Artifact Paths Removal Algorithm for Ultra-wideband Channels

Abstract

Channel impulse responses (CIRs) are extracted from measured waveforms based on a deconvolution process. In the case of Ultrawideband (UWB) communications, CIRs are extracted from measured UWB waveforms using some deconvolution algorithms, where CLEAN deconvolution algorithm is a well-known procedure for this aspect. However, the extraction of UWB CIRs is mostly prone to errors that are shown as artifact paths in the extracted CIRs. These artifact paths are represented as multipath components within the CIRs. In order to obtain more accurate CIRs, the artifact paths need to be eliminated. In this work, an algorithm is developed to remove the generated artifact paths available within UWB CIRs due to CLEAN utilization. The artifact paths removal (APR) algorithm has been developed based on the elliptical modeling concept applied for wideband channels. Results show that the APR algorithm has successfully removed the artifact paths from UWB CIRs. Moreover, a slight enhancement of the received power has been seen due to the removal of these weaker paths.