A modified blind adaptive multiuser CDMA detector

We propose a modified blind adaptive multiuser detector. It is designed to surmount the problems that the blind adaptive detector of Honig, Madhow and Verdu (see IEEE Trans. Inform. Theory, vol.41, no.4, p.944-60, 1995) has in the multipath scenario. It needs to know the spreading code and timings of the significant multipath signals of the desired user, but is actually a "blinder" detector because it can still work when our timing knowledge is not accurate. Its performance in the case of wrong timing can be restored through signal subspace projection, assuming the estimation of the signal subspace using the received signal.