Adaptive Delay Synchronisation and Reception in DS-CDMA Communications Systems

In this paper a new H type delay synchronisation and tracking approach is presented. It is based on the_ partitioning of the PN-code matrix of the CDMA users in order to form a linear combiner. This linear combiner may be used to find the noise subspace in order to synchronise the receiver code signal with the transmitted signal. The problem is reformulated as a state-space model and an H solution provides delay-_ tracking even in the presence of modelling errors such as over and underestimation of the number of signals present. The proposed novel formulation and approach provide a powerful near-far resistant solution for synchronisation and reception of DS-CDMA signals in a multiuser environment.