Method of receiving and receivers

A method of receiving data transmitted via a combination of a plurality of radio frequency signals using carrier aggregation, the method comprising:

• processing at least said plurality of radio frequency signals using a local oscillator, each radio frequency signal occupying a respective band of a plurality of radio frequency bands, the plurality of radio frequency bands being arranged in two groups, a first group and a second group, separated in frequency by a first frequency region, each of the groups including one or more radio frequency bands and the first group occupying a wider frequency region than the second group;
• and
• setting said local oscillator, during said processing, to a frequency that is offset from the centre of a band defined by outer edges of the frequency regions occupied by the two groups,
• wherein the frequency to which the local oscillator is set is within one quarter of the bandwidth of one of the plurality of radio frequency bands from a frequency mid-way between the centre of the frequency region occupied by the first group and the centre of the frequency region occupied by the second group.