Method for adjusting adaptation control of adaptive interference canceller

摘要

The present invention describes a method for temporal adjustment of adaptation control of an adaptive interference canceller (AIC) based on spatially weighted beamforming pre-processing. Most importantly, the present invention enhances the spatial blocking performance, while generating noise references for the AIC by a beamformer, by introducing dynamic adjustment to the AIC filter adaptation control. As a result, adaptation is effectively realized in two dimensions-spatial and temporal. The criterion for adjusting the AIC filter adaptation control is applied continuously following generation of the noise references. Essential in the invention is the comparison of the short-time powers or levels of the noise reference signals and desired signal beams and allowing the adaptation of the AIC filter under consideration only when the noise reference signal power is large enough in comparison with the desired signal power.