Disclosed are examples of systems, apparatus, methods and computer program products for locating unmanned aerial vehicles (UAVs). A region of airspace may be scanned with two scanning apparatuses. Each scanning apparatus may include one or more directional Radio Frequency (RF) antennae. The two scanning apparatuses may have different locations. Radio frequency signals emitted by a UAV can be received at each of the two scanning apparatuses. The received radio frequency signals can be processed to determine a first location of the UAV.

Disclosed are examples of systems, apparatus, methods and computer program products for locating unmanned aerial vehicles (UAVs). A region of airspace may be scanned with two scanning apparatuses. Each scanning apparatus may include one or more directional Radio Frequency (RF) antennae. The two scanning apparatuses may have different locations. Radio frequency signals emitted by a UAV can be received at each of the two scanning apparatuses. The received radio frequency signals can be processed to determine a first location of the UAV.

Disclosed are examples of systems, apparatus, methods and computer program products for locating unmanned aerial vehicles (UAVs). A region of airspace may be scanned with two scanning apparatuses. Each scanning apparatus may include one or more directional Radio Frequency (RF) antennae. The two scanning apparatuses may have different locations. Radio frequency signals emitted by a UAV can be received at each of the two scanning apparatuses. The received radio frequency signals can be processed to determine a first location of the UAV.

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.

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 frequency modulated signal. The system may determine a phase difference between the received signals irrespective of the modulations in the signal, thereby facilitating determining an AOA.

Systems and methods for localization and passive entry/passive start (PEPS) systems for vehicles are provided. A communication gateway establishes a wireless communication link with a portable device. Sensors receive connection information about the wireless communication link that includes a channel map, a next channel for communication, a next channel time for communication, a parameter for calculating a subsequent channel, and (v) a channel hop interval indicating a time interval for communication. Each sensor receives communication packets sent from the portable device based on the connection information and measures signal information. A localization module determines a location of the portable device based on the signal information. A PEPS system performs a vehicle function including at least one of unlocking a door of the vehicle, unlocking a trunk of the vehicle, and allowing the vehicle to be started based on the location of the portable device.

Systems and methods for localization and passive entry/passive start (PEPS) systems for vehicles are provided. A communication gateway establishes a wireless communication link with a portable device. Sensors receive connection information about the wireless communication link that includes a channel map, a next channel for communication, a next channel time for communication, a parameter for calculating a subsequent channel, and (v) a channel hop interval indicating a time interval for communication. Each sensor receives communication packets sent from the portable device based on the connection information and measures signal information. A localization module determines a location of the portable device based on the signal information. A PEPS system performs a vehicle function including at least one of unlocking a door of the vehicle, unlocking a trunk of the vehicle, and allowing the vehicle to be started based on the location of the portable device.

A method and apparatus least partially reconfigure a radio positioning support system. The radio positioning support system determines a position of a mobile device at least partially based on a radio positioning support signal transmitted by the mobile device. The method includes obtaining a plurality of reference observation reports. Each reference observation report is associated with a respective radio positioning support device and wherein each reference observation report represents scanning results from scanning, by the respective radio positioning support device with which the respective reference observation report is associated, for radio reference signals transmitted by other radio positioning support devices. The method also includes determining, based on the reference observation reports, whether a predetermined radio positioning support criterion is met by the radio positioning support system and, if not, determining reconfiguration information for at least partially reconfiguring the radio positioning support system.

A method and apparatus least partially reconfigure a radio positioning support system. The radio positioning support system determines a position of a mobile device at least partially based on a radio positioning support signal transmitted by the mobile device. The method includes obtaining a plurality of reference observation reports. Each reference observation report is associated with a respective radio positioning support device and wherein each reference observation report represents scanning results from scanning, by the respective radio positioning support device with which the respective reference observation report is associated, for radio reference signals transmitted by other radio positioning support devices. The method also includes determining, based on the reference observation reports, whether a predetermined radio positioning support criterion is met by the radio positioning support system and, if not, determining reconfiguration information for at least partially reconfiguring the radio positioning support system.

Methods and apparatus for verifying respective positions of Nodes based upon wireless communications between Nodes included in an array. Values for variables derived from multiple wireless transmissions between Nodes are aggregated, and a position of a particular Node may be determined based upon multiple data sets generated by multiple communications between disparate Nodes. In addition, the presence of an obstacle to wireless communication between some Nodes may be derived from the data sets. A user interface may provide a pictorial view of positions of all or some Nodes in an array, as well as a perceived obstruction.