Abstract: Systems and methods are provided herein for implementing a hybrid communications network including both radar and radio communications devices. These systems and methods may advantageously include shared resource allocation protocols for automatically allocating communication resources for transmitting and/or receiving a signal using a device in the network based on one or more dimensions of separability for the signal selected from time-division, frequency-division, spatial-division and/or code-division multiplexing. Importantly, the resource allocation protocol may account for radar specific operational parameters of one or more radar devices in the network.

Abstract: Systems and methods are provided herein for implementing a hybrid communications network including both radar and radio communications devices. These systems and methods may advantageously include shared resource allocation protocols for automatically allocating communication resources for transmitting and/or receiving a signal using a device in the network based on one or more dimensions of separability for the signal selected from time-division, frequency-division, spatial-division and/or code-division multiplexing. Importantly, the resource allocation protocol may account for radar specific operational parameters of one or more radar devices in the network.

Abstract: A system for notifying a user of a hazard, the system comprising a warning processor operative to receive data associated with a probable region affected by the hazard, and send a message including the data associated with the probable region affected by the hazard to a user device.

Abstract: A method and apparatus for estimating the position of a mobile device in a multi-path environment. In one example, the method includes receiving a plurality of reference signals from a corresponding plurality of reference devices, for each reference signal, calculating expected time delay boundaries, for each reference signal, estimating a range between the device and the corresponding reference device based on a measured time delay of the reference signal falling within calculated time delay boundaries to produce a plurality of range estimates, and filtering the plurality of range estimates to generate a composite estimate of the position of the device.

Abstract: A method and apparatus for estimating the position of a mobile device in a multi-path environment. In one example, the method includes receiving a plurality of reference signals from a corresponding plurality of reference devices, for each reference signal, calculating expected time delay boundaries, for each reference signal, estimating a range between the device and the corresponding reference device based on a measured time delay of the reference signal falling within calculated time delay boundaries to produce a plurality of range estimates, and filtering the plurality of range estimates to generate a composite estimate of the position of the device.

Abstract: Methods including a Kalman filter tracking method for localizing a magnetic field source and which employs a linear perturbation method. The linear perturbation method linearizes an objective function in the neighborhood of the actual source enabling the source location to be computed in a single operation. Successive applications of the linear perturbation method lead to successive improvements in the localization result.

Abstract: A magnetic object tracking algorithm, that may be implemented as an apparatus or a method, that permits kinematic tracking of magnetized objects, or targets, using magnetic field strength measurements derived from one or more vector magnetometers. The magnetic object tracking algorithm effectively tracks a maneuvering magnetic dipole target using an extended Kalman filter directly observing (processing) real magnetic field strength data.

Abstract: A processing method that estimates the size and structural features of a magnetizable object or source from readings provided by an array of magnetic sensors. Using the method, an array of magnetic sensors generates magnetic reading derived from the source that are processed by selecting candidate positions for the location of the source. The correlation B.sup.T B is maximized, where B=Rm and B is a vector of composite measurements from the array of magnetic sensors, R is a projection matrix from the location of the magnetic source to the sensors, B is an estimated vector of composite measurements representative of what the true magnetic readings should be for a source at an assumed location 16, and m is a dipole strength vector. The maximum correlation is chosen which is indicative of the location and magnitude of the source. Candidate arrangements of sets of dipoles 11a symmetrically arranged about the chosen location of the source are then selected.