Apparatus and method for receiving position and control signals by a mobile machine
First Claim
1. An apparatus for receiving position and command signals by a mobile machine, comprising:
- a base station adapted to receive GPS signals, and transmit at least one of a DGPS signal and a command signal;
a pseudolite adapted to receive the at least one of a DGPS signal and a command signal and transmit a combined pseudo-GPS signal and the at least one of a DGPS signal and a command signal, wherein the at least one of a DGPS signal and a command signal is combined with the pseudo-GPS signal by inserting the at least one of a DGPS signal and a command signal between at least two adjacent sideband frequency components of the pseudo-GPS signal;
a GPS receiver located on the mobile machine adapted to receive GPS signals, and the combined signals from the pseudolite;
a machine position processor located on the mobile machine adapted to receive the GPS, pseudo-GPS, and DGPS signals from the GPS receiver and responsively generate a machine position signal;
a machine control processor located on the mobile machine adapted to receive the command signals from the GPS receiver and responsively generate a machine control signal; and
a machine navigator located on the mobile machine adapted to receive the machine position signal from the machine position processor and the machine control signal from the machine control processor.
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Accused Products
Abstract
A base station receives GPS signals from GPS satellites and transmits a combined differential GPS (DGPS) signal and a command signal. At least one pseudolite receives the DGPS and command signals and combines the DGPS and command signals with a pseudo-GPS signal. A GPS receiver on a mobile machine receives GPS signals from GPS satellites, and the combined signal from the pseudolite. The position signals are delivered to a machine position processor to generate a machine position signal. The command signals are delivered to a machine control processor to generate a machine control signal. The machine position signal and the machine control signal are delivered to a machine navigator to control the mobile machine.
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Citations
28 Claims
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1. An apparatus for receiving position and command signals by a mobile machine, comprising:
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a base station adapted to receive GPS signals, and transmit at least one of a DGPS signal and a command signal; a pseudolite adapted to receive the at least one of a DGPS signal and a command signal and transmit a combined pseudo-GPS signal and the at least one of a DGPS signal and a command signal, wherein the at least one of a DGPS signal and a command signal is combined with the pseudo-GPS signal by inserting the at least one of a DGPS signal and a command signal between at least two adjacent sideband frequency components of the pseudo-GPS signal; a GPS receiver located on the mobile machine adapted to receive GPS signals, and the combined signals from the pseudolite; a machine position processor located on the mobile machine adapted to receive the GPS, pseudo-GPS, and DGPS signals from the GPS receiver and responsively generate a machine position signal; a machine control processor located on the mobile machine adapted to receive the command signals from the GPS receiver and responsively generate a machine control signal; and a machine navigator located on the mobile machine adapted to receive the machine position signal from the machine position processor and the machine control signal from the machine control processor. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A method for receiving position and command signals by a mobile machine, including the steps of:
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receiving a plurality of GPS signals by a base station; transmitting at least one of a DGPS signal and a command signal from the base station; receiving the at least one of a DGPS signal and a command signal by a pseudolite; transmitting a combined pseudo-GPS signal and the at least one of a DGPS signal and a command signal from the pseudolite, wherein the at least one of a DGPS signal and a command signal is combined with the pseudo-GPS signal by inserting the at least one of a DGPS signal and a command signal between at least two adjacent sideband frequency components of the pseudo-GPS signal; receiving a plurality of GPS signals and the combined signals from the pseudolite by a GPS receiver located on the mobile machine; delivering the plurality of GPS signals, the pseudo-GPS signal, and the DGPS signal to a machine position processor and responsively generating a machine position signal; delivering the command signal to a machine control processor and responsively generating a machine control signal; and delivering the machine position signal and the machine control signal to a machine navigator located on the mobile machine. - View Dependent Claims (14, 15, 16, 17, 18, 19)
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20. A system for communicating position and command signals to a mobile machine, comprising:
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a base station adapted to receive a plurality of GPS signals from a corresponding plurality of GPS satellites, and to transmit at least one of a DGPS signal and a command signal; at least one pseudolite located at predetermined positions at a site, each of the at least one pseudolite adapted to receive the at least one of a DGPS signal and a command signal from the base station, and to transmit a combined pseudo-GPS signal and the at least one of a DGPS signal and a command signal, wherein the at least one of a DGPS signal and a command signal is combined with the pseudo-GPS signal by inserting the at least one of a DGPS signal and a command signal between at least two adjacent sideband frequency components of the pseudo-GPS signal; a GPS receiver located on the mobile machine adapted to receive the plurality of GPS signals from the corresponding plurality of GPS satellites and the combined signal from one of the at least one pseudolite; a machine position processor located on the mobile machine adapted to receive the GPS, pseudo-GPS, and DGPS signals from the GPS receiver and responsively generate a machine position signal; a machine control processor located on the mobile machine adapted to receive the command signal from the GPS receiver and responsively generate a machine control signal; and a machine navigator located on the mobile machine adapted to receive the machine position signal and the machine control signal and responsively control the mobile machine. - View Dependent Claims (21, 22, 23, 24, 25, 26, 27, 28)
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Specification