Advanced modelling of wireless digital transmission: From scalars to vectors

It is shown how a conventional digital transmission model with one transmit ter and one receiver can be generalised to a scenario with many transmitter s and many receivers. Vector signals are taken instead of scalar ones with the vector components representing different users and/or subchannels of a multiuser/multisubchannel transmission system. The core of the description is a sequence of matrices P(k). k is the discrete-time symbol interval vari able. The entries in R(k) reflect intersymbol interference as well as inter user and/or intersubchannel interference. it is demonstrated that vector de tection - or multiuser detection - of any kind can be taken to cope with th ose various types of interference, independent of the special linear transm ission and multiplexing or multiple access method leading to P(k). CDMA, OF DM and MC-CDMA are taken as examples.