Joint Multipath Delay Tracking and Interference Cancellation in DS-CDMA Systems Using Successive ICA for Oversaturated Data

Abstract

A recent idea is to use blind source separation (BSS) methods within successive interference cancellation (SIC) in DS-CDMA reception. This has been found to results in an interference cancellation solution, that is able to i) mitigate different kinds of interference sources (e.g. multi-access, multi-path and out-of-cell interferences) simultaneously, ii) tackle "more sources than observations"-problem and, consequently, operate in highly loaded systems and iii) deal with imperfect channel estimation better than conventional BSS receiver and conventional interference cancellation. Thus far however, a single path channel has been assumed in studies behind these findings. In this paper we extend our previous studies to multipath channels where inter-path interference hardens the joint delay tracking and interference cancellation problem even more.