This disclosure is directed toward a wireless device configured to support
a plurality of wireless protocols. More specifically, the wireless device
includes signal processing components that can be used in more than one
communication mode. Accordingly, distinct components conventionally used
in a wireless device that supports a plurality of protocols may be
eliminated in favor of one or more common components that can be used in
the different communication modes. In one example, an analog filter is
used to filter baseband signals associated with a first protocol and a
second protocol. A digital filter can then be used to perform additional
filtering on digital baseband signals associated with the second
protocol. By using a common analog filter for analog filtering of
baseband signals associated with different protocols, the architecture
and design of a wireless device can be simplified.