System for standard positioning service and precise positioning service cooperative operation

• US 7,283,090 B2
• Filed: 12/24/2003
• Issued: 10/16/2007
• Est. Priority Date: 12/24/2003
• Status: Active Grant

• Current Assignee: Trimble Navigation Limited (Trimble Inc.)
• Original Assignee: Trimble Navigation Limited (Trimble Inc.)
• Inventors: Dentinger, Michael, Spratlin, Ken
• Primary Examiner(s): Tarcza; Thomas H.
• Assistant Examiner(s): Mull; Fred H
• Application Number:
  US10/745,829
• Publication Number:
  US 20050146459A1
• Time in Patent Office: 1,392 Days
• Field of Search: 342/357.01, 342/357.02, 342/357.06, 342/358, 701/200, 701/207, 701213-215
• US Class Current: 342/357.21
• CPC Class Codes: G01S 19/18 Military applications
• CPC Class Codes: G01S 19/20 Integrity monitoring, fault detection or fault isolation of space segment
• CPC Class Codes: G01S 19/215 issues related to spoofing
• CPC Class Codes: G01S 19/25 involving aiding data received from a cooperating element, e.g. assisted GPS
• CPC Class Codes: G01S 19/32 Multimode operation in a single same satellite system, e.g. GPS L1/L2
• CPC Class Codes: G01S 5/0072 Transmission between mobile stations, e.g. anti-collision systems

Abstract

A system for standard positioning service (SPS) and precise positioning service (PPS) cooperative operation is disclosed. In one embodiment, a PPS receiver is utilized to process a PPS data portion of a positioning signal. In addition, an SPS receiver is utilized to process an SPS data portion of the positioning signal. Furthermore, the PPS receiver and the SPS receiver are communicatively coupled such that the PPS data portion from the PPS receiver is cross-validated with the SPS data portion from the SPS receiver thereby corroborating the accuracy of the positioning signal.

Claims

1. A system for standard positioning service (SPS) and precise positioning service (PPS) cooperative operation comprising:

a PPS receiver to process a PPS data portion of a positioning signal;

an SPS receiver to process an SPS data portion of the positioning signal; and

a controller communicatively coupled with the PPS receiver and the SPS receiver such that the PPS data portion from the PPS receiver is exported to the controller and the functionality of the SPS receiver is exported to the controller.

2. The system as recited in claim 1 wherein after the PPS receiver and the SPS receiver are communicatively coupled with the controller and the PPS receiver has acquired the PPS positioning signal, the operational capabilities of the SPS receiver are functional regardless of the acquisition status of the SPS portion of the positioning signal by the SPS receiver.

3. The system as recited in claim 1 wherein after the SPS receiver acquires the SPS data portion of the positioning signal a cross-validation of the PPS data portion from the PPS receiver with the SPS data portion from the SPS receiver is performed by the controller.

4. The system of claim 3, wherein the cross-validation of the PPS data portion and the SPS data portion provides information about the accuracy of the positioning signal.

5. The system of claim 3 wherein during the cross-validating of the PPS data portion with the SPS data portion, the PPS data portion is selected as the correct data portion if the cross-validation does not result in corroboration of the accuracy of the positioning signal.

6. The system of claim 1 wherein the SPS data portion of the positioning signal is C/A code on an L1 band and the PPS data portion of the positioning signal is P-code or encoded Y-code on the L1 band or an L2 band.

7. The system of claim 1 wherein the PPS receiver includes a KDP (key data processor) adapted to receive a CV (crypto variable) from an external keying device, the KDP operable for generating Crypto Variable Anti Spoofing (Cvas) and selective availability (SA) correction information.

8. The system of claim 1 wherein the controller utilizes the PPS data portion from the PPS receiver to assist the SPS receiver in acquiring the SPS data portion of the positioning signal.

9. The system of claim 1 wherein the controller receives a portion of the SPS data portion and utilizes the portion of the SPS data portion to assist the PPS receiver in acquiring the PPS data portion of the positioning signal.

10. The system of claim 9 wherein the PPS receiver includes a KDP (key data processor) adapted to receive a CV (Crypto Variable) from an external keying device, the KDP operable for generating Crypto Variable Anti Spoofing (Cvas) and selective availability (SA) correction information.

11. The system of claim 9 wherein both the PPS receiver and the SPS receiver utilize a single antenna to acquire the PPS and SPS data portions of the positioning signal.

12. A system for standard positioning service (SPS) and precise positioning service (PPS) cooperative operation comprising:

an SPS receiver for processing an SPS data portion of a positioning signal, said SPS receiver comprising;

an operational portion; and

a data collection portion; and

a PPS receiver for processing a PPS data portion of a positioning signal;

wherein the PPS receiver removably couples with the data collection portion of the SPS receiver thereby communicatively coupling the PPS receiver and the SPS receiver such that the operational capabilities of the SPS receiver are enhanced by the accuracy of the PPS receiver.

13. The system as recited in claim 12 wherein the PPS data portion from the PPS receiver is cross-validated with the SPS data portion from the SPS receiver to provide information about the accuracy of the positioning signal.

14. The system of claim 13 wherein during the cross-validating of the PPS data portion with the SPS data portion, the PPS data portion is selected as the correct data portion if the cross-validation does not result in corroboration of the accuracy of the positioning signal.

15. The system of claim 12 wherein the SPS data portion of the positioning signal is C/A code on an L1 band and the PPS data portion of the positioning signal is P-code or encoded Y-code on the L1 band or an L2 band.

16. The system of claim 12 wherein the PPS receiver is a standard form factor interface.

17. The system of claim 16 wherein the standard form factor interface is a personal computer memory card interface architecture (PCMCIA card).