Receiver with battery saver
First Claim
1. A method for saving battery energy in a radio, having a receiver for receiving a carrier signal to produce a recovered signal, comprising the steps of:
- decoding a non-valid coded squelch signal in said recovered signal;
synchronizing said receiver with said decoded non-valid coded squelch signal;
placing said portable radio in a sleep mode;
periodically waking up in sync with the non-valid coded squelch signal and rapidly detecting when the same non-valid coded squelch signal is present; and
returning to the sleep mode in response to the detecting of the non-valid coded squelch signal.
1 Assignment
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Accused Products
Abstract
A receiver 100 used for recovering modulation signals modulated on a carrier signal is disclosed. The receiver 100 includes a detector 204 and a decoder 206 for detecting the presence of a non-valid coded squelch signal and decoding such signal in the recovered modulation signal. The receiver 100 further includes a synchronizer 208 for synchronizing the detected non-valid coded signal. Receiver 100 is placed in a battery saver mode when a non-valid coded squelch signal is detected. The battery saver mode includes monitoring the recovered modulation signal for a change in the non-valid coded squelch signal. The battery saver mode is departed once a change in the non-valid coded squelch signal is detected.
88 Citations
12 Claims
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1. A method for saving battery energy in a radio, having a receiver for receiving a carrier signal to produce a recovered signal, comprising the steps of:
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decoding a non-valid coded squelch signal in said recovered signal; synchronizing said receiver with said decoded non-valid coded squelch signal; placing said portable radio in a sleep mode; periodically waking up in sync with the non-valid coded squelch signal and rapidly detecting when the same non-valid coded squelch signal is present; and returning to the sleep mode in response to the detecting of the non-valid coded squelch signal. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A receiver, comprising:
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means for receiving a carrier signal to produce a recovered signal; means for decoding the recovered signal to detect the presence of a recovered non-valid coded squelch signal; means for synchronizing said receiver with said non-valid coded squelch signal, and means for placing said receiver in a battery saver mode responsive to said means for synchronizing. - View Dependent Claims (8, 9, 10, 11)
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12. A receiver comprising:
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means for receiving a signal having a non-valid coded squelch signal; means for decoding said non-valid coded squelch signal; means for synchronizing to said non-valid coded squelch signal; means for placing said receiver in a battery saver mode; means for periodically and synchronously monitoring the received signal to detect any change in the non-valid coded squelch signal; and means for departing the battery saver mode in response to the detection of change in the non-valid coded squelch signal.
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Specification