be very constant over the 15-hour period. [SkCK05]. Without persons around during night time, p was of the Another experiment under static conditions was order of -50 dB relative to the total received power; conducted by Marques et al. 