Trimble Navigation Limited

Trimble Inc.

Stuart Riley

Michael Cash

Vivek Nadkarni

Eric C Krantz

Jeffery Allen Hamilton

Peter Raby

William Lentz

Andrew Peter John Cartmell

Methods for determining corrected positions of a global navigation satellite system (GNSS) rover using a GNSS base station and one or more GNSS reference stations include determining a statistical representation of position measurements from the GNSS reference stations and an instantaneous position measurement from the GNSS reference stations. A position correction is determined based on the statistical representation and the instantaneous position measurement. A corrected position of the GNSS rover is determined based on a position of the GNSS rover and the position correction.

Mobile reference station for GNSS positioning

A global navigation satellite system (GNSS) receiver including an antenna module configured to removably attach to a receiver module. The antenna module includes an antenna configured to receive wireless signals transmitted by a GNSS satellite. The antenna is coupled to a wired connection. The antenna module also includes an antenna-side radio that is coupled to the wired connection. The antenna-side radio is configured to perform actions including sending, via the wired connection, an identifying signal to a receiver-side radio. The identifying signal includes identification information corresponding to the antenna. The receiver module includes the receiver-side radio coupled to the wired connection. The receiver-side radio is configured to perform operations including receiving, via the wired connection, the identifying signal from the antenna-side radio. The receiver module also includes a radio frequency (RF) front end coupled to the wired connection.

GNSS receiver to antenna communications

Systems and methods for identifying which of a plurality of signal types received by a global navigation satellite system (GNSS) receiver includes a spoofing signal. One method may include, for each particular signal type of the plurality of signal types, excluding the particular signal type, calculating a parameter of a GNSS receiver based on the received wireless signals having a plurality of remaining signal types, and calculating a residual score based on a variability associated with calculating the parameter, the residual score being one of a plurality of residual scores. The method may also include identifying an outlier of the plurality of residual scores and identifying which of the plurality of signal types includes a spoofing signal based on the outlier.

Anti-spoofing system for GNSS receivers

A low noise amplifier (LNA) assembly comprising a filter circuit for receiving signals from a Mobile Satellite Service (MSS) band and a Radio Navigation Satellite Service (RNSS) band; and an alternative filter circuit configured to filter out a jammer signal.

Filtering out a jammer signal

Embodiments of the present invention recite a method and system for implementing export control for a Global Navigation Satellite System (GNSS) receiver. In one embodiment, a GNSS receiver is used to determine the geographic position of an electronic device. It is then determined that the geographic region corresponds to an exclusion zone. In response to determining that the geographic region corresponds to the exclusion zone, accessing data from the electronic device is prevented.

Export control for a GNSS receiver

Embodiments of the present technology recite a method and system for maintaining integrity of a binary offset carrier (BOC) signal. In one embodiment, a first correlator is configured for multiplying a timing signal with an internally generated pseudo-random noise (PRN) signal to create a reference signal. The first correlator is further configured for combining the reference signal with a received PRN signal and outputting a first correlation function based upon the combining. A second correlator is configured for multiplying the internally generated PRN signal with the received PRN signal and for outputting an integrity correlation function. A comparison component is configured for determining the offset of the reference signal relative to the received PRN signal based upon a comparison of the integrity correlation function with the first correlation function.

Method and system for maintaining integrity of a binary offset carrier signal

Embodiments of the present invention recite a method and system for implementing login protection and prevention to a Global Navigation Satellite System (GNSS) receiver. In one embodiment, a geospatial data collection device which is communicatively coupled with a GNSS receiver is authenticated. It is then determined that the geospatial data collection device is authorized to collect data from a geographic region in which the GNSS receiver is located. The geospatial data collection device is then permitted access to a control interface of the GNSS receiver.

Method and system for GNSS receiver login protection and prevention

Embodiments of the present invention recite a method and system for processing Global Navigation Satellite System (GNSS) signals. In one embodiment, at least one wide-band Radio Frequency (R/F) filter of a signal processing pathway is utilized to pass a plurality of signals from a plurality of satellite navigation systems as a combined signal set. The plurality of signals of the plurality of satellite navigation systems is split based upon the respective frequency of each of the plurality of signals to facilitate reducing the clock rate used to subsequently process each of the plurality of signals.

Sample decimation in a GNSS receiver

Method and apparatus for synchronizing to a reference signal the timing of a received composite, code phase SATPS signal, such as a GPS or GLONASS signal, that consists of a preferred, interference-free signal distorted by at least one interfering signal, to determine an undistorted timing point, such as the preferred signal time of arrival. A first autocorrelation function AC,(&tgr;) is generated between the preferred, interference-free signal and a reference signal that replicates the preferred signal, as a function of the time shift &tgr; between the two signals. A second autocorrelation signal AC,(&tgr;) is measured between the reference signal and the incoming signal. Three amplitudes AC,(&tgr;,), AC,(&tgr;,) and AC,(&tgr;,) of the second autocorrelation function and the corresponding code phase time shift values &tgr;,, &tgr;,and &tgr;,are selected that satisfy at least one of the relations 0<&tgr;,&minus;&tgr;,&equals;f1&Dgr;&tgr;,and 0<&tgr;,&equals;f2&Dgr;&tgr;,, (0<f1, f2&lE;0.5). A shift PRC(t;j;rcv) in a pseudorange value associated with the incoming signal, measured at the user receiver, from at least one SATPS signal source, number j, is determined by a ratio of a first linear combination of the amplitudes AC,(&tgr;,), AC,(&tgr;,) and AC,(&tgr;,), multiplied by a selected parameter K&prime; and divided by a second linear combination of these amplitudes, plus a second selected parameter K&Prime;. The parameters K&prime; and K&Prime; are determined by examination of the first correlation function AC,(&tgr;) and are independent of the values AC,(&tgr;,), AC,(&tgr;,), AC,(&tgr;,), &tgr;,, &tgr;,and &tgr;,, but may depend upon the selected fractions f1 and f2, upon the SATPS satellite number j, upon the characteristics of the receiver, and upon one or more of the coefficients in the linear combinations.

Multipath compensation for pseudorange signals

This invention provides apparatus and methods for obtaining information for aligning a reference signal with a received signal for global positioning satellite receivers which employs at least one correlator for correlating the received signal with the reference signal to generate an accumulated result; the correlator having a comparator to compare the received signal with the reference signal and an accumulator which is either selectively enabled/disabled to prevent overflow errors or is read periodically before an overflow occurs.

Growing community of inventors

San Jose, CA, United States of America

Stuart Riley