A method and device determines an evolving position of a device using electromagnetic interference, which is jamming electromagnetic navigation signals. An antenna arrangement receives both the electromagnetic navigation signals and the electromagnetic interference. A discerned position is determined for each of one or more jamming antennas emitting the electromagnetic interference. A detection circuit determines each discerned position from the electromagnetic interference received at the device and at least one measurement of the evolving position using the electromagnetic navigation signals. The evolving position of the device is determined while the electromagnetic interference prevents subsequently measuring the evolving position using the electromagnetic navigation signals. An evaluation circuit determines the evolving position from the electromagnetic interference received at the device and from each discerned position of the one or more jamming antennas.

The systems and methods use Hermetic Transform processing to achieve higher resolution in space, time, and frequency measurements, leading to enhanced object detection, localization, and classification, and can improve several aspects of RADAR, including: phased-array beamforming, Doppler filter processing, pulse compression/replica correlation, and in the creation of higher resolution ambiguity function measurements for both multi-static active and passive RADAR.

The systems and methods use Hermetic Transform processing to achieve higher resolution in space, time, and frequency measurements, leading to enhanced object detection, localization, and classification, and can improve several aspects of RADAR, including: phased-array beamforming, Doppler filter processing, pulse compression/replica correlation, and in the creation of higher resolution ambiguity function measurements for both multi-static active and passive RADAR.

Methods and systems are disclosed for automated and continuous instrument tracking and management thereof. The method includes receiving a list of medical tools or instruments, associating each medical tool within the list a status, monitoring information associated with a radio frequency identification (RFID) associated with a first medical tool, wherein the monitoring is executing using a plurality of sensors, detecting a presence of the first medical tool based upon the monitoring; and changing the status associated with the first medical tool based upon the detecting.

A system and method for determining an Angle of Arrival (AOA) for frequency modulated communications. The system may include first and second antennas spaced apart from each other by a distance, and configured to receive wireless communications in the form of a modulated signal. The system may determine a phase difference between the received signals based on one or more samples of a dedicated portion of the received signals, where one or more aspects of the dedicated portion is variable.

Various technologies pertaining to computing angle of arrival of radio signals are described. A system that is configured for computing the angle of arrival of a radio signal includes a cylindrical sheath wrapped around a cylindrical object, where the cylindrical sheath acts as a ground plane. The system further includes a plurality of antennas that are positioned about an exterior surface of the cylindrical sheath, and receivers respectively coupled to the antennas. The receivers output measurements pertaining to the radio signal. A processing circuit receives the measurements and computes the angle of arrival of the radio signal based upon the measurements.

A method and an apparatus are provided for determining the location of a mobile device using multiple wireless access points, each wireless access point comprising multiple antennas. The apparatus and method are particularly suited to location of a mobile device in an indoor environment, such as a building. The method includes receiving a communication signal from the mobile device at each of multiple antennas of said multiple wireless access points; for each wireless access point, determining angle-of-arrival information of the received communication signal at the wireless access point, based on a difference in phase of the received signal between different antennas; collecting, from each of the multiple wireless access points, the determined angle-of-arrival information for the received communication signal from the mobile device; and estimating the location of the mobile device from the collected angle-of-arrival information.

A method and an apparatus are provided for determining the location of a mobile device using multiple wireless access points, each wireless access point comprising multiple antennas. The apparatus and method are particularly suited to location of a mobile device in an indoor environment, such as a building. The method includes receiving a communication signal from the mobile device at each of multiple antennas of said multiple wireless access points; for each wireless access point, determining angle-of-arrival information of the received communication signal at the wireless access point, based on a difference in phase of the received signal between different antennas; collecting, from each of the multiple wireless access points, the determined angle-of-arrival information for the received communication signal from the mobile device; and estimating the location of the mobile device from the collected angle-of-arrival information.

A method for determining a position of a receiver is provided. The method includes the emission of at least one electromagnetic field by a respective transmitter, an amplitude of the at least one electromagnetic field rotating respectively with respect to the respective transmitter. The method includes the measurement of the at least one electromagnetic field by the receiver and the determination of a differential phase. The method further includes the determination of the position based on the at least one differential phase.

A system for locating RFID tags in an area includes a platform and an RFID reader head associated with the platform. At least one support extends between the platform and an anchor position within an area. Separate support adjustment devices are associated with each support, with each support adjustment device being operable to adjust the length of the associated support between the platform and the anchor position associated with the support. So adjusting the length of the support varies the location of the RFID reader head in the area, thereby allowing an RFID reader associated with the RFID reader head to monitor a larger area than would otherwise be possible if the RFID reader were to remain in a fixed location. The RFID reader head itself may be movable with respect to the platform for finer adjustment of the position of the RFID reader.