IP Library Granted Patent US 8,559,468
Granted Patent B2
US 8,559,468 · App. 13/111,883 · Granted Oct 15, 2013

Combining a GPS carrier with existing communication carriers over a common coaxial connection

Inventors: Michael Beeler (Jefferson, MD); Cris Mamaril (Mesa, AZ); Jeffery Harig (Mesa, AZ)
Assignee: Comtech EF Data Corp.
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Quick Facts
Patent No.
US 8,559,468
App. No.
13/111,883
Granted
Oct 15, 2013
Kind
B2
Abstract

A method of combining a GPS carrier signal and a communication carrier signal over a common coaxial connection, the method comprising receiving a GPS carrier signal into a signal system using an antenna, which system is configured to receive a non-GPS communication carrier signal from a communication system, processing the GPS carrier signal with the signal communication system to produce a modified GPS carrier signal, the processing comprising at least: filtering the modified GPS carrier signal using a filter, and amplifying the GPS carrier signal using an amplifier; filtering, using a filter, and power combining using a power combiner, the GPS carrier signal and the non-GPS communication carrier signal, and transmitting, using a single coaxial cable, the combined GPS carrier and non-GPS communication carrier signals to a communication device.

Claims (55)

1. A method of combining a GPS carrier signal and a non-GPS communication carrier signal over a common coaxial connection, the method comprising:

receiving a GPS carrier signal into a signal system using an antenna, which system is configured to receive a non-GPS communication carrier signal from a communication system;

processing the GPS carrier signal with the communication system to produce a modified frequency translated GPS carrier signal, the processing comprising at least:

preventing the GPS carrier signal from interfering with native operating frequencies on the coaxial cable by moving the frequency of the received GPS carrier signal using a mixer and a local oscillator;

filtering the modified frequency translated GPS carrier signal using a filter; and

amplifying the modified frequency translated GPS carrier signal using an amplifier;

filtering, using a filter, and power combining using a power combiner, the modified frequency translated GPS carrier signal and the non-GPS communication carrier signal; and

transmitting, using a single coaxial cable, the combined modified frequency translated GPS carrier and non-GPS communication carrier signals to a receiving device.

2. The method of claim 1 , wherein if the GPS carrier signal is within a passband of the non-GPS communication carrier signal, processing the GPS carrier signal comprises moving a frequency of the GPS carrier signal from the passband to a frequency that is outside the passband of the non-GPS communication carrier signal and at least one other carrier signal previously transmitted or received on the single coaxial cable.

3. The method of claim 1 , wherein the filtering, amplifying and power combining occur within an outdoor electronics device.

4. The method of claim 1 , wherein the antenna is an active antenna.

5. The method of claim 1 , wherein the antenna is a passive antenna.

6. The method of claim 1 , wherein the filtering and power combining occur external to a communications device and inline with an existing coaxial cable.

7. The method of claim 1 , further comprising limiting an input frequency spectrum using a filter.

8. The method of claim 1 , further comprising increasing a power level of the received GPS carrier signal using an amplifier.

9. The method of claim 1 , further comprising removing an undesired mixing product from the modified frequency translated GPS carrier signal using a filter.

10. A method of receiving a non-GPS communication carrier signal that has been multiplexed with a GPS carrier signal over a coaxial cable, the method comprising:

transmitting or receiving, by a communication device and through a single coaxial cable, a combined communication signal comprising a GPS carrier signal and a non-GPS communication carrier signal;

power splitting, using a power splitter, the combined communication signal resulting in separation of a discrete GPS carrier signal component and a discrete non-GPS communication carrier signal component;

moving the frequency of the GPS carrier signal component to a new frequency using a mixer and local oscillator;

routing the GPS carrier signal component to a GPS receiving device; and

routing the non-GPS communication carrier signal component to an indoor electronics device for demodulation and processing.

11. The method of claim 10 , further comprising isolating an input spectrum of the combined communication signal to create the discrete GPS carrier signal component and the discrete non-GPS communication carrier signal component using a filter.

12. The method of claim 10 , wherein the frequency of the received GPS carrier signal component is previously unmodified.

13. The method of claim 10 , further comprising demodulating and processing the GPS carrier signal component by the GPS receiving device.

14. The method of claim 10 , further comprising moving the frequency of the GPS carrier signal component to a frequency that is outside a passband of carrier signals already on the single coaxial cable using a mixer and a local oscillator.

15. The method of claim 14 , further comprising demodulating and processing the GPS carrier signal by the GPS receiving device.

16. The method of claim 10 , further comprising removing an undesired mixing product from the frequency altered GPS carrier signal component.

17. A system for combining a GPS carrier signal and a non-GPS communication carrier signal over a common coaxial connection, the system comprising:

an antenna coupled to a receiver of a signal communication system configured to receive a non-GPS communication carrier signal, the communication system further configured to receive a GPS carrier signal;

a local oscillator configured to prevent the GPS carrier signal from interfering with native operating frequencies on the coaxial cable by moving the frequency of the received GPS carrier signal;

a filter configured to filter the GPS carrier signal;

an amplifier configured to improve the GPS carrier signal power;

a filter and power combiner configured to power combine the GPS carrier signal and the non-GPS communication carrier signal; and

a transmitter configured to transmit the combined GPS carrier and non-GPS communication carrier signals to a communication device through a single coaxial cable.

18. The system of claim 17 , further comprising a mixer and a local oscillator configured to move a frequency of the GPS carrier signal to a frequency that is outside a passband of carrier signals, including the non-GPS communication carrier signal, already transmitted on the single coaxial cable if the GPS carrier signal is within the passband of the carrier signals already transmitted on the single coaxial cable.

19. The system of claim 17 , further comprising an outdoor electronics device within which the filter is located.

20. The system of claim 17 , wherein the antenna is an active antenna.

21. The system of claim 17 , wherein the antenna is a passive antenna.

22. The system of claim 17 , further comprising a device external to the outdoor electronics device within which the filter is located, wherein the device is located inline with an existing coaxial cable.

23. The system of claim 17 , further comprising a filter configured to limit an input frequency spectrum using a filter.

24. The system of claim 17 , further comprising an amplifier that increases a power level of the received GPS carrier signal.

25. The system of claim 17 , further comprising a filter configured to remove an undesired mixing product from the frequency altered GPS carrier signal.

26. A system for transmitting and/or receiving a non-GPS communication carrier signal that has been multiplexed with a GPS carrier signal over a coaxial cable, the system comprising:

a mixer and a local oscillator configured to move a frequency of a GPS carrier signal component to a new frequency;

a communication device configured to communicate a combined communication signal through a single coaxial cable, the combined communications signal comprising the GPS carrier signal component and a non-GPS communication carrier signal component;

a power splitter configured to power split the combined communication signal resulting in separation of the GPS carrier signal component and the non-GPS communication carrier signal component;

a GPS receiving device configured to receive the separated GPS carrier signal component; and

an indoor electronics unit configured to receive, demodulate, and process the separated non-GPS communication carrier signal component.

27. The system of claim 26 , further comprising a filter configured to isolate an input spectrum of the combined communication signal to create the separated GPS carrier signal component and non-GPS communication carrier signal component.

28. The system of claim 26 , wherein the frequency of the received GPS carrier signal is previously unmodified.

29. The system of claim 26 , wherein the GPS receiving device is further configured to demodulating and processing the GPS carrier signal component.

30. The system of claim 26 , wherein the mixer and the local oscillator are further configured to move the frequency of the GPS carrier signal component to a frequency that is outside a passband of carrier signals already on the single coaxial connection.

31. The system of claim 26 , wherein the GPS receiving device is further configured to demodulate and process the GPS carrier signal component.

32. The system of claim 26 , wherein the mixer is further configured to remove an undesired mixing product from the frequency altered GPS carrier signal component.

Assignments (5)
RELEASE OF SECURITY INTEREST IN PATENTS AT REEL 037993/FRAME 0001 Recorded Jun 19, 2024
From: CITIBANK, N.A., AS ADMINISTRATIVE AGENT
To: COMTECH TELECOMMUNICATIONS CORP.; COMTECH EF DATA CORP.; COMTECH MOBILE DATACOM LLC; COMTECH SATELLITE NETWORK TECHNOLOGIES, INC.; COMTECH SYSTEMS, INC.; COMTECH XICOM TECHNOLOGY, INC.; MAPLE ACQUISITION LLC; TELECOMMUNICATION SYSTEMS, INC.
Reel/Frame 067780/0566 →
SECURITY INTEREST Recorded Jun 18, 2024
From: COMTECH SATELLITE NETWORK TECHNOLOGIES, INC.
To: TCW ASSET MANAGEMENT COMPANY LLC, AS AGENT
Reel/Frame 067756/0148 →
MERGER AND CHANGE OF NAME Recorded Apr 23, 2024
From: COMTECH EF DATA CORP.; COMTECH XICOM TECHNOLOGY, INC.; COMTECH SATELLITE NETWORK TECHNOLOGIES, INC.
To: COMTECH SATELLITE NETWORK TECHNOLOGIES, INC.
Reel/Frame 067187/0384 →
SECURITY AGREEMENT Recorded Mar 3, 2016
From: COMTECH EF DATA CORP.; COMTECH XICOM TECHNOLOGY, INC.; COMTECH MOBILE DATACOM CORPORATION; TELECOMMUNICATION SYSTEMS, INC.
To: CITIBANK N.A., AS ADMINISTRATIVE AGENT
Reel/Frame 037993/0001 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded May 19, 2011
From: BEELER, MICHAEL; MAMARIL, CRIS; HARIG, JEFFERY
To: COMTECH EF DATA CORP.
Reel/Frame 026312/0793 →
Continuity (2)
Provisional Application 61390576 · Oct 6, 2010
Related Publication 20110228817A1 · Sep 22, 2011