Spur reduction circuit and apparatus, radio transceiver, mobile terminal, method and computer program for spur reduction

摘要

Examples provide a spur reduction circuit and a spur reduction apparatus, a radio transceiver, a mobile terminal, a method and a computer program for spur reduction. The spur reduction circuit (10) is configured to reduce spur interference in a baseband radio signal, d(n), n indexing samples and comprises at least one input (12) for the baseband radio signal, d(n), and information on at least one spur frequency, ω(n). The spur reduction circuit further comprises an adaptive filter (14) configured to filter the baseband radio signal, d(n), to obtain a baseband radio signal with reduced spur interference, e(n). The adaptive filter (14) is further configured to filter the baseband radio signal, d(n), based on at least one filter coefficient, w(n), and based on the information on the at least one spur frequency, ω(n). The spur reduction circuit (10) further comprises an update module (16) configured to adapt the at least one filter coefficient, w(n), based on the baseband radio signal with reduced spur interference e(n). The spur reduction circuit (10) further comprises at least one output (18) for the baseband signal with reduced spur interference e(n).