DYNAMIC SWITCHING IN RADIO RECEIVERS

A digital radio receiver comprises a configurable filter, a configurable re-sampler and a configurable mixer, and operates in accordance with a predetermined radio communication protocol which defines a first type of data packet that, when transmitted, occupies a first range of frequencies, and a second type of data packet that, when transmitted, occupies a second range of frequencies, the first range being wider than the second range. The filter, re-sampler and mixer process data packets of both the first and second type. By default, the filter attenuates frequencies that fall outside of the first range. When the receiver receives a data packet transmitted by a remote device it determines whether the data packet is of the second type and, if so, it configures the filter to attenuate frequencies that fall outside of the second range, and configures the re-sampler and mixer in dependence on the determination.