A guidance system for a drone is described, said system comprising: a plurality of poles fixed to the ground and associated with a private or public electric power grid; a plurality of devices fixed to the poles and powered by the electric power grid, said devices being interconnected in a wireless network and comprising a radio communication module for communicating with the drone; a controller connected to the wireless network and intended to program a flight path of the drone between two or more poles by transmitting configuration commands to the respective devices of the wireless network, for configuring the radio communication modules, wherein the radio communication module of one pole in the flight path is configured to guide the drone towards the radio communication module of a following pole in the flight path.

A system for determining a location within an area defined by a grid of radio-frequency (RF) tag circuits includes RF exciters that are configured to emit unmodulated RF energy. The grid of the RF tag circuits are configured to receive the unmodulated RF energy from one or more of the RF exciters and to emit modulated RF energy. Each RF tag circuit may store information associated with a location of the RF tag circuit within the area and the modulated RF energy emitted from each RF tag circuit may carry the information.

A system for determining a location within an area defined by a grid of radio-frequency (RF) tag circuits includes RF exciters that are configured to emit unmodulated RF energy. The grid of the RF tag circuits are configured to receive the unmodulated RF energy from one or more of the RF exciters and to emit modulated RF energy. Each RF tag circuit may store information associated with a location of the RF tag circuit within the area and the modulated RF energy emitted from each RF tag circuit may carry the information.

Systems and methods for beacon device fleet management are provided. One example system includes a plurality of beacon devices, a plurality of mobile computing devices, a fleet management system, and a fleet owner computing devices. One example method includes receiving, by the fleet management system, a device status request from the fleet owner computing device. The fleet management system determines one or more operational statuses of beacon devices owned by the fleet owner and transmits data indicative of the one or more operational statuses to the fleet owner computing device. The operational statuses can include a current detection status (e.g., online or offline), a location status, a power source status, and/or other operational parameters.

Systems and methods for a low-frequency radio navigation system are described. The system may include a transmitter comprising a base coded modulator configured to generate a base modulation and a data coded modulator configured to generate a data modulation; wherein the transmitter radiates a continuous, constant-power chirped-FM spread spectrum signal, comprising: the base modulation; and the data modulation, wherein the data modulation is orthogonal to the base modulation. The system may also include a receiver comprising a digital signal processor, wherein at least one matched filter coupled to the digital signal processor, the at least one matched filter configured to decode said base modulation and data-encoded modulation and provide a correlation function for received signals received from at least three geographically-spaced transmitters.

There is described an interior positioning system for tracking spatial position of communication devices within a remote location. The interior positioning system generally has: a radio frequency network distributed through said remote location; beacons spaced-apart from one another throughout said remote location and powered by said radio frequency network, each beacon locally emitting a corresponding beacon identifier which when received by a nearby communication device is communicated over said radio frequency network by said communication device; and a tracking controller being communicatively coupled to said radio frequency network, said tracking controller stored thereon tracking data associating each of said beacon identifiers to respective spatial coordinates, and instructions that when executed perform the steps of: receiving said beacon identifier communicated over said radio frequency network by said communication device, and determining spatial coordinates of said communication device by cross referencing said received beacon identifier to said tracking data.

There is described an interior positioning system for tracking spatial position of communication devices within a remote location. The interior positioning system generally has: a radio frequency network distributed through said remote location; beacons spaced-apart from one another throughout said remote location and powered by said radio frequency network, each beacon locally emitting a corresponding beacon identifier which when received by a nearby communication device is communicated over said radio frequency network by said communication device; and a tracking controller being communicatively coupled to said radio frequency network, said tracking controller stored thereon tracking data associating each of said beacon identifiers to respective spatial coordinates, and instructions that when executed perform the steps of: receiving said beacon identifier communicated over said radio frequency network by said communication device, and determining spatial coordinates of said communication device by cross referencing said received beacon identifier to said tracking data.

An RF position tracking system for wirelessly tracking the three-dimensional position of a tracked object. The tracked object has at least one mobile antenna and at least one inertial sensor. The system uses a plurality of base antennas which communicate with the mobile antenna using radio signals. The tracked object also incorporates the inertial sensor to improve position stability by allowing the system to compare position data from radio signals to data provided by the inertial sensor.

According to one embodiment, a processing device is configured to acquire a reception result obtained by a receiver receiving at least a portion of signals emitted from a plurality of transmitters and determine, based on strengths of the signals, a position of the transmitter at which the receiver is present. The processing device refers to transitionable data when the receiver transitions from a first position of one of the plurality of transmitters to a second position of another of the plurality of transmitters. The processing device approves the transition in a first case in which the transition is determined to be possible based on the transitionable data. The processing device does not approve the transition during a first period in a second case in which the transition is determined to be impossible based on the transitionable data.

According to one embodiment, a processing device is configured to acquire a reception result obtained by a receiver receiving at least a portion of signals emitted from a plurality of transmitters and determine, based on strengths of the signals, a position of the transmitter at which the receiver is present. The processing device refers to transitionable data when the receiver transitions from a first position of one of the plurality of transmitters to a second position of another of the plurality of transmitters. The processing device approves the transition in a first case in which the transition is determined to be possible based on the transitionable data. The processing device does not approve the transition during a first period in a second case in which the transition is determined to be impossible based on the transitionable data.