An apparatus configured to operate using carrier aggregation in a mobile wireless communication system, the apparatus comprising: a first N-path filter configured with at least a first passband centered around a central frequency, wherein the first N-path filter is coupled to a radio frequency input port configured to provide at least a first carrier aggregation signal, a second carrier aggregation signal, and an interfering signal, wherein a first part of the interfering signal is positioned between the first carrier aggregation signal and the second carrier aggregation signal, the first N-path filter configured to suppress or attenuate the first carrier aggregation signal, the second carrier aggregation signal, and the interfering signal outside of its first passband so that the first part of the interfering signal remains, and the first N-path filter outputting a first output of the first N-path filter; a second N-path filter configured with at least a second passband centered around said central frequency, wherein the second N-path filter is coupled to the radio frequency input port configured to provide the at least first carrier aggregation signal, the second carrier aggregation signal, and the interfering signal, the second N-path filter configured to suppress or attenuate the interfering signal outside of its second passband so that the first carrier aggregation signal, the second carrier aggregation signal and the first part of the interfering signal remain, and the second N-path filter outputting a second output of the second N-path filter; and a combiner configured to subtract the first output of the first N-path filter from the second output of the second N-path filter to remove the interfering signal and to yield the first carrier aggregation signal and the second carrier aggregation signal, wherein a combiner output includes the first carrier aggregation signal and the second carrier aggregation signal, wherein the first carrier aggregation signal comprises a primary cell carrier, wherein the second carrier aggregation signal comprises a secondary cell carrier, and wherein the first and second carrier aggregation signals (102, 104) are non-contiguous in a radio frequency spectrum of the first and second carrier aggregation signals (102, 104). a first N-path filter configured with at least a first passband centered around a central frequency, wherein the first N-path filter is coupled to a radio frequency input port configured to provide at least a first carrier aggregation signal, a second carrier aggregation signal, and an interfering signal, wherein a first part of the interfering signal is positioned between the first carrier aggregation signal and the second carrier aggregation signal, the first N-path filter configured to suppress or attenuate the first carrier aggregation signal, the second carrier aggregation signal, and the interfering signal outside of its first passband so that the first part of the interfering signal remains, and the first N-path filter outputting a first output of the first N-path filter; a second N-path filter configured with at least a second passband centered around said central frequency, wherein the second N-path filter is coupled to the radio frequency input port configured to provide the at least first carrier aggregation signal, the second carrier aggregation signal, and the interfering signal, the second N-path filter configured to suppress or attenuate the interfering signal outside of its second passband so that the first carrier aggregation signal, the second carrier aggregation signal and the first part of the interfering signal remain, and the second N-path filter outputting a second output of the second N-path filter; and a combiner configured to subtract the first output of the first N-path filter from the second output of the second N-path filter to remove the interfering signal and to yield the first carrier aggregation signal and the second carrier aggregation signal, wherein a combiner output includes the first carrier aggregation signal and the second carrier aggregation signal, wherein the first carrier aggregation signal comprises a primary cell carrier, wherein the second carrier aggregation signal comprises a secondary cell carrier, and wherein the first and second carrier aggregation signals (102, 104) are non-contiguous in a radio frequency spectrum of the first and second carrier aggregation signals (102, 104).