Method and device for generating a location signal
First Claim
1. A method for generating a location signal, the method comprising:
- receiving, from a reference device, at least one location signal control parameter that defines linear frequency slope characteristics for a location signal;
configuring a frequency generation unit (FGU) to generate a first current having a first magnitude and a first polarity that are based on the at least one location signal control parameter; and
for at least one iteration;
during a first time period that is set based on the at least one location signal control parameter, charging a capacitive element in the FGU with the first current to generate a first control signal;
coupling the first control signal to a voltage controlled oscillator (VCO) to generate a first part of the location signal having the defined linear frequency slope characteristics; and
transmitting the first part of the location signal;
wherein configuring the FGU comprising operating the FGU as an open loop while generating the location signal; and
wherein the at least one location signal control parameter is received over a narrowband channel and the location signal is transmitted over a wideband channel.
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Abstract
A frequency generation unit (FGU) in a communication device includes a voltage controlled oscillator (VCO), an adjustable filter having a capacitive element for wideband operation, a current source with variable gain, and chirp generation control circuitry (CGC) that is used to generate location signals. The FGU receives, from a reference device, at least one location signal control parameter that defines linear frequency slope characteristics for a location signal. The CGC configures, based on the at least one location signal control parameter, the gain and a polarity of the current source to generate a first current during a first time period for charging the capacitive element to generate a control signal that is coupled to the VCO to generate a first part of the location signal having the defined linear frequency slope characteristics, wherein the first part of the location signal is transmitted using a transceiver of the communication device.
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Citations
14 Claims
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1. A method for generating a location signal, the method comprising:
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receiving, from a reference device, at least one location signal control parameter that defines linear frequency slope characteristics for a location signal; configuring a frequency generation unit (FGU) to generate a first current having a first magnitude and a first polarity that are based on the at least one location signal control parameter; and for at least one iteration; during a first time period that is set based on the at least one location signal control parameter, charging a capacitive element in the FGU with the first current to generate a first control signal; coupling the first control signal to a voltage controlled oscillator (VCO) to generate a first part of the location signal having the defined linear frequency slope characteristics; and transmitting the first part of the location signal; wherein configuring the FGU comprising operating the FGU as an open loop while generating the location signal; and wherein the at least one location signal control parameter is received over a narrowband channel and the location signal is transmitted over a wideband channel. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A method for generating a location signal, the method comprising:
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receiving, from a reference device, at least one location signal control parameter that defines linear frequency slope characteristics for a calibrated location signal; setting, to a calibrated state, internal processing of a device that generates the calibrated location signal, wherein the calibrated state generates a calibrated time delay within the device, wherein the calibrated time delay comprises a steady state internal processing delay for the device; configuring a frequency generation unit (FGU) of the device to generate a first current having a first magnitude and a first polarity that are based on the at least one location signal control parameter; and for at least one iteration; during a first time period set based on the at least one location signal control parameter, charging a capacitive element in the FGU with the first current to generate a first control signal; coupling the first control signal to a voltage controlled oscillator (VCO) to generate a first part of the calibrated location signal having the defined linear frequency slope characteristics; transmitting the first part of the calibrated location signal; configuring the FGU to generate a second current having a second magnitude that is based on the at least one location signal control parameter, wherein the second current has an opposite polarity from the first polarity; and for at least one iteration; during a second time period set based on the at least one location signal control parameter, charging the capacitive element with the second current to generate a second control signal; coupling the second control signal to the VCO to generate a second part of the calibrated location signal having the defined linear frequency slope characteristics; transmitting the second part of the calibrated location signal directly following transmission of the first part of the calibrated location signal; wherein configuring the FGU comprising operating the FGU as an open loop while generating the location signal; and wherein the at least one location signal control parameter is received over a narrowband channel and the location signal is transmitted over a wideband channel.
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14. A device for generating a chirp signal, the device comprising:
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a transceiver for receiving, from a reference device, at least one chirp signal control parameter that defines linear frequency slope characteristics for a chirp signal; a frequency generation unit (FGU) coupled to the transceiver and comprising; a current source having variable gain, an adjustable filter with a capacitive element for wideband operation; a voltage controlled oscillator (VCO); and chirp generation control circuitry that configures, based on the at least one chirp control parameter, the gain and a polarity of the current source to generate a first current during a first time period for charging the capacitive element to generate a control signal that is coupled to the VCO to generate a first part of the chirp signal having the defined linear frequency slope characteristics, wherein the first part of the chirp signal is transmitted using the transceiver; wherein configuring the FGU comprising operating the FGU as an open loop while generating the chirp signal; and wherein the at least one chirp signal control parameter is received over a narrowband channel and the chirp signal is transmitted over a wideband channel.
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Specification