Signal detector employing correlation analysis of non-uniform and disjoint sample segments
First Claim
1. A wireless communication device, comprising at least one component including at least one transceiver supporting voice communication, a Global Positioning System (GPS) receiver, and at least one signal processor, the components producing position information of the device by receiving a control signal that is generated in response to at least one event, controlling at least one of receipt and processing of at least one signal in response to a state of the control signal, performing correlation analyses of multiple segments of the received signal from separate and distinct periods of time, generating cumulative correlation data by combining selected results of the correlation analyses, and maintaining at least one parameter of the at least one received signal across a time period of the at least one event using the cumulative correlation data.
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Abstract
A wireless communication device (e.g., a cellular telephone) includes one transceiver for voice or data communication and a global positioning system (GPS) receiver a signal for receiving a GPS signal from the GPS satellites. The GPS receiver does not receive the GPS signal when the transceiver is transmitting, so that the GPS signal receives may consist of multiple signal segments of various duration and various delays. A method is provided which combine correlations of these multiple signal segments cumulatively until a sufficiently signal-to-noise ratio is achieved to allow detection of the transmitted signal of one or more of the GPS satellites.
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Citations
26 Claims
- 1. A wireless communication device, comprising at least one component including at least one transceiver supporting voice communication, a Global Positioning System (GPS) receiver, and at least one signal processor, the components producing position information of the device by receiving a control signal that is generated in response to at least one event, controlling at least one of receipt and processing of at least one signal in response to a state of the control signal, performing correlation analyses of multiple segments of the received signal from separate and distinct periods of time, generating cumulative correlation data by combining selected results of the correlation analyses, and maintaining at least one parameter of the at least one received signal across a time period of the at least one event using the cumulative correlation data.
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10. A communication system, comprising:
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means for receiving a control signal that is generated in response to at least one event; means for controlling at least one of receipt and processing of at least one signal in response to a state of the control signal; means for performing correlation analyses of multiple segments of the received signal from separate and distinct periods of time; means for generating cumulative correlation data by combining selected results of the correlation analyses; and means for maintaining at least one parameter of the at least one received signal across a time period of the at least one event using the cumulative correlation data. - View Dependent Claims (11, 12, 13, 14)
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15. A method for at least one of detecting and tracking signals, comprising:
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receiving a control signal that is generated in response to at least one event; controlling at least one of receipt and processing of at least one signal in response to a state of the control signal; performing correlation analyses of multiple segments of the received signal from separate and distinct periods of time; generating cumulative correlation data by combining selected results of the correlation analyses; and maintaining at least one parameter of the at least one received signal across a time period of the at least one event using the cumulative correlation data. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23, 24)
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25. A cellular telephone, comprising:
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a voice communications system; a Global Positioning System (GPS) receiver that receives GPS signals; and at least one signal processing system coupled among the voice communications system and the GPS receiver, the signal processing system configured to perform at least one of detecting and tracking GPS signals, wherein at least one of the GPS receiver and the signal processing system receive and process the GPS signals in response to a state of a control signal that is generated in response to at least one event, wherein the signal processing system correlates multiple segments of the GPS signals from separate and distinct periods of time, generates cumulative correlation data by combining selected results of the correlations, and maintains at least one parameter of the GPS signals across a time period of the at least one event using the cumulative correlation data.
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26. Computer readable media including instructions which, when executed in a processing system, perform at least one of detecting and tracking signals, by:
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receiving a control signal that is generated in response to at least one event; controlling at least one of receipt and processing of at least one signal in response to a state of the control signal; performing correlation analyses of multiple segments of the received signal from separate and distinct periods of time; generating cumulative correlation data by combining selected results of the correlation analyses; and maintaining at least one parameter of the at least one received signal across a time period of the at least one event using the cumulative correlation data.
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Specification