METHODS AND DEVICES FOR IMPROVED POSITION DETERMINATION
First Claim
Patent Images
1. A method for determining the position of a GNSS receiver, comprising:
- a) from a GNSS receiver, at a monitoring rate, monitoring at least one GNSS satellite that is located above said horizon with respect to said GNSS receiver to identify a transition event where said GNSS receiver changes from;
i. LOS to NLOS—
having an unobstructed line of sight to at least one specific satellite of said at least one GNSS satellite to not having an unobstructed line of sight to said at least one specific satellite;
orii. NLOS to LOS—
not having an unobstructed line of sight to at least one specific satellite of said at least one GNSS satellite to having an unobstructed line of sight to said at least one specific satellite;
b) if a transition event is identified, identifying a portion of a presumed location area of said GNSS receiver that corresponds to a border of a shadow cast by an object that accounts for said transition event.
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Accused Products
Abstract
Disclosed are methods and devices that in some embodiments are useful in improving a position determination of a receiver of a global navigation satellite system.
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Citations
53 Claims
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1. A method for determining the position of a GNSS receiver, comprising:
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a) from a GNSS receiver, at a monitoring rate, monitoring at least one GNSS satellite that is located above said horizon with respect to said GNSS receiver to identify a transition event where said GNSS receiver changes from; i. LOS to NLOS—
having an unobstructed line of sight to at least one specific satellite of said at least one GNSS satellite to not having an unobstructed line of sight to said at least one specific satellite;
orii. NLOS to LOS—
not having an unobstructed line of sight to at least one specific satellite of said at least one GNSS satellite to having an unobstructed line of sight to said at least one specific satellite;b) if a transition event is identified, identifying a portion of a presumed location area of said GNSS receiver that corresponds to a border of a shadow cast by an object that accounts for said transition event. - View Dependent Claims (2, 3, 4, 5, 10, 12)
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6-9. -9. (canceled)
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11. (canceled)
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13-15. -15. (canceled)
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16. A device for calculating the position of a GNSS receiver, comprising:
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a) a transition monitoring module, configured to, at a monitoring rate, monitor signal characteristics received by a GNSS receiver from a GNSS satellite that is located above said horizon with respect to said GNSS receiver, and to identify a transition event where said signal characteristics indicate that said GNSS receiver changes from; i. LOS to NLOS—
having an unobstructed line of sight to said GNSS satellite to not having an unobstructed line of sight to said GNSS satellite;
orii. NLOS to LOS—
not having an unobstructed line of sight to said to said GNSS satellite to having an unobstructed line of sight to said GNSS satellite; andb) a location improver, configured to, upon said identification of a transition event; i. obtain a presumed location area of said GNSS receiver; ii. determine a portion of said presumed location area that corresponds to a border of a shadow cast by an object that accounts for said identified transition event; and iii. report said portion of said presumed location. - View Dependent Claims (17, 18, 19, 20, 24)
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21-23. -23. (canceled)
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25-30. -30. (canceled)
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31. A method for determining the position of a GNSS receiver, comprising:
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a) at a monitoring rate, monitoring at least two GNSS satellites that are located above said horizon with respect to a GNSS receiver to identify a Rapid Signal Attenuation (RSAT) event corresponding to said at least two GNSS satellites; b) using a three dimensional representation of a presumed location area of said GNSS receiver representative of at least one obstructing object in said presumed location area, computing a shadow cast by said at least one obstructing object with respect to said signal from each of said at least two satellites; c) measuring said a duration elapsed between said GNSS receiver passing a first shadow cast by said at least one obstructing object with respect to a signal from a first of said at least two GNSS satellites and a second shadow cast by said at least one obstructing object with respect to a signal from a second of said at least two GNSS satellites; d) computing a distance traversed by said GNSS receiver during said measured duration; and e) comparing said computed distance to distances identified in said three dimensional representation thereby to identify a lane in which said GNSS receiver is travelling. - View Dependent Claims (32, 33, 34, 35, 36, 37, 38, 39)
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40-42. -42. (canceled)
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43. A device for determining the position of a GNSS receiver, comprising:
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a) an RSAT monitoring module, configured to monitor at least two GNSS satellites that are located above said horizon with respect to a GNSS receiver to identify a Rapid Signal Attenuation (RSAT) event corresponding to said at least two GNSS satellites, at a monitoring rate; b) a shadow identifying module, configured to use a three dimensional representation of a presumed location area of said GNSS receiver representative of at least one obstructing object in said presumed location area to compute a shadow cast by said at least one obstructing object with respect to said signal from each of said at least two satellites; and c) a lane identifying module, configured to; i. measure a duration elapsed between said GNSS receiver passing a first shadow cast by said at least one obstructing object with respect to a signal from a first of said at least two GNSS satellites and a second shadow cast by said at least one obstructing object with respect to a signal from a second of said at least two GNSS satellites; ii. compute a distance traversed by said GNSS receiver during said measured duration; and iii. compare said computed distance to distances identified in said three dimensional representation thereby to identify a lane in which said GNSS receiver is travelling. - View Dependent Claims (44, 45, 46, 47, 48, 49, 50, 51, 52)
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53-55. -55. (canceled)
Specification