Comparison of indoor propagation channel characteristics at 893 MHz and 37.2 GHz

This paper reports on experimental results obtained for narrowband and wideband indoor radio channels at 893 MHz and 37.2 GHz, respectively. Under the same line-of-sight (LOS) conditions the multipath channel characteristics for both frequency bands are compared in terms of distance-power law gradients and cumulative distribution functions (CDF) of the CW measurement data, and root-mean-square (RMS) delay spreads of the impulse response measurements. The results show the effect of the carrier frequency on the multipath phenomenon, either by sustaining the signal power level leading to a propagation loss less than that of the free space, or by increasing the RMS delay spread which limits the channel capacity.