The problem of multiuser detection in multipath CDMA channels with receiver antenna array is considered. The optimal space-time multiuser receiver structure is first derived, followed by linear space-time multiuser detection methods based on iterative interference cancellation. Blind adaptive space-time multiuser detection techniques are then proposed, which require prior knowledge of only the spreading waveform and the timing of the desired user's signal. Single-user-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 offer substantial performance gains over the single-user-based methods, especially in a near-far situation.
|Original language||English (US)|
|Number of pages||19|
|Journal||IEEE Transactions on Signal Processing|
|State||Published - 1999|
All Science Journal Classification (ASJC) codes
- Signal Processing
- Electrical and Electronic Engineering