GPS signal repeater and GPS receiver of stationary orbit satellite, and method for positioning stationary orbit satellite using the same

• US 20070159382A1
• Filed: 11/16/2006
• Published: 07/12/2007
• Est. Priority Date: 11/16/2005
• Status: Active Grant

• Current Assignee: Electronics and Telecommunications Research Institute
• Original Assignee: Electronics and Telecommunications Research Institute
• Inventors: Kim, Jae-Hoon, Joo, In-One, Lee, Jeom-Hun
• Granted Patent: US 7,456,783 B2
• Time in Patent Office: Days
• US Class Current: 342/353
• CPC Class Codes: G01S 19/11 wherein the cooperating elements are pseudolites or satellite radio beacon positioning system signal repeaters
• CPC Class Codes: G01S 19/14 specially adapted for specific applications

Abstract

Provided is a Global Positioning System (GPS) signal repeater and a GPS receiver of a stationary orbit satellite, and a method for positioning a stationary orbit satellite using the same. The GPS signal repeater includes: a GPS receiver for receiving an L-band GPS signal transmitted from a GPS satellite; a low-noise amplifier for removing noise of the received L-band GPS signal and maximally amplifying a desired signal; a frequency transformer for transforming the amplified L-band GPS signal into an up-link frequency band; a high power amplifier for amplifying the transformed up-link frequency band GPS signal; and a transmitter for transmitting the amplified signal to a stationary orbit satellite.

Claims

1. A Global Positioning System (GPS) signal repeater, comprising:

a GPS receiving means for receiving an L-band GPS signal transmitted from a GPS satellite;

a low-noise amplifying means for removing noise from the received L-band GPS signal and maximally amplifying a desired signal;

a frequency transform means for transforming the amplified L-band GPS signal into an up-link frequency band;

a high power amplifying means for amplifying the transformed up-link frequency band GPS signal; and

a transmitting means for transmitting the amplified signal to a stationary orbit satellite.

2. The GPS signal repeater as recited in claim 1, wherein since the unique position of the GPS signal repeater is recognized through the uniquely allocated up-link frequency band signal, the frequency transform means is set up to transform the L-band GPS signal into the up-link frequency band uniquely allocated in the GPS signal repeater.

3. A Global Positioning System (GPS) receiver of a stationary orbit satellite, comprising:

a low-noise amplifying means for removing noise from the up-link frequency band GPS signal transmitted from the stationary orbit satellite and maximally amplifying a desired signal;

a frequency band dividing means for dividing the amplified signal into a plurality of signals each having a unique frequency bands;

a GPS signal creating means for creating the divided signals as L-band GPS signals; and

a position calculating means for selecting a GPS satellite among the L-band GPS signals and calculating a position of a stationary orbit satellite based on information on the GPS satellites and radio wave time of flight of the GPS satellites.

4. The GPS receiver as recited in claim 3, wherein when the up-link frequency band GPS signal from the GPS satellite through the GPS repeater is received, the position calculating means removes information on a distance from the GPS satellite to the GPS repeater and calculates only a distance from the GPS repeater to the stationary orbit satellite.

5. A method for positioning a stationary orbit satellite by receiving a Global Positioning System (GPS) signal from a GPS signal repeater in a GPS receiver of the stationary orbit satellite, comprising:

a) transforming an L-band GPS signal transmitted from a GPS satellite into an up-link frequency band signal, and transmitting the L-band GPS signal to the stationary orbit satellite based on allocated frequency band; and

b) creating the received up-link frequency band GPS signal as the L-band GPS signal, selecting only one GPS satellite based on the created L-band GPS signal, and calculating a position of the stationary orbit satellite based on information on a plurality of GPS satellites and a radio wave time of flight of the GPS satellites,

wherein a GPS signal repeater, comprises;

a GPS receiver for receiving an L-band GPS signal transmitted from a GPS satellite;

a low-noise amplifier for removing noise of the received L-band GPS signal and maximally amplifying a desired signal;

a frequency transformer for transforming the amplified L-band GPS signal into an up-link frequency band;

a high power amplifier for amplifying the transformed up-link frequency band GPS signal; and

a transmitter for transmitting the amplified signal to a stationary orbit satellite, and a GPS receiver of a stationary orbit satellite, comprises;

a low-noise amplifier for removing noise of the up-link frequency band GPS signal transmitted from the stationary orbit satellite and maximally amplifying a desired signal;

a frequency band divider for dividing the amplified signal into a plurality of unique frequency bands;

a GPS signal creator for creating a plurality of divided signals as a L-band GPS signal; and

a position calculator for selecting a GPS satellite among a plurality of L-band GPS signals and calculating a position of a stationary orbit satellite based on information on a plurality of GPS satellites and a radio wave time of flight of the GPS satellites.

6. The method as recited in claim 5, wherein the up-link frequency band GPS signal avoids signal interference by using the allocated frequency band for communication with the satellite except the frequency band of the L-band GPS signal.

7. The method as recited in claim 5, wherein at least 4 GPS signal repeaters are installed on the ground in an identical structure to easily figure out a route of an electric wave and a GPS signal repeater through which the up-link frequency band GPS signal is transmitted.

8. The method as recited in claim 7, wherein since the positions of at least 4 GPS signal repeaters installed on the ground are acquired, the GPS receiver of the stationary orbit satellite calculates a position of the GPS receiver by removing information on a distance from the GPS satellite to the GPS signal repeater, and calculating only a distance from the GPS signal repeater to the stationary orbit satellite.