A Robust Technique for Blind Multiuser CDMA Detection in Fading Channels
This paper considers the blind multiuser reception problem for Direct Sequence Code Division Multiple Access (DS-CDMA) systems. A hybrid approach to the blind reception of linear Multiple-Input Multiple-Output (MIMO) channels is taken up. The authors consider the problem of blind detection of multiuser CDMA signals in a space time scenario. The channel is assumed to have a small scale flat fading behaviour. A two step adaptive reception method used. The receiver has the knowledge of only the spreading code of interest. The Higher Order Statistical (HOS) technique known as Independent Component Analysis (ICA) is employed for the signal separation. The performance of this technique in the small scale flat fading space time scenario with different types of user signature codes is analyzed through various simulations.