# US 2018/0024249 A1 · Device and a method for extracting timing information from a radio signal > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2018/0024249 A1 - Document ID: US20180024249A1 - Status: Published application - Kind: A1 - Application number: 15/657,688 - Filed: 2017-07-24 - Published: 2018-01-25 - Earliest claimed: 2016-07-25 - Assignees: ADVA Optical Networking SE - Applicants: ADVA Optical Networking SE - Inventors: Kenneth HANN - Web page: https://patentgrep.com/patent/US20180024249A1 ## CPC - G01S 19/22: Multipath-related issues - G01S 19/428: {using multipath or indirect path propagation signals in position determination} - H01Q 9/045: {with particular feeding means (for circular polarisation H01Q9/0428)} - G01S 19/01: Satellite radio beacon positioning systems transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO - G01S 19/39: the satellite radio beacon positioning system transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO - G01S: RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES - H01Q: ANTENNAS, i.e. RADIO AERIALS (radiators or antennas for microwave heating H05B6/72) ## Abstract A device for producing timing information comprises equipment (101) that extracts first preliminary timing information from a first circular polarized component of a radio signal and second preliminary timing information from a second circular polarized component of the radio signal. The second circular polarized component has an opposite handedness and a time-delay with respect to the first circular polarized component. The device comprises a processing system (102) that produces the timing information based on the first preliminary timing information and/or the second preliminary timing information, and uses stored correction data for reducing the effect of the time-delay on the timing information when using the second preliminary timing information for producing the timing information. Thus, the timing information corresponds to the first preliminary timing information also when the timing information is produced based on the second preliminary timing information. ## Claims ### Claim 1 A device comprising: equipment for extracting first preliminary timing information from a first circular polarized component of a radio signal and for extracting second preliminary timing information from a second circular polarized component of the radio signal, the second circular polarized component of the radio signal having an opposite handedness and a time-delay with respect to the first circular polarized component of the radio signal, and a processing system for producing timing information based on at least one of the following: the first preliminary timing information and the second preliminary timing information, wherein the processing system is configured to use stored correction data based on one or more measured or estimated values of the time delay and being suitable for reducing an effect of the time-delay on the timing information when producing the timing information based on at least the second preliminary timing information. ### Claim 2 (depends on 1) A device according to claim 1, wherein the processing system is configured to measure the time-delay on the basis of the second preliminary timing information and the first preliminary timing information, and form and store the correction data based on the measured time-delay. ### Claim 3 (depends on 2) A device according to claim 2, wherein the processing system is configured to monitor a power level of the first circular polarized component of the radio signal, measure the time-delay when monitoring the power level, and store the correction data based on the measured time-delay at each time when the monitored power level exceeds power level corresponding to previously stored correction data. ### Claim 4 (depends on 2) A device according to claim 2, wherein the processing system is configured to compare the measured time-delay to a numerical range based on information entered by a user of the device and to prevent the measured time-delay from being used as a basis for the correction data in response to a situation in which the measured time-delay is outside the numerical range. ### Claim 5 (depends on 1) A device according to claim 1, wherein the processing system is configured to produce the timing information based on the second preliminary timing information and the stored correction data in response to a situation in which a power level of the second circular polarized component of the radio signal is greater than a power level of the first circular polarized component of the radio signal, and otherwise to produce the timing information based on the first preliminary timing information. ### Claim 6 (depends on 1) A device according to claim 1, wherein the equipment comprises a first circular polarized antenna, a first receiver connected to the first circular polarized antenna and for extracting the first preliminary timing information, a second circular polarized antenna, and a second receiver connected to the second circular polarized antenna and for extracting the second preliminary timing information. ### Claim 7 (depends on 6) A device according to claim 6, wherein: the first circular polarized antenna comprises a first micro-strip patch, a first micro-strip line connecting the first micro-strip patch to the first receiver, and a first ground plane a distance apart from and parallel with the first micro-strip patch, and the second circular polarized antenna comprises a second micro-strip patch, a second micro-strip line connecting the second micro-strip patch to the second receiver, and a second ground plane a distance apart from and parallel with the second micro-strip patch. ### Claim 8 (depends on 1) A device according to claim 1, wherein the equipment comprises an antenna for receiving the first and second circular polarized components of the radio signal, a hybrid circuit connected to the antenna, a first receiver connected to a first branch of the hybrid circuit and for extracting the first preliminary timing information, and a second receiver connected to a second branch of the hybrid circuit and for extracting the second preliminary timing information. ### Claim 9 (depends on 8) A device according to claim 8, wherein the antenna comprises a micro-strip patch, a first micro-strip line connecting the micro-strip patch to the hybrid circuit, a second micro-strip line connecting the micro-strip patch to the hybrid circuit, and a first ground plane a first distance apart from and parallel with the micro-strip patch. ### Claim 10 (depends on 9) A device according to claim 9, wherein the hybrid circuit comprises four micro-strip lines constituting a quadrangle whose first corner is connected to the first micro-strip line, second corner is connected to the second micro-strip line, third corner is connected to the first branch of the hybrid circuit, and the fourth corner is connected to the second branch of the hybrid circuit, the hybrid circuit further comprising a second ground plane a second distance apart from and parallel with the four micro-strip lines. ### Claim 11 (depends on 10) A device according to claim 10, wherein the second distance is smaller than the first distance. ### Claim 12 (depends on 1) A device according to claim 1, wherein the device is a satellite receiver module for extracting the timing information from a satellite radio signal, the first circular polarized component of the radio signal being a directly propagated component of the satellite radio signal and the second circular polarized component of the radio signal being a reflected component of the satellite radio signal. ### Claim 13 A method comprising: extracting first preliminary timing information from a first circular polarized component of a radio signal, extracting second preliminary timing information from a second circular polarized component of the radio signal, the second circular polarized component of the radio signal having an opposite handedness and time-delay with respect to the first circular polarized component of the radio signal, producing (303) timing information based on at least one of the following: the first preliminary timing information and the second preliminary timing information, and using stored correction data based on one or more measured or estimated values of the time delay and being suitable for reducing an effect of the time-delay on the timing information when producing the timing information based on at least the second preliminary timing information. ### Claim 14 (depends on 13) A method according to claim 13, wherein the method further comprises: measuring the time-delay on the basis of the second preliminary timing information and the first preliminary timing information, and forming and storing the correction data based on the measured time-delay. ### Claim 15 A non-volatile computer readable medium encoded with a computer program for controlling a device that comprises: equipment for extracting first preliminary timing information from a first circular polarized component of a radio signal and for extracting second preliminary timing information from a second circular polarized component of the radio signal, the second circular polarized component of the radio signal having an opposite handedness and a time-delay with respect to the first circular polarized component of the radio signal, and a programmable processing system, the computer program comprising computer executable instructions for controlling the programmable processing system to: produce timing information based on at least one of the following: the first preliminary timing information and the second preliminary timing information, and use stored correction data based on one or more measured or estimated values of the time delay and being suitable for reducing an effect of the time-delay on the timing information when producing the timing information based on at least the second preliminary timing information. ### Claim 16 (depends on 3) A device according to claim 3, wherein the processing system is configured to compare the measured time-delay to a numerical range based on information entered by a user of the device and to prevent the measured time-delay from being used as a basis for the correction data in response to a situation in which the measured time-delay is outside the numerical range. ### Claim 17 (depends on 1) A device according to claim 1, wherein the processing system is configured to produce the timing information based on the second preliminary timing information and the stored correction data in response to a situation in which a power level of the second circular polarized component of the radio signal is greater than a power level of the first circular polarized component of the radio signal, and otherwise to produce the timing information based on the first preliminary timing information. ### Claim 18 (depends on 2) A device according to claim 2, wherein the processing system is configured to produce the timing information based on the second preliminary timing information and the stored correction data in response to a situation in which a power level of the second circular polarized component of the radio signal is greater than a power level of the first circular polarized component of the radio signal, and otherwise to produce the timing information based on the first preliminary timing information. ### Claim 19 (depends on 3) A device according to claim 3, wherein the processing system is configured to produce the timing information based on the second preliminary timing information and the stored correction data in response to a situation in which a power level of the second circular polarized component of the radio signal is greater than a power level of the first circular polarized component of the radio signal, and otherwise to produce the timing information based on the first preliminary timing information. ### Claim 20 (depends on 4) A device according to claim 4, wherein the processing system is configured to produce the timing information based on the second preliminary timing information and the stored correction data in response to a situation in which a power level of the second circular polarized component of the radio signal is greater than a power level of the first circular polarized component of the radio signal, and otherwise to produce the timing information based on the first preliminary timing information.