Space-time Multiuser Detection in Multipath Cdma Channels

The problem of multiuser detection in multipath CDMA channels with receiver antenna array is considered. The optimal space-time multiuser receiver structure is rst outlined, followed by linear space-time multiuser detection methods based on iterative interference cancellation. Singleuser-based space-time processing methods are also considered and are compared with the multiuser approach. It is seen that the proposed multiuser space-time processing techniques o er substantial performance gains over the singleuser-based methods, especially in a near-far situation.