Position And Motion Informed Navigation System

摘要

A global positioning system (GPS) receiver and system for determining a geographical location associated with the GPS receiver using less than four GPS signals. The system can comprise a constraint module configured to receive one or more constraints that describe at least one characteristic of a GPS receiver when a number of GPS satellites within a line of sight to the GPS receiver is below a defined value. The system can further comprise a pseudo range calculation module configured to calculate a plurality of pseudo ranges between the GPS receiver and the number GPS satellites, wherein the plurality of pseudo ranges are to various orbital positions of the GPS satellites over a period of time; and a geographical location module configured to determine the geographical location of the GPS receiver using the plurality of pseudo ranges and known constraints of motion associated with the GPS receiver.

主权项

1. A GPS receiver having computer circuitry configured to:
receive a number of global positioning system (GPS) signals from one or more GPS satellites; receive one or more constraints that describe at least one characteristic of the GPS receiver's motion or position when the number of GPS signals are below a defined value, wherein the one or more constraints enable a determination of a geographical location associated with the GPS receiver using the number of GPS signals from the one or more GPS satellites; calculate a plurality of pseudo ranges between the GPS receiver and the one or more GPS satellites at various orbital positions of the GPS satellites over a period of time; and determine the geographical location of the GPS receiver using the plurality of pseudo ranges and known correlations with respect to previous geographical locations associated with the GPS receiver.