Interference Cancellation in CDMA Systems Using Multiple Receive Antennas

A multiple receive antenna (MRA) system is studied for code division multiple access (CDMA) using pseudo-random spreading codes. The core component, the receiver, jointly processes the multiple antenna array signals, despreading and error control code metric generation. Interference from joint users is cancelled by the projection method, where the signals are projected away from the interfering signal space. This method requires knowledge of the array response vectors, which is acquired via blind subspace estimation techniques. It is shown that the increase in system capacity is linear to the number of receive antennas. Performance analysis and simulation results are given to substantiate these ndings.