A constrained optimization approach to multiuser detection

Interference cancellation or multiuser detection schemes are of great interest to the CDMA community because of their potential ability to treat the near-far problem and significantly reduce interference levels. A linear adaptive multiuser detection scheme based on constrained optimization is presented, constraints are constructed from knowledge of users´ codes and associated timing. Both single- and multiple-constraint detectors are derived and shown to have interesting relationships to existing detectors. Simulation results, presented in the form of bit error rate curves, demonstrate the receiver´s performance in an additive white Gaussian noise (AWGN) channel