RMS delay spread vs. mean-square path gain for characterization of channel capacity

Abstract

In this paper, new channel parameters to characterize the capacity of single-input single-output (SISO) frequency-selective wireless channels are proposed, and the results of an indoor measurement campaign conducted at 2.38 GHz with a bandwidth of 20 MHz are reported. Using the Taylor series expansion of the channel capacity, the mean path gain that quantifies the average power gain of the channel and the normalized mean-square path gain that quantifies the frequency selectivity of the channel are derived. The experimental results verify that the proposed parameters better characterize the capacity than the root mean-square (RMS) delay spread that has been mostly used to parameterize wireless channels.