RECEIVED SIGNAL LEVEL CHARACTERISTICS FOR RADIO CHANNELS UP TO 30 MHZBANDWIDTH IN LINE-OF-SIGHT MICROCELLS

Many efforts are currently underway to design wideband mobile communic ation systems. In this letter, we clarify the received signal level ch aracteristics for wideband mobile radio channels in line-of-sight (LOS ) microcells. We conduct several urban-area field experiments to measu re the received signal levels for various receiver bandwidths from 300 kHz to 30 MHz and the power delay profile. The experimental results s how that the fading depth of the received signal decreases as the norm alized rms delay spread, defined as the product of receiver bandwidth and rms delay spread, increases. These results are useful in designing wideband microcell systems for urban areas.