Patent application number | Description | Published |
20100117894 | Gps-based measurement of roll rate and roll angle of spinning platforms - A system and method for determining the roll rate and roll angle of a spinning platform, using the measured phase differences between the GPS satellite signals received on two or more antennas. The measured phase differences and the navigation solution from a GPS receiver are processed in a Kalman filter to obtain the desired information. Data from non-GPS measurement sources is optionally provided to update the navigation solution. Although of wide applicability, the invention is uniquely suited to the measurement of roll rates and roll angles of fast spinning platforms with small baselines, in which the antennas are separated from each other by distances that are a fraction of the GPS signal wavelength. | 05-13-2010 |
20100289687 | Antijam protected GPS-based measurement of roll rate and roll angle of spinning platforms - A system and method for determining the roll rate and roll angle of a spinning platform in a jamming environment, by suppressing the interference signals from the received GPS signals and using the measured phase and amplitude differences between the GPS satellite signals received on two or more antennas. The measured signal differences and the navigation solution from a GPS receiver are processed in a roll filter to obtain the desired information. Data from non-GPS measurement sources is optionally provided to update the navigation solution. Although of wide applicability, the invention is uniquely suited to the measurement of roll rates and roll angles of fast spinning platforms with small baselines in the presence of jamming, and where the antennas are separated from each other by distances that are a fraction of the GPS signal wavelength. | 11-18-2010 |
20120068884 | GPS-based roll rate and roll angle measurement in the absence of jamming - A system and method for determining the roll rate and roll angle of a spinning platform by using the measured phase and/or amplitude differences between the GPS satellite signals received on two or more antennas. The measured signal differences and the navigation solution from a GPS receiver are processed in a roll filter to obtain the desired information. Data from non-GPS measurement sources is optionally provided to update the navigation solution. Although of wide applicability, the invention is uniquely suited to the measurement of roll rates and roll angles of fast spinning platforms with small baselines in the presence as well as in the absence of jamming, and where the antennas are separated from each other by distances that are a fraction of the GPS signal wavelength. | 03-22-2012 |
20120326926 | HIGH SENSITIVITY GPS/GNSS RECEIVER - The GPS/GNSS receiver and method disclosed herein improves the GPS/GNSS receiver tracking sensitivity for detecting low signal-to-noise (SNR) GPS/GNSS signals through improved vector tracking, multibit correlation, improved extended range code-phase discrimination, and discrimination and navigation filter measurement via Probabilistic Data Association, individually or in combination. The solution is achieved without any external data aiding, such as from an inertial measurement unit, other wireless infrastructure source, or communication of GPS/GNSS satellite vehicle (SV) subframe data to the GPS/GNSS receiver over a data link. | 12-27-2012 |