On wireless channel modelling: Extraction of channel from channel measurements

Abstract

Next generation systems are using directional antennas for indoor high data rate devices. This arises a need for measurement and modelling of directional channels. Indoor environments also introduce extreme multipath behaviour into the directional channel. Directional measurements raise the problem of complicated data sets with 2-D spatio-temporal information. In order to analyse these complex data sets, it is first imperative to make sure the data set actually represents the propagation channel and is not influenced by the measuring apparatus. In order to construct the propagation channel, we discuss a novel technique of eliminating such effects from the measured data set. The method involves solving sets of simultaneous equations in a three stage process. Firstly, the data is cleaned in the spatial domain, secondly in the in the time domain and Anally the channel parameters are extracted. The technique is verified on real and simulation data sets.