The system (10) of FIG. 1 uses fixedly-located master and slave smartphone devices (12, 14) to determine a player position of a player (20) within playing arena, such as a tennis court. The master device (12) makes a local determination of the speed of sound using an audible ping to the slave device displaced from the master device by a known distance. The slave device (14) also responds with a time stamp associated with the receipt of one or more pings. Correlation over successive RF-reported time stamps allows the master device (12) to assess, relative to its own internal reference clock, a time offset and drift for a local clock in the slave device (14). A RF connection to a communications circuit and sensor (18) arrangement located in a racket held by a player permits the master device (12) to assess a time offset and drift for a local clock associated with the sensor. The sensor (18) further includes a gyroscope, accelerometer and magnetometer that cooperate to record movement or orientation of the racket, and which information is uplink reported over the RF connection to the master device. When an amplitude or modelled sound profile for a hit event (24) is detected by both the master and slave devices (12, 14) and the hit event time-stamped by the devices in the system and reported to the master by the communications circuits of the racket and slave units, the master unit is able to triangulate the position of the hit event relative to known dimensions of the playing arena. Continuous reporting of movement of the racket relative to the previous hit event can therefore be displayed to show movement of the player around the court relative to detected sound events.

The present invention relates to a method for determining a position of a first device with respect to a second device. According to the method, control data indicative of a receive property of at least one signal received from the first device (110) by a second device (121-124) using a plurality of receiver chains (210-215) is established. At least one receive characteristic of the plurality of receiver chains (210-215) differs for at least two receiver chains of the plurality of receiver chains (210-215). Based on the control data, positioning information for the first device (110) is determined.

The present disclosure relates to a location determination system that includes acoustic transmitting devices (104), location tags (112), and a wireless mesh network (106), where the wireless mesh network uses battery-powered devices. A location tag receives acoustic signals (e.g., ultrasound signals) from an acoustic transmitting device. Clocks from members of the wireless mesh network are synchronized by observation of clock pairings, each clock pair formed by respective clocks in a transmitting device that transmits a message and a receiving device that receives the message. By analyzing the observed clock pairings, a best fit between the clock pairings may be determined. After selecting a reference clock, an acoustic transmission schedule may be propagated to the respective acoustic transmitting device.

Embodiments provide a positioning method, an assistant site, and a system, to improve positioning accuracy of a mobile terminal. The method according to the embodiments of the present invention includes: generating, by an assistant site, a downlink assisted positioning signal; and sending, by the assistant site, the downlink assisted positioning signal to a mobile terminal. The downlink assisted positioning signal can enable a base station to determine position information of the mobile terminal based on a measurement result obtained by the mobile terminal by measuring the downlink assisted positioning signal.

An electronic device according to various embodiments of the present invention may include at least one antenna, a communication module, a sensor module for sensing a direction of the electronic device, and a processor, wherein the processor may be configured to receive at least one wireless communication signal from a first external electronic device through the communication module, obtain direction information of the electronic device using the sensor module, receive at least one wireless communication signal information received at a second external electronic device and direction information of the second external electronic device from the second external electronic device, and determine the direction in which the first external electronic device is located, by using the at least one wireless communication signal information received from the first external electronic device, the direction information of the electronic device, and the at least one wireless communication signal information and the direction information of the second external electronic device received from the second external electronic device. In addition, other embodiments are also possible.

A device can determine its position in a communications system. A scalable solution permits multiple devices to be used in one area without detrimental effect on the accuracy or latency of the position determining. The communications system includes a first base station arranged to transmit a first signal to a second base station arranged receive the first signal and transmit a second signal to the first base station in response The first base station is arranged to receive the second signal and transmit a third signal to the second base station in response to the second signal. delay time measuring unit, round trip time measuring unit, a base station timings unit and a calculating unit are used to calculate a first time difference of arrival based on a first round trip time, first delay time, second round trip time and a second delay time.

The present invention relates to a method to improve the precision of a position information of a roadside unit (RSU), the RSU at least comprising a data communication unit, a memory unit and a processor unit, wherein a saved RSU position is saved in the memory unit as position information of the RSU. Further, the present invention relates to a roadside unit (RSU), at least comprising a data communication unit, a memory unit and a processor unit. In addition, the present invention relates to a system to provide position information in an area, preferably in respect of an advanced driver assistant system (ADAS) and/or autonomous driving.

A geolocationing system and method for providing awareness in a multi-space environment, such as a hospitality environment or educational environment, are presented. In one embodiment of the geolocationing system, a vertical and horizontal array of gateway devices is provided. Each gateway device includes a gateway device identification providing an accurately-known fixed location within the multi-space environment. Each gateway device includes a wireless transceiver that receives a beacon signal from a proximate wireless-enabled personal locator device. The gateway devices, in turn, send gateway signals to a server, which determines estimated location of the wireless-enabled personal locator device.

Disclosed are techniques for wireless communication. In an aspect, a base station performs one or more angle-based measurements in a first coordinate system, determines whether to report, to a positioning entity, the one or more angle-based measurements in a local coordinate system (LCS) or a global coordinate system (GCS), and reports the one or more angle-based measurements to the positioning entity in the LCS or the GCS based on the determination. In an aspect, a positioning entity receives, from a base station, one or more angle-based measurements in an LCS of the base station or a GCS, determines whether the one or more angle-based measurements are in the LCS or the GCS, and processes the one or more angle-based measurements based on the determination.

The present disclosure, a method performed by a Radio Unit, RU, is provided. The method includes: receiving, from a Digital Unit, DU, an instruction to receive a reference signal; receiving, from a terminal device, the reference signal in accordance with the instruction; and transmitting, to the DU, a positioning signal based on the received reference signal.