Low-power narrow and wide band receiver system
First Claim
1. 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.
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Accused Products
Abstract
A communications device and receiver system and method to efficiently distribute functions among radio frequency (RF), analog front end (AFE) and baseband modules for ultra-low power consumption comprising a wideband receiver subsystem selectively coupled to a signal input receiving a first frequency band, a narrowband received subsystem selectively coupled to the signal input receiving a second frequency band and, a controller configured to monitor the first frequency band using the first receiver subsystem and if a wake up 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 transmitting the wake up signal, the wake up signal including channel selection information defining the channel for subsequent communications. Wherein, the two frequency bands overlap and center on different frequencies.
30 Citations
20 Claims
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1. A receiver, comprising:
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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. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A method, comprising:
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receiving signals transmitted on a first frequency band centered on a first frequency using a first receiver subsystem coupled to a signal input, the first frequency band comprising a plurality of channels; receiving signals transmitted on a second frequency band centered on a second frequency using a second receiver subsystem coupled to the signal input and configured to be tuned to the second frequency band, the second frequency band 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; monitoring the first frequency band using the first receiver subsystem; connecting the second receiver subsystem to the signal input if a wakeup signal is detected using the first receiver subsystem, the wakeup signal transmitting channel selection information defining a channel for subsequent communications; and tuning the second receiver subsystem to the channel transmitted in the wakeup signal. - View Dependent Claims (8, 9, 10, 11, 12, 13)
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14. A receiver, comprising:
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a signal input; a first receiver subsystem coupled to the signal input and configured to receive signals transmitted on a first frequency band; a second receiver subsystem coupled to the signal input and configured to receive signals transmitted on a second frequency band; wherein the second frequency band is narrower than and overlapped by the first frequency band; 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; wherein the first frequency band comprises a plurality of channels and the second frequency band comprises one of the plurality of channels; the second radio subsystem is configured to be selectively tuned to the one of the plurality of channels; the wakeup signal includes channel selection information defining a channel for subsequent communications; and the controller is configured to tune the second receiver subsystem to the channel transmitted in the wakeup signal. - View Dependent Claims (15, 16, 17, 18, 19, 20)
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Specification