Diversity reception of nonorthogonal multipulse signals in multiuser Nakagami fading channels

In this letter we consider the problem of multiantenna reception of nonorth ogonal multipulse signals in a multiuser system operating over a flat-flat Nakagami fading channel, wherein each user sends an M-ary information symbo l by transmitting one out of M available waveforms, The receiver first-stag e is a decorrelative filter, which gets rid of the MAI, and whose output is then properly processed in order to decode the information symbols from th e user of interest. In particular, we derive both the optimum noncoherent a nd the GLRT detectors, and show that the latter receiver, not only is simpl er to implement, but also achieves a performance level very similar to that of the former receiver.