Patent ID: 8761307

Claim:
A receiver, comprising: a signal input; a first receiver subsystem coupled to the signal input and configured to receive signals transmitted on a first frequency band centered on a first frequency and comprising a plurality of channels; a second receiver subsystem coupled to the signal input and configured to receive signals transmitted on a second frequency band centered on a second frequency and comprising one of the plurality of channels, wherein the second frequency band is narrower than and overlapped by the first frequency band and wherein the first frequency is different from the second frequency, and wherein the second receiver subsystem is configured to be selectively tuned to the one of the plurality of channels; and a controller configured to: monitor the first frequency band using the first receiver subsystem; and if a wakeup signal is detected using the first receiver subsystem, connect the second receiver subsystem to the signal input and tune the second receiver subsystem to a channel transmitted in the wakeup signal, the wakeup signal including channel selection information defining the channel for subsequent communications.