Development of parallel type multi-stage interference canceller for W-CDMA

This paper describes a developed W-CDMA base station testbed with a practical multi-stage interference canceller, which is processed by high-speed digital signal processing cards. The multi-stage canceller features a parallel structure with a cancellation control factor, which can make the parallel cancelling operation stable. A laboratory experiment demonstrates that the developed interference canceller has a high cancelling capability and near-far resistance even when the interference (2 users) power is 9 dB higher than the desired user. The development and experiment proves that this multistage canceller is feasible and effective technology for W-CDMA performance enhancement.