Communications: directive radio wave systems and devices (e.g. – Directive – Including a satellite
Reexamination Certificate
2007-10-23
2007-10-23
Tarcza, Thomas H. (Department: 3662)
Communications: directive radio wave systems and devices (e.g.,
Directive
Including a satellite
C342S357490, C701S207000, C701S213000
Reexamination Certificate
active
11304470
ABSTRACT:
A method for improving fault detection and exclusion of a GPS receiver is provided. The method determines pseudorange measurement residuals of tracked signals, divides the signals into two groups based on whether each signal has a higher or lower probability of being a failure, and estimates a residual bias using only the lower probability group of signals. The method further removes the residual bias from all calculated residuals, and compares each range residual to one of three different thresholds. A tighter threshold is applied to positive residuals of the group of signals with higher failure probability than to the group of signals with lower failure probability. A further tighter threshold is applied to negative residuals of the group of signals having higher failure probability. The method then determines PVT values of the GPS receiver utilizing range measurements of signals whose measurement residual magnitudes are less than their corresponding threshold values.
REFERENCES:
patent: 6166683 (2000-12-01), Hwang
patent: 6411892 (2002-06-01), van Diggelen
patent: 6799116 (2004-09-01), Robbins
patent: 2005/0052319 (2005-03-01), Hatch et al.
patent: 2006/0074558 (2006-04-01), Williamson et al.
patent: 2007/0096977 (2007-05-01), Lillo et al.
patent: 2007/0139263 (2007-06-01), Xie et al.
Jambulingam Shreeram
Xie Gang
Hughes Terri S.
Liu Harry
Motorola Inc.
Tarcza Thomas H.
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