NOISE SUPPRESSION IN A MOBILE COMMUNICATIONS SYSTEM

摘要

A method and apparatus are disclosed for suppressing bumblebee noise in a mobile communications system, whereby a digital processor (18) associated with a speech coder (17) in a mobile phone (16) receives the incoming stream of speech samples and performs a Fast Fourier Transform on the incoming sample stream. A priori knowledge about where in the frequency spectrum the bumblebee noise occurs is advantageously used to determine just which frequency samples in the Fast Fourier Transform the bumblebee noise has enhanced. The noise at these frequencies is then suppressed (110) by, for example, interpolating between two neighboring frequency samples to suppress the noise in the samples therebetween.