Method for filtering a radio signal to prepare for an EDGE signal calculates signal-to-noise ratios to detect neighboring channel interference during filtering prior to producing a desired signal.

摘要

Signal-to-noise ratios are calculated to detect neighboring channel interference in accordance with a first specification. A filter module fits in an existing station behind an existing receiving filter (F1). In first filtering step (F2) a previous filtering effect is reduced to the smallest amount possible before new filtering (F3) is carried out to produce a desired signal. Independent claims are also included for an adaptive filter for carrying out the method of the present invention and for a supplementary filter for a communications system device for carrying out the method of the present invention.