Method and apparatus for enhanced pedestrian navigation based on WLAN and MEMS sensors
First Claim
1. A method for enhanced Microelectromechanical (MEMS)-based navigation in a mobile device, comprising:
- receiving navigation data from one or more MEMS-based navigation sensors on board the mobile device;
calculating, using a processing device coupled to the one or more MEMS-based navigation sensors, position, velocity, and attitude (PVA) values in response to the navigation data using an Inertial Navigation System (INS) mechanization;
calculating, using the processing device, Pedestrian Dead Reckoning (PDR) values in response to the navigation data received from the one or more MEMS-based navigation sensors;
calculating ranges between one or more Wireless Local Area Network (WLAN) access points and the mobile device or a WLAN position solution for the mobile device; and
determining, using the processing device, one or more navigation values in response to a combination of the PVA values calculated by the INS mechanization and the PDR values, in combination with at least one of the WLAN range or WLAN position solution;
wherein the one or more navigation values calculated in response to the combination of PVA values, PDR values and the WLAN range or the WLAN position solution are more accurate than a navigation value calculated in response to any one of the PVA values, PDR values, WLAN range or WLAN position solution alone.
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Abstract
Methods, systems and apparatuses for enhanced Microelectromechanical (MEMS)-based navigation in a mobile device are disclosed. In an embodiment, a method includes receiving navigation data from one or more navigation sensors on board the mobile device. The method may also include calculating, using a processing device, position, velocity, and attitude (PVA) values in response to the navigation data using an Inertial Navigation System (INS) mechanization. Additionally, the method may include calculating, using the processing device, Pedestrian Dead Reckoning (PDR) values in response to the navigation data. Also, the method may include determining, using the processing device, one or more navigation values in response to a combination of the PVA values calculated by the INS mechanization and the PDR values.
27 Citations
18 Claims
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1. A method for enhanced Microelectromechanical (MEMS)-based navigation in a mobile device, comprising:
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receiving navigation data from one or more MEMS-based navigation sensors on board the mobile device; calculating, using a processing device coupled to the one or more MEMS-based navigation sensors, position, velocity, and attitude (PVA) values in response to the navigation data using an Inertial Navigation System (INS) mechanization; calculating, using the processing device, Pedestrian Dead Reckoning (PDR) values in response to the navigation data received from the one or more MEMS-based navigation sensors; calculating ranges between one or more Wireless Local Area Network (WLAN) access points and the mobile device or a WLAN position solution for the mobile device; and determining, using the processing device, one or more navigation values in response to a combination of the PVA values calculated by the INS mechanization and the PDR values, in combination with at least one of the WLAN range or WLAN position solution; wherein the one or more navigation values calculated in response to the combination of PVA values, PDR values and the WLAN range or the WLAN position solution are more accurate than a navigation value calculated in response to any one of the PVA values, PDR values, WLAN range or WLAN position solution alone. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A system for enhanced Microelectromechanical (MEMS)-based navigation in a mobile device, comprising:
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one or more MEMS-based navigation sensors on board a mobile device configured to generate navigation data; a wireless local area network (WLAN) receiver configured to receive one or more WLAN signals; and a processing device coupled to the one or more MEMS-based navigation sensors and the WLAN receiver, the processing device configured to; calculate position, velocity, and attitude (PVA) values in response to the navigation data using an Inertial Navigation System (INS) mechanization; calculate Pedestrian Dead Reckoning (PDR) values in response to the navigation data generated by the one or more MEMS-based navigation sensors; calculate ranges between one or more WLAN access points and the mobile device or a WLAN position solution for the mobile device; and determine one or more navigation values in response to a combination of the PVA values calculated by the INS mechanization and the PDR values in combination with at least one of the WLAN range or WLAN position solution; wherein the one or more navigation values calculated in response to the combination of PVA values, PDR values and either the WLAN range or the WLAN position solution are more accurate than a navigation value calculated in response to any one of the PVA values, PDR values, WLAN range or WLAN position solution alone. - View Dependent Claims (8, 9, 10, 11, 12)
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13. An apparatus for enhanced Microelectromechanical (MEMS)-based navigation in a mobile device, comprising:
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an Inertial Navigation System (INS) mechanization, coupled to the one or more MEMS-based navigation sensors onboard the mobile device, and configured to calculate position, velocity, and attitude (PVA) values in response to navigation data received from one or more MEMS-based navigation sensors; a PDR processing element configured to calculate Pedestrian Dead Reckoning (PDR) values in response to the navigation data received from the one or more MEMS-based navigation sensors; a Wireless Local Area Network (WLAN) unit configured to calculate ranges between one or more WLAN access points and the mobile device or a WLAN position solution for the mobile device; and a navigation processing element configured to determine one or more navigation values in response to a combination of the PVA values calculated by the INS mechanization and the PDR values in combination with at least one of the WLAN range or WLAN position solution; wherein the one or more navigation values calculated in response to the combination of PVA values, PDR values and either the WLAN range or the WLAN position solution are more accurate than a navigation value calculated in response to any one of the PVA values, PDR values, WLAN range, or WLAN position solution alone. - View Dependent Claims (14, 15, 16, 17, 18)
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Specification