GLOBAL NAVIGATION SATELLITE SYSTEM RECEIVER SYSTEM WITH RADIO FREQUENCY HARDWARE COMPONENT

• US 20140292569A1
• Filed: 06/13/2014
• Published: 10/02/2014
• Est. Priority Date: 12/28/2012
• Status: Active Grant

• Current Assignee: Trimble Inc.
• Original Assignee: Trimble Navigation Limited (Trimble Inc.)
• Inventors: Loomis, Peter Van Wyck, Weisenburger, Shawn D., Janky, James M., Wallace, Gregory Craig
• Granted Patent: US 9,835,729 B2
• Time in Patent Office: Days
• US Class Current: 342/357.42
• CPC Class Codes: G01S 19/41 Differential correction, e.g. DGPS [differential GPS]
• CPC Class Codes: G01S 19/43 using carrier phase measurements, e.g. kinematic positioning; using long or short baseline interferometry

Abstract

A stand-alone radio frequency (RF) hardware component comprises first and second antennas, a digitizer, a serializer, and a serial output. The first antenna receives, over-the-air, a first analog Global Navigation Satellite System (GNSS) signal in a first frequency band. The second antenna receives, over-the-air, at least a second analog GNSS signal in a second frequency band, wherein the first frequency band and the second frequency band are separate and distinct. The digitizer digitizes the first analog GNSS signal into a first digitalized GNSS signal and digitizes the second analog GNSS signal into a second digitized GNSS signal. The serializer serializes the digitized GNSS signals into a serialized output signal. The serial output communicatively couples the digitized GNSS signals, as the serialized output signal, directly from the RF hardware component to a communication device that is removably couplable with the stand-alone RF hardware component.

Claims

1. A stand-alone radio frequency hardware component comprising:

a first antenna configured for receiving, over-the-air, a first analog Global Navigation Satellite System (GNSS) signal in a first frequency band;

a second antenna configured for receiving, over-the-air, at least a second analog GNSS signal in a second frequency band, wherein said first frequency band and said second frequency band are separate and distinct;

a digitizer configured for digitizing said first analog GNSS signal into a first digitalized GNSS signal and for digitizing said second analog GNSS signal into a second digitized GNSS signal;

a serializer configured for serializing said digitized GNSS signals into a serialized output signal; and

a serial output configured for communicatively coupling said digitized GNSS signals, as said serialized output signal, directly from said radio frequency hardware component to a communication device that is removably couplable with said stand-alone radio frequency hardware component.

2. The stand-alone radio frequency hardware component of claim 1, wherein said digitizer comprises:

a first Radio Frequency Integrated Circuit (RFIC) configured for digitizing said first analog GNSS signal into said first digital signal; and

a second RFIC configured for digitizing said at least said second analog GNSS signal into said second digital signal.

3. The stand-alone radio frequency hardware component of claim 1, wherein at least one of said first analog GNSS signal and said second analog GNSS signal is an L2C Global Positioning System (GPS) signal and the other of said first analog GNSS signal and said second analog GNSS signal is an L1 GPS signal.

4. The stand-alone radio frequency hardware component of claim 3, wherein:

said stand-alone radio frequency hardware component is further configured for receiving, over-the-air, an analog L1 Galileo signal in said second frequency band; and

said digitizer is further configured for digitizing said analog L1 Galileo signal into a third digitalized GNSS signal.

5. The stand-alone radio frequency hardware component of claim 3, further comprising:

said stand-alone radio frequency hardware component is further configured for receiving, over-the-air, an analog L1 BeiDou signal in said second frequency band; and

said digitizer is further configured for digitizing said analog L1 BeiDou signal into a third digitalized GNSS signal.

6. The stand-alone radio frequency hardware component of claim 3, further comprising:

said stand-alone radio frequency hardware component is further configured for receiving, over-the-air, an analog L1 Glonass signal in said second frequency band; and

said digitizer is further configured for digitizing said analog L1 Glonass signal into a third digitalized GNSS signal.

7. The stand-alone radio frequency hardware component of claim 3, further comprising:

a third antenna configured for receiving, over-the-air, an analog L1 pseudolite signal in said second frequency band, and wherein said digitizer is further configured for digitizing said analog L1 pseudolite signal into a third digitalized GNSS signal.

8. The stand-alone radio frequency hardware component of claim 3, further comprising:

a third antenna configured for receiving, over-the-air, an analog Satellite Based Augmentation System (SBAS) signal, and wherein said digitizer is further configured for digitizing said analog SBAS signal into a digitalized signal.

9. The stand-alone radio frequency hardware component of claim 3, further comprising:

a third antenna configured for receiving, an analog L5 GPS signal in a third frequency band that is separate and distinct from said first frequency band and from said second frequency band, and wherein said digitizer is further configured for digitizing said analog L5 GPS signal into a third digitalized GNSS signal.

10. A Global Navigation Satellite System (GNSS) receiver system comprising:

a radio frequency hardware component comprising;

a first antenna configured for receiving, over-the-air, a first analog GNSS signal in a first frequency band;

a second antenna configured for receiving, over-the-air, at least a second analog GNSS signal in a second frequency band, wherein said first frequency band and said second frequency band are separate and distinct;

a digitizer configured for digitizing said first analog GNSS signal into a first digitalized GNSS signal and for digitizing said second analog GNSS signal into a second digitized GNSS signal; and

a communication device configured to receive said digitized GNSS signals via a physical coupling with said radio frequency hardware component, said communication device comprising;

an internal GNSS receiver chipset; and

a processor, located outside of said internal GNSS receiver chipset, said processor configured for operating a software defined GNSS receiver to determine a position using at least first information obtained by said processor from said first digitized GNSS signal and second information obtained by said processor from said second digitized GNSS signal.

11. The GNSS receiver system of claim 10, wherein said radio frequency hardware component further comprises:

a serializer configured for serializing said digitized GNSS signals into a serialized output signal; and

wherein said radio frequency hardware component comprises a stand-alone radio frequency hardware component disposed proximate to and removably coupled with said communication device and is configured for communicatively coupling said digitized GNSS signals, as said serialized output signal, directly from said stand-alone radio frequency hardware component to said communication device via said physical coupling.

12. The GNSS receiver system of claim 10, wherein said digitizer comprises:

a first Radio Frequency Integrated Circuit (RFIC) configured for digitizing said first analog GNSS signal into said first digital signal; and

a second RFIC configured for digitizing said at least said second analog GNSS signal into said second digital signal.

13. The GNSS receiver system of claim 10, wherein at least one of said first analog GNSS signal and said second analog GNSS signal is an L2C Global Positioning System (GPS) signal and the other of said first analog GNSS signal and said second analog GNSS signal is an L1 GPS signal.

14. The GNSS receiver system of claim 13, wherein:

said radio frequency hardware component is further configured for receiving, over-the-air, an analog L1 Galileo signal in said second frequency band; and

said digitizer is further configured for digitizing said analog L1 Galileo signal into a third digitalized GNSS signal.

15. The GNSS receiver system of claim 13, wherein:

said radio frequency hardware component is further configured for receiving, over-the-air, an analog L1 BeiDou signal; and

said digitizer is further configured for digitizing said analog L1 BeiDou signal into a third digitalized GNSS signal.

16. The GNSS receiver system of claim 13, wherein:

said radio frequency hardware component is further configured for receiving, over-the-air, an analog L1 Glonass signal; and

said digitizer is further configured for digitizing said analog L1 Glonass signal into a third digitalized GNSS signal.

17. The GNSS receiver system of claim 13, wherein:

said radio frequency hardware component is further configured for receiving, over-the-air, an analog L1 pseudolite signal; and

said digitizer is further configured for digitizing said analog L1 pseudolite signal into a third digitalized GNSS signal.

18. The GNSS receiver system of claim 13, further comprising:

a third antenna configured for receiving, over-the-air, an analog L5 GPS signal in a third frequency band that is separate and distinct from said first frequency band and from said second frequency band; and

said digitizer is further configured for digitizing said analog L5 GPS signal into a third digitalized GNSS signal.

19. The GNSS receiver system of claim 10, wherein said processor comprises a processor selected from the list of processors consisting of:

a host processor of said communication device;

a microprocessor of said communication device, a graphics processing unit (GPU) of said communication device; and

a digital signal processor (DSP) of said communication device.

20. The GNSS receiver system of claim 10, wherein said communication device is selected from the list of communication devices consisting of:

a cellular telephone;

a tablet computer;

a two-way non-cellular radio;

a dedicated short range communication (DSRC) radio which complies with Institute of Electrical and Electronics Engineers (IEEE) 802.11p standards; and

a dedicated short range communication (DSRC) radio which is implemented as a software defined radio in compliance with IEEE 802.11p standards.

21. A method of position determination, said method comprising:

receiving, over-the-air with a first antenna of a radio frequency hardware component, a first analog Global Navigation Satellite System (GNSS) signal in a first frequency band;

receiving, over-the-air with a second antenna of said radio frequency hardware component, at least a second analog GNSS signal in a second frequency band, wherein said first frequency band and said second frequency band are separate and distinct;

digitizing said first analog GNSS signal into a first digitalized GNSS signal with a digitizer of said radio frequency hardware component;

digitizing said second analog GNSS signal into a second digitized GNSS signal with a said digitizer of said radio frequency hardware component;

receiving said digitized GNSS signals at a communication device located proximate to said radio frequency hardware component, said communication device comprising an internal GNSS receiver chipset; and

using a software defined GNSS receiver operating on a processor of said communication device to obtain first information from said first digitized GNSS signal, obtain second information from said second digitized GNSS signal, and determine a position using at least both of the first information and the second information, wherein the processor is located outside of the GNSS receiver chipset.

22. The method are recited in claim 21, further comprising:

receiving GNSS corrections at said communication device; and

utilizing said GNSS corrections in said software defined GNSS receiver as a portion performing said position determination.

23. The method as recited in claim 21, wherein said receiving, over-the-air with a first antenna of a radio frequency hardware component, a first analog GNSS signal in a first frequency band comprises receiving an analog L2C GPS signal;

and

wherein said receiving, over-the-air with a second antenna of said radio frequency hardware component, at least a second analog GNSS signal in a second frequency band comprises receiving an analog L1 GPS signal.

24. The method as recited in claim 23, further comprising:

receiving, over-the-air with said radio frequency hardware component, a third analog GNSS signal selected from the group consisting of;

an analog L1 Galileo signal;

an analog L1 BeiDou signal, an analog L1 Glonass signal;

an analog L5 GPS signal; and

an analog pseudolite transmitted GNSS signal;

digitizing said third analog GNSS signal into a third digitized GNSS signal with said digitizer of said radio frequency hardware component; and

using said software defined GNSS receiver to obtain third information from said third digitized GNSS signal and to employ said third information as a portion of performing said position determination.

25. The method as recited in claim 21, wherein said receiving said digitized GNSS signals at a communication device located proximate to said radio frequency hardware component comprises:

receiving a serial transmission of said digitized GNSS signals at said communication device located proximate to and removably coupled with said radio frequency hardware component, wherein said digitized GNSS signals are serialized into said serialized transmission by a serializer of said radio frequency hardware component.