Telefonaktiebolaget LM Ericsson (publ)
Altering filtering by changing mixing frequency when interferer present

Abstract:

A filtering arrangement for a wireless communication receiver is disclosed. The filtering arrangement comprises an input port configured to receive a digital signal, wherein the digital signal has a signal bandwidth and comprises a desired signal, dividing circuitry configured to divide the digital signal into two or more signal parts, wherein the two or more signal parts comprise two edge signal parts, and a respective processing branch associated with each of the two or more signal parts. A processing branch configured to process a respective edge signal part comprises a digital edge filter configured to filter the edge signal part, determination circuitry configured to determine whether an un-desired signal is comprised in the edge signal part, and frequency shifting circuitry configured to frequency shift the edge signal part responsive to determination by the determination circuitry. Corresponding wireless communication receiver, filtering method and computer program product are also disclosed.