Doppler aided inertial navigation
DCFirst Claim
Patent Images
1. A system for determining the speed of a mobile device in a multipath environment, comprising:
- a receiver associated with the mobile device configured to intercept at least one radio frequency emission traveling along a plurality of reflected paths from an emitter to the receiver;
a narrowband signal detector configured to employ a spectral compression technique that includes a non-linear operation to transform the at least one intercepted radio frequency emission into Doppler frequency observables;
a signal processor configured to employ Doppler broadening detection to determine the speed of the mobile device based on the Doppler frequency observables.
5 Assignments
Litigations
0 Petitions
Reexamination
Accused Products
Abstract
Doppler Aided Inertial Navigation (DAIN) facilitates the determination of position, velocity and direction of mobile devices operating in highly obstructed GPS/GNSS environments. Delivering high precision, high resolution positioning information using signals of opportunity, the present invention measures the Doppler shift of a moving device using a variety of signals combined with inertial accelerometers and environmental sensors to deliver an autonomous positioning and navigation capability that does not require external infrastructure or a priori knowledge of signal sources.
12 Citations
9 Claims
-
1. A system for determining the speed of a mobile device in a multipath environment, comprising:
-
a receiver associated with the mobile device configured to intercept at least one radio frequency emission traveling along a plurality of reflected paths from an emitter to the receiver; a narrowband signal detector configured to employ a spectral compression technique that includes a non-linear operation to transform the at least one intercepted radio frequency emission into Doppler frequency observables; a signal processor configured to employ Doppler broadening detection to determine the speed of the mobile device based on the Doppler frequency observables. - View Dependent Claims (2, 3, 4)
-
-
5. A method for determining the speed of a mobile device in a multipath environment, comprising
intercepting at least one radio frequency emission traveling along a plurality of reflected paths from an emitter to a receiver associated with the mobile device; -
processing the at least one radio frequency emission with spectral compression that includes a non-linear operation to produce narrowband radio frequency data comprising Doppler frequency observables; and applying Doppler broadening detection on the narrowband radio frequency data comprising the Doppler frequency observables to determine the speed of the mobile device. - View Dependent Claims (6, 7, 8, 9)
-
Specification