Abstract: A method comprises using a first directional transceiver (14A) to determine a first angle (?1) between a first vector (V1) from the first directional transceiver to a second directional transceiver (14B) and a second vector (V2) from the first directional transceiver to a third directional transceiver (14C), using the second directional transceiver to determine a second angle (?2) between a third vector (V3) from the second directional transceiver to the first directional transceiver and a fourth vector (V4) from the second directional transceiver to the third directional transceiver, calculating a location, relative to a local coordinate system, of the third directional transceiver using the first and second angles and locations in the local coordinate system of the first and second directional transceivers, the local coordinate system being defined relative to the locations of the first, second, and third directional transceivers, and calculating an orientation relative to the local coordinate system of the

Abstract: Method, apparatus, and computer program product example embodiments provide short-range communication based location finding. According to an example embodiment of the invention, a method comprises receiving, by a first transceiver of an apparatus mounted on a moveable platform, from a remote device, one or more wireless packets including information packets containing angle of arrival information from the remote device, wherein the moveable platform is in motion relative to the remote device; determining in the apparatus, at least a first angle of arrival from the received angle of arrival information; and generating distance estimation data in the apparatus relative to the remote device, based on the determined first angle of arrival.

Abstract: A portable battery-powered communications device is configured to operate in a bidirectional communications mode in which voice and/or data is communicated in a bidirectional manner using a bi-directional communications protocol; and to operate in an emergency beacon mode. When the device is in the emergency beacon mode the device is configured periodically to transmit an emergency positioning message at maximum power using the bi-directional communications protocol, transmission of the emergency positioning message defining a beacon transmit period; optionally, to listen for transmissions using the bi-directional communications protocol in a beacon response period immediately following the beacon transmit period; and to refrain from powering transmit and receive circuitry of the device other than during the beacon transmit period and the beacon response period.

Abstract: A method, comprising: detecting, at an apparatus, one or more radio signals from a first location; using the one or more detected radio signals to estimate a bearing from the first location; and using the bearing estimate to determine whether further detection of one or more radio signals is required before positioning the apparatus; and positioning of the apparatus using a bearing and constraint information.

Abstract: A method including receiving signals associated with multiple antenna elements; obtaining a parameter of the received signals for at least some of the multiple antenna elements; testing the obtained parameters; if the test fails, rejecting the received signals for use in positioning the apparatus; if the test passes, using the received signals for positioning the apparatus.

Abstract: A method comprising: receiving signals associated with multiple antenna elements; determining constraint information based upon an atmospheric pressure measurement taken at an apparatus; and using the received signals and the constraint information to determine the position of the apparatus.

Abstract: A method comprises using a first directional transceiver (14A) to determine a first angle (?1) between a first vector (V1) from the first directional transceiver to a second directional transceiver (14B) and a second vector (V2) from the first directional transceiver to a third directional transceiver (14C), using the second directional transceiver to determine a second angle (?2) between a third vector (V3) from the second directional transceiver to the first directional transceiver and a fourth vector (V4) from the second directional transceiver to the third directional transceiver, calculating a location, relative to a local coordinate system, of the third directional transceiver using the first and second angles and locations in the local coordinate system of the first and second directional transceivers, the local coordinate system being defined relative to the locations of the first, second, and third directional transceivers, and calculating an orientation relative to the local coordinate system of the

Abstract: For enabling a situational adjustment of the frequency of a periodic transmission by a mobile apparatus, which enables a determination of positions of the mobile apparatus, at least one criterion for an adjustment of the frequency is monitored. When it is detected that the at least one criterion is met, an adjustment of the frequency is caused. The actions may be performed at the mobile apparatus or at a stationary apparatus providing re-configuration messages to the mobile apparatus.

Abstract: Method, apparatus, and computer program product example embodiments provide short-range communication based direction finding. According to an example embodiment of the invention, a method comprises transmitting by a target device, information in one or more advertising packets, including preferences of the target device for using data signing associated with direction finding; and receiving by the target device from a tracker device, one or more direction finding request packets including a request for data signing corresponding with the target device preferences.

Abstract: Apparatus (30) comprises a battery power supply, a radio-frequency transceiver, a multi-element antenna, and processor and memory. Software causes the apparatus (30): when in an idle mode, to broadcast positioning service advertisements and to refrain from broadcasting positioning packets, when in a positioning mode to broadcast positioning packets from each of the elements of the antenna (32A-C) such as to allow a mobile device (10) to determine a bearing to the mobile device (10) from the apparatus (30), and to transition from the idle mode to the positioning mode in response to receiving either a) a wake-up command or b) a positioning packet, from another apparatus including a multi-element antenna.

Abstract: In a non-limiting and example embodiment, a method is provided for facilitating direction calculation, comprising: detecting, by an apparatus at least one indication frame from another apparatus, determining properties associated with transmission of at least one subsequent frame from the another apparatus on the basis of the at least one indication frame, and gathering measurement information for direction calculation on the basis of the determined properties and the at least one subsequent frame from the another apparatus.

Abstract: A portable battery-powered communications device is configured to operate in a bidirectional communications mode in which voice and/or data is communicated in a bidirectional manner using a bi-directional communications protocol; and to operate in an emergency beacon mode. When the device is in the emergency beacon mode the device is configured periodically to transmit an emergency positioning message at maximum power using the bi-directional communications protocol, transmission of the emergency positioning message defining a beacon transmit period; optionally, to listen for transmissions using the bi-directional communications protocol in a beacon response period immediately following the beacon transmit period; and to refrain from powering transmit and receive circuitry of the device other than during the beacon transmit period and the beacon response period.

Abstract: Apparatus comprises one or more processors in communication with one or more memories. The one or memories have stored therein one or more computer programs that include computer code configured such as when executed to cause the processor to: receive data derived from a multi-element antenna direction finding arrangement; process the received data to provide elevation and azimuth vector data; determining whether the elevation data meets a reliability criterion. On a positive determination the elevation and azimuth data is used to calculate a location. On a negative determination, the data is processed to provide one-dimensional azimuth vector data; and the one-dimensional azimuth vector data is used in conjunction with other vector data to calculate a location.

Abstract: Method, apparatus, and computer program product example embodiments provide short-range communication based location finding. According to an example embodiment of the invention, a method comprises receiving, by a first transceiver of an apparatus mounted on a moveable platform, from a remote device, one or more wireless packets including information packets containing angle of arrival information from the remote device, wherein the moveable platform is in motion relative to the remote device; determining in the apparatus, at least a first angle of arrival from the received angle of arrival information; and generating distance estimation data in the apparatus relative to the remote device, based on the determined first angle of arrival.

Abstract: Method, apparatus, and computer program product example embodiments provide short-range communication based direction finding. According to an example embodiment of the invention, a method comprises transmitting by a target device, information in one or more advertising packets, including preferences of the target device for using data signing associated with direction finding; and receiving by the target device from a tracker device, one or more direction finding request packets including a request for data signing corresponding with the target device preferences.

Abstract: A method including receiving signals associated with multiple antenna elements; obtaining a parameter of the received signals for at least some of the multiple antenna elements; testing the obtained parameters; if the test fails, rejecting the received signals for use in positioning the apparatus; if the test passes, using the received signals for positioning the apparatus.

Abstract: A method, comprising: detecting, at an apparatus, one or more radio signals from a first location; using the one or more detected radio signals to estimate a bearing from the first location; and using the bearing estimate to determine whether further detection of one or more radio signals is required before positioning the apparatus; and positioning of the apparatus using a bearing and constraint information.

Abstract: A system for indicating the relative direction of a target object or location as determined from the current position of a wireless communication device. The system employs Direction of Arrival determination using an antenna array for indicating the direction of a target device and includes facilities to activate a location-indicating transmission in a target device, the ability to request that a location-indicating transmission be activated in a remote target device, relevant information reception from a target device and the display of all potential target devices within effective transmission range of the wireless communication device.

Abstract: A system for indicating the relative direction of a target object or location as determined from the current position of a wireless communication device. The system employs Direction of Arrival determination using an antenna array for indicating the direction of a target device and includes facilities to activate a location-indicating transmission in a target device, the ability to request that a location-indicating transmission be activated in a remote target device, relevant information reception from a target device and the display of all potential target devices within effective transmission range of the wireless communication device.

Abstract: A system for enhancing the performance of a wireless communication device (WCD) while executing a direction of arrival (DoA) estimation. The performance may be improved through device management, and may include the collection of information from one or more sensors installed within the WCD. The sensor information may initially be used to determine an appropriate configuration for the device. Further, the sensor information may also be used to affect the behavior of the device while performing the DoA estimation.