A method and apparatus for zero interference multi-gigabit inter-satellite communication between system satellites (300) and client satellites (301) using millimeter wave beams at transmit and receive frequencies that are aligned to the peak atmospheric molecular absorption frequencies in the electromagnetic spectrum (FIG. 1). The narrow low power beams are accurately steered within a restricted set of directions (FIG. 5) that prevent interference to other space borne radio receivers whether in geostationary or low earth orbits and cannot interfere with terrestrial receivers due to atmospheric absorption. The apparatus comprises an integrated electronically steered 2-D phased array (401), transceiver and baseband integrated circuits (402, 403) with a beam controller (404) coupled to the spacecraft attitude determination and control subsystem (407), central processing unit (406) and solid state storage device (405).

A technique for locating a target tag (110) using a short range radio based positioning system comprising a plurality of localization components (120) is provided, wherein the target tag (110) and the plurality of localization components (120) are configured to perform ranging measurements among each other using short range radio technology. A method implementation of the technique is performed by an orchestration component (100) of the positioning system and comprises sending, using long range radio technology, a ranging plan to the target tag (110) and one or more of the plurality of localization components (120), the ranging plan instructing the target tag (110) and the one or more of the plurality of localization components (120) to perform, using the short range radio technology, ranging measurements among each other enabling to locate the target tag (110).

Provided is a radio source position estimation system including a plurality of radio transmission devices spaced a predetermined distance apart from one another and configured to transmit radio frequency (RF) signals received from an arbitrary radio source and a central radio reception device configured to estimate a position of the radio source using the RF signals received from at least three radio transmission devices.

A method for sharing user equipment state estimates between nodes within a wireless communication network comprises initiating of transmission of at least one of obtained user equipment kinematic state estimate information and obtained user equipment type state estimate information to a receiving network node as a response to an obtained indication of a need for sharing user equipment state estimates. The obtained user equipment kinematic state estimate information comprising a latest kinematic state update time, as well as mode state vector estimates, mode covariance matrices and mode probabilities for at least one user equipment kinematic mode. The obtained user equipment type state estimate information comprising a latest type state update time and a type state probability estimate. A method for receiving and propagating the user equipment state estimates, and devices for both methods are also disclosed.

This disclosure describes systems, methods, and devices related to passive location measurement in wireless communications. A device may perform a ranging measurement with a first device and a second device. The device may identify a first uplink (UL) location measurement report (LMR) received from the first device. The device may identify a second UL LMR received from the second device. The device may cause to send a first broadcast LMR comprising information associated with the ranging determination of the first device and the second device. The device may cause to send a second broadcast LMR comprising the measurement information carried in the first UL LMR and the second UL LMR.

Various embodiments determine a position of a wireless device and enable the wireless device to retrieve the determined location. In one embodiment, a system comprises of at least one wireless transmitting device, a plurality of wireless receivers, and at least one server. Each of the plurality of wireless devices receive signals from the wireless transmitting device with unknown position and send time stamped information to the server. Each of the plurality of wireless device also sends unique identifying information about the wireless transmitting device. The server calculates a position of the wireless transmitting device by considering the inputs received from the plurality of wireless receivers. The wireless device obtains its position from the server. The process can be executed on demand or at regular frequent intervals.

A search and rescue (from hereon, SAR) optimization/prevention system is set forth, for ensuring the safety and connectivity of people in locations such as but not limited to national parks, hiking trails, mountains, lakes, rivers, forests, and other areas that do not receive (or receive inconsistently) reliable cellular, satellite, or GPS network connectivity. The mesh network system comprises wearable devices used by the person being located, and transceivers responsible for getting a signal from the user to a responder via the bouncing of a signal. Once a signal is received at a designated transceiver, the system may output information about the at least approximate location and condition of the user that transmitted the signal, including the approximate location, time of distress, and other pertinent data, based on information carried in the signal.

A positioning method, as well as the system of base stations (T1,T2,T3) and detector (I) is based on measuring the propagation time difference of externally controlled electromagnetic pulses (F1,F2,F3) and the arrival signals of the controlled base station during a measurement cycle (t1+t2). In one embodiment, a reference clock is not required for measuring propagation time differences, but instead, accurate fixed distances between base stations can be used as a reference. System calibration is rarely performed. It checks the mutual locations of base stations. This may be partially automated. The positioning system does not require any sensors.

A location server configured to determine a location of communications devices with respect to a location of infrastructure equipment of a wireless access network from observed time differences between receiving positioning reference signals transmitted by a plurality of the infrastructure equipment and received by the communications devices.

A method and apparatus for locating a beacon in physical space, where the beacon communicates with at least one of a plurality of gateways in the physical space. First signals are transmitted between gateways located at respective physical locations. Gateway-to-gateway measurements of power related to the first signals are stored. The gateway-to-gateway measurements are averaged to obtain averaged gateway-to-gateway measurements. Second signals are transmitted between a beacon and one or more of the gateways. Beacon-to-gateway measurements of power related to the second signals are stored. The beacon-to-gateway measurements are averaged to obtain averaged beacon-to-gateway measurements. First distances between the beacon and the gateways are calculated based on the averaged gateway-to-gateway measurements and the averaged beacon-to-gateway measurements. Second distances are calculated based on at least ones of the averaged beacon to gateway measurements and an expected measurement of power related to the beacon. Position of the beacon is determined based on the second distances. The position of the beacon is transmitted so that the position is subsequently displayed.