Andrew Corporation

Commscope Technologies LLC

Parsons Corporation

Martin C Alles

John Peter Carlson

Selcuk Mazlum

George Maher

Thomas Booker Gravely

Joseph P Kennedy

Khalid W Al-Mufti

Andrew E Beck

Doug Blackburn

Suryanarayana A Kalenahalli

Navin Srinivasan

Sharif Shaher

Tosin Osinusi

Zachary Hester

Ryan Riveland

John P Carlson

Tom Gravely

Javier F Cereceda

Abdulwahaab Arif

Carlson John

Maher George

Two receivers located within a region of interest that is sufficiently small as compared to a distance to a source of a signal can be considered a 'point'. Signals received at that “point” are planar. Accordingly, any difference in the time of arrival of a signal from the source by one receiver as compared to another receiver located within that region stablishes a locus of points representing a distance between the receivers perpendicular to the vector pointing to the source. Using signals from multiple far sources multiple loci on which one receiver must exist as compared to the other receiver can be identified. The convergence of these loci identifies a relative position of one receiver from the other, and when the geospatial position of one receiver is known, so too is the position of the other receiver.

Far-source position determination

A system and method to opportunistically receive and use measurements on a priori unknown radio signals, not intended for radio navigation or geolocation, in conjunction with aiding data to improve navigation/geolocation position and time estimation yield and accuracy.

System and method for aiding data processing for signals of opportunity-based assured position, navigation and timing (PNT)

A system and method for determining the location of a target mobile device in a communications network. A set of mobile devices in proximity to the target mobile device may be determined () as a function of a common parameter of information observed by mobile devices in the set. Measurement data may be shared () for the set of mobile devices and the target mobile device, and a location of the target mobile device () determined as a function of the shared measurement data. This sharing of measurement data may occur amongst the set of mobile devices and the target mobile device or may also occur at a communication network entity.

System and method for location boosting using proximity information

This disclosure pertains to systems and methods that may be used to increase the information content of a mobile device so as to locate, track, or determine the behavior of a mobile device and/or the user of the mobile device. Separate pieces of information (information snippets) may be aggregated over time to form information linkages. The snippets and linkages may be associated with a time stamp and/or a time frame. The snippets and linkages may be associated with a probability value which may be updated as more information is acquired. The snippets and linkages may be aggregated with, for example a building floor plan to provide more complete informational description of the mobile device and/or the behavior of the user of the mobile device (information map).

System and method for information enhancement in a mobile environment

The present disclosure describes systems and methods for determining intermodulation distortion in a system such as, but not limited to, a communication system. In an embodiment, intermodulation distortion is determined by injecting a signal into a frequency band which interacts with a second signal, searching a second frequency band for a product signal formed from the first and second signals, applying a cyclostationarity detection technique to the product signal and identifying the product signal as an intermodulation distortion signal.

System and method for passive intermodulation identification using cyclostationary signals

A system and method for determining the location of a target mobile device in a communications network. A set of mobile devices in proximity to the target mobile device may be determined as a function of a common parameter of information observed by mobile devices in the set. Measurement data may be shared for the set of mobile devices and the target mobile device, and a location of the target mobile device determined as a function of the shared measurement data. This sharing of measurement data may occur amongst the set of mobile devices and the target mobile device or may also occur at a communications network entity.

The present disclosure describes systems and methods for identifying a signal that is a product of two or more other signals. In an embodiment, the presence of intermodulation distortion in a communication system is determined by comparing a cyclic autocorrelation function ('CAF') of a complex envelop of signal content in a frequency bin, comparing the determined CAF with the CAF for a known signal type, and comparing a frequency of the signal content with the frequency of an RF channel in the communication system.

System and method for determining intermodulation distortion in a radio frequency channel

A system and method for determining the location of a mobile device in a communications network. A set of network measurement reports (NMR) may be provided for a region in the network. NMRs in the first set may be clustered as a function of observed measurement information in the NMRs. A candidate NMR for a mobile device may be received, and the candidate NMR may then be associated with a selected cluster of NMRs. The candidate NMR and a second set of NMRs may then be clustered, and a location of the mobile device determined as a function of the clustered candidate NMR and second set of NMRs, where the NMRs in the second set are associated with the selected cluster.

System and method for mobile location by dynamic clustering

A system and method for generating a calibration database in a communications network. A grid of geographic locations may be generated to cover a region in a communications network having a plurality of cellular sites. A set of network measurement reports (NMRs) is generated for the region, the NMR being a collection of measurement parameters observed at selected geographic locations in the grid. A label may then be generated representing a first measurement parameter observed from ones of the plural cellular sites at one of the selected geographic locations, the label including a relative ranking by cellular site of the first measurement parameter. Using this generated label, a calibration database for the communications network may be populated and locations of mobile devices determined therefrom.

System and method for mobile location using ranked parameter labels

A system and method modifies calibration data used to geo-locate a mobile station. Calibration data measured via a calibration data collection device may contain errors due to the physical limitations of the collection device and/or the collection process. Any data collection device may produce some degree of signal degradation or drop-out. Dead reckoning provides a remedy for signal drop-out, however, it often produces data results that may be unsatisfactory to perform an accurate location estimate. To ensure the integrity of the collected calibration data, a data modification and/or data replacement algorithm may be implemented to enhance the accuracy of the collected data. In addition, current collection procedures used to generate a calibration database may be laborious, time-consuming and expensive. Simplifying the test and measurement equipment needed, and the procedures for obtaining calibration data may save time and expenses.

System and method to collect and modify calibration data

A signal is received from a mobile device as multiple data samples. The received signal includes a first component corresponding to a known reference signal and a second component corresponding to an unknown channel impairment or an unknown noise. A sequence of blocks is formed based on the received samples. The first component of the received signal corresponding to the reference signal is known to within a constant phase shift over each block. A plurality of function values are generated as a function of time, frequency, and phase, based on the received signal, corresponding to a plurality of times, a plurality of frequencies, and a plurality of phase sequences. A time, a frequency, and a phase sequence corresponding to an optimal value the function values are determined. The determined time is outputted as a time of arrival of the received signal.

System and method for sub-coherent integration for geo-location using weak or intermittent signals

A method of modifying calibration data used to geo-locate a mobile station located in an indoor environment is disclosed. When a mobile station is located indoors, the signal strength of signals received and/or transmitted by the mobile station have the tendency to be lower than the strength of the signals received by a mobile station located outdoors. As a result of these lower signal strengths, geo-location efforts which rely on signal strengths may result in unsatisfactory location accuracy. Modifying pre-existing calibration data obtained outdoors may provide a way to simulate indoor calibration data characteristics.

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Vienna, VA, United States of America

Martin C Alles