A mobile wireless device locating method at a mobile wireless device includes: determining, based at least in part on measurements of first signals, first location information for the mobile wireless device; sending a request for transceiver information based on the first location information; receiving the transceiver information at the mobile wireless device, the transceiver information including transceiver identifiers and corresponding locations; measuring second signals from at least some of the transceivers included in the transceiver information, at least one of the second signals being from an uncooperative terrestrial base station capable of bi-directional communications and configured to prevent data and/or voice communications with the mobile wireless device; and determining second location information for the mobile wireless device using information obtained from measuring the second signals.

A method, apparatus and computer readable storage medium are provided that are configured to obtain or hold available radio map information representing a radio map representing a plurality of radio models for a plurality of radio devices. Each radio model is indicative of an expected radio-signal-strength field of a radio signal transmitted by a respective radio device of the plurality of radio devices. The method, apparatus and computer readable storage medium are also configured to determine, at least partially based on the radio map information, one or more round-trip-time positioning sections of an environment covered by the radio map and to provide round-trip-time positioning information causing estimating a position of a mobile device at least partially based on round-trip-times associated with radio signals observed by the mobile device within one of the one or more round-trip-time positioning sections of the environment covered by the radio map.

A method for assisting in locating a position of a mobile wireless device includes: obtaining location information of an approximate location of the mobile wireless device; generating an almanac of base stations based at least in part on proximity of locations of the base stations to the approximate location of the mobile wireless device, the almanac of base stations comprising at least one cooperative terrestrial base station that can communicate with the mobile wireless device in at least one mode and at least one uncooperative terrestrial base station capable of bi-directional communications and configured to prevent data and voice communications with the mobile wireless device, the at least one uncooperative terrestrial base station being configured to acknowledge a message received from the mobile wireless device; and providing the almanac of base stations to the mobile wireless device.

The present disclosure provides a spread spectrum landing system with a low probability of intercept altimeter that is in communication with a plurality of asymmetrically placed antennas or transponders near a landing area. The low probability of intercept altimeter acts as a secondary system in the event that a primary landing system for the mobile platform is denied or otherwise inoperable. The low probability of intercept altimeter cycles through unique pseudo noise (PN) codes to determine a line of sight relative to each antenna or transponder. A single algorithm or process determines and ranges the platform relative to the transponders to effectuate the landing of the platform.

Systems and methods for locating a position of a mobile device are provided. The system can include a plurality of anchors. Each anchor can be positioned at a fixed location. The plurality of anchors can be configured to communicate with one another and with the mobile device by transmitting data packets formatted according to a media access control (MAC) frame structure. The MAC frame structure can include a beacon period for synchronizing the plurality of anchors in the system via transmission of a first set of communication packets. The MAC frame structure can include a contention-free period. The MAC frame structure can include a contention period. The system can include a position estimator configured to estimate the position of the mobile device.

A system and method for estimating the position of a receiver and/or timing information for a receiver based on emissions from radio signal sources meant for applications other than position/navigation/time (PNT) estimation.

This disclosure provides systems and methods for determining a location of a mobile device within an indoor environment. An embodiment of the system can have one or more positioning nodes (PONs), each having one or more antennas. Each PON can be disposed at a location within indoor environment and configured to transmit signals via the one or more antennas. The signals transmitted from the antennas of the PONs can be synchronized in time and frequency. A server communicatively coupled to the PONs and storing aiding information, including location and signal information related to the PONs, can transmit the aiding information to a mobile device. The mobile device can receive the signals from use the PONs and use the aiding information to determine a three dimensional position within the indoor environment based on one-way time difference of arrival of the signals.

A method and transmit/receive apparatus in a wireless communication system supporting ranging capability are provided. The method and the transmit/receive apparatus comprises: identifying ranging apparatuses; identifying a ranging control message (RCM) including a ranging device management information element (RDM IE) and roles of the ranging apparatuses, the RDM IE including a content field, wherein the ranging apparatuses include the transmit apparatus and at least one receive apparatus; and transmitting, to the ranging apparatuses over a broadcast channel, the RCM including the RDM IE in a ranging round (RR).

Systems and methods are presented for sharing the ultra-wide band (UWB) spectrum. The systems and methods can include allocating a designated time slice for UWB position determination signals on a primary basis to ensure that the UWB transmissions would be free of interference. The systems and methods can also include synchronizing a plurality of UWB transceivers and emitting synchronized pulses, during the designated time slice.

Systems and apparatuses for determining location of a wireless arbitrary device are disclosed herein. In one example, an asynchronous system for localization of a wireless arbitrary device in a wireless network architecture includes a plurality of wireless anchor nodes each having a wireless device with one or more processing units and RF circuitry for transmitting and receiving communications in the wireless network architecture. The one or more processing units of at least one wireless anchor node are configured to receive instructions to prepare for localization of the wireless arbitrary device, to change a RF channel to be the same as an RF channel of the wireless arbitrary device based on the received instructions, to receive a communication including data traffic from the wireless arbitrary device, and to obtain ranging information including a receive timestamp and channel sense information (CSI) from the data traffic.