Blind adaptive interference cancellation technology based on conjugate gradient algorithm
Xian‐Da Zhang · Journal of Tsinghua University(Science and Technology) · 2002
Blind adaptive interference cancellation technology is one key technology for direct spread code division multiple access (DS CDMA) systems for cancelling multiple access interference (MAI) in DS CDMA systems without knowing the system parameters or using the training sequences. A novel blind adaptive interference cancellation technology is proposed based on the conjugate gradient algorithm using the criterion of constrained minimum output energy (CMOE) and orthogonal projection technology. The convergence speed and tracking performance of our algorithm, least mean square (LMS) algorithm and recursive least square (RLS) algorithm are analyzed by numerical simulation.