| Entries |
| Document | Title | Date |
|---|
| 20100271259 | Methods and Systems to Diminish False-Alarm Rates in Multi-Hypothesis Signal Detection Through Combinatoric Navigation - Methods and systems to detect navigation signals, including to identify up to multiple range-Doppler hypotheses from each of j range-Doppler correlation grids based on a relatively low first threshold, generate navigation solutions from combinatorial sets of k of the identified hypotheses, evaluate the navigation solutions to identify plausible solutions, iteratively and combinatorially augment the plausible solutions with additional hypotheses from grids that are not represented in the corresponding k-hypotheses-based navigation solutions, replace plausible solutions with corresponding augmented plausible solutions when appropriate, and select one of a plurality of plausible solutions as a best plausible solution. Where a grid energy peak exceeds a second threshold, a corresponding hypothesis may be identified as a sole hypothesis for the corresponding navigation signal. The relatively low first threshold permits detection of weaker signals. Subsequent evaluations effectively transform a per-navigation-signal false alarm rate to per-navigation-solution false alarm rate. | 10-28-2010 |
| 20110210886 | METHOD AND SYSTEM FOR MAINTAINING A GNSS RECEIVER IN A HOT-STATE - A GNSS receiver in a wake up state during a standby mode may acquire ephemeris from received GNSS signals such as GPS signals and/or GLONASS signals. When subsequently transitioning from the standby mode to a normal mode operating at a high frequency clock, the acquired ephemeris may be utilized to generate a navigation solution for the GNSS receiver. The GNSS receiver in the wake up state during the standby mode may be switched to operate at the high frequency clock in order to receive GNSS signals. The GNSS receiver may extract complete ephemeris from the received GNSS signals, and may subsequently transition from the wake up state to a sleep state during the standby mode to save power. Radio frequency front-end components of the GNSS receiver may only be turned on to receive the GNSS signals. The GNSS receiver may transition between the standby mode and the normal mode. | 09-01-2011 |
| 20110291880 | APPARATUS AND METHOD FOR COLLECTING NAVIGATION DATA - An apparatus and a method for collecting navigation data are disclosed, where the apparatus includes a correlator, a first buffer, a first calculating unit and a management unit. The correlator can generate a plurality of power bits based on navigation data of a satellite. The first buffer can store a sequence of power bits from the correlator before bit synchronization is completed. The first calculating unit can generate at least one first data bit of a subframe based on the sequence of power bits. The management unit can integrate the at least one first data bit with other data bits of the subframe, so as to constitute the subframe completely. | 12-01-2011 |
| 20140070987 | PSUEDO MAXIMUM LIKELIHOOD TRACKING FOR GLOBAL NAVIGATION SATELLITE SYSTEMS - GNSS receivers and methods of determining a current receiver state of a GNSS receiver are provided. The method includes receiving positioning signals from a plurality of satellites; generating a plurality of correlation grids from the received positioning signals, where each correlation grid is associated with a respective one of the plurality of satellites; estimating a probability distribution of the current receiver state from the plurality of correlation grids; and determining a maximum likelihood estimate of the current receiver state from the estimated probability distribution. | 03-13-2014 |
| 20150097722 | APPARATUS AND METHOD FOR RECEIVING NAVIGATION SIGNAL - An apparatus for receiving a navigation signal receives a plurality of navigation signals having different available frequency bandwidths, selects a navigation signal in a band in which signal disturbance does not occur among the plurality of navigation signals, and calculates a navigation solution. | 04-09-2015 |
