Battery economizing in a communications system
First Claim
Patent Images
1. A battery-powered radio, comprising:
- a receiver circuit, the receiver circuit operable to produce a received signal from a channel;
a received signal strength indicator circuit coupled to the receiver circuit, the received signal strength indicator circuit operable to produce an output indicating an amount of power in the channel;
a demodulator circuit coupled to the receiver circuit, the demodulator operable to produce a demodulated signal from the received signal;
a signal quality indicator coupled to the demodulator circuit;
a decoder circuit coupled to the demodulator circuit; and
a microprocessor coupled to the receiver, the received signal strength indicator circuit, the signal quality indicator circuit and the decoder circuit;
wherein the microprocessor is operable to energize and de-energize the receiver circuit;
determine the presence of a carrier with a carrier detect false rate, based, at least in part, on the power of the channel, and to determine an acceptable signal quality with a signal quality false rate, based, at least in part, on an output of the signal quality indicator circuit;
wherein the microprocessor is operable to energize the receiver circuit for a first period of time, and, if the carrier is determined to be present, to then maintain the receiver in the energized state until a determination is made as to whether acceptable signal quality has been obtained, and to de-energise the receiver substantially immediately without waiting for expiration of any time period if the carrier is determined to be present and the signal quality is not acceptable.
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Accused Products
Abstract
In communications systems such as telemetry systems in which a receiver (34) is periodically energised to receive transmissions from a central station, the receiver includes a power control means (12) for controlling the energisation of the receiver, a circuit (48) for detecting the presence of a carrier, which circuit (48) causes the power control means to de-energise the receiver (34) in the event of carrier not being detected, and a signal quality measuring stage (50) for determining if the demodulated signal is decodable, the stage (50) causing the power control means to de-energise the receiver (34) in the event of the signal quality not being acceptable.
17 Citations
3 Claims
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1. A battery-powered radio, comprising:
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a receiver circuit, the receiver circuit operable to produce a received signal from a channel; a received signal strength indicator circuit coupled to the receiver circuit, the received signal strength indicator circuit operable to produce an output indicating an amount of power in the channel; a demodulator circuit coupled to the receiver circuit, the demodulator operable to produce a demodulated signal from the received signal; a signal quality indicator coupled to the demodulator circuit; a decoder circuit coupled to the demodulator circuit; and a microprocessor coupled to the receiver, the received signal strength indicator circuit, the signal quality indicator circuit and the decoder circuit; wherein the microprocessor is operable to energize and de-energize the receiver circuit;
determine the presence of a carrier with a carrier detect false rate, based, at least in part, on the power of the channel, and to determine an acceptable signal quality with a signal quality false rate, based, at least in part, on an output of the signal quality indicator circuit;wherein the microprocessor is operable to energize the receiver circuit for a first period of time, and, if the carrier is determined to be present, to then maintain the receiver in the energized state until a determination is made as to whether acceptable signal quality has been obtained, and to de-energise the receiver substantially immediately without waiting for expiration of any time period if the carrier is determined to be present and the signal quality is not acceptable. - View Dependent Claims (2, 3)
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Specification
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Current AssigneeUniloc 2017 LLC (SoftBank Group Corp.)
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Original AssigneeKoninklijke Philips Electronics N.V. (Koninklijke Philips N.V.)
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InventorsRoberts, David K., Marshall, Paul R., Burbidge, Richard C.
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Primary Examiner(s)Urban, Edward F.
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Assistant Examiner(s)CHOW, CHARLES CHIANG
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Application NumberUS09/653,782Time in Patent Office2,384 DaysField of Search455/574, 455/343, 455/421, 455132-134, 4552261-2264, 455/575, 455/550, 455/127, 4553431-3436, 455/423, 455/572, 455/135.1, 455/2, 455/561, 4554565-4566, 455/575.1, 455/550.1, 455/67.11, 455/127.1, 455/277.2, 4551153-1154, 455/21, 455/573, 379/93.2, 379 58- 61, 379/22, 379/24, 379/27, 340/825.44, 340/825.47, 340/825.48, 340/311.1, 340/825.49, 340/825.36, 370/311, 370/322, 375/346, 375/326, 375/222US Class Current455/574CPC Class CodesH04L 1/0045 Arrangements at the receive...H04W 52/0229 where the received signal i...H04W 52/0241 where no transmission is re...H04W 52/0245 according to signal strengthY02D 30/70 in wireless communication n...
