Satellite distributed television

• US 6,486,907 B1
• Filed: 07/23/1997
• Issued: 11/26/2002
• Est. Priority Date: 01/07/1997
• Status: Expired due to Fees

• Current Assignee: Foxcom, Ltd. (Global Invacom Group Ltd.)
• Original Assignee: Foxcom, Ltd. (Global Invacom Group Ltd.)
• Inventors: Alon, Mor, Farber, Allan, Loboda, Howard
• Primary Examiner(s): GRANT, CHRISTOPHER C
• Application Number:
  US08/899,452
• Time in Patent Office: 1,952 Days
• Field of Search: 345/327, 348/6-12, 348/13, 348/725, 455/3.1, 455/3.2, 455/4.1, 455/4.2, 455/6.1, 455/6.2
• US Class Current: 725/78
• CPC Class Codes: H04H 40/90 specially adapted for satellite broadcast receiving
• CPC Class Codes: H04N 21/2143 located in a single building, e.g. hotel, hospital or museum arrangements specially adapted for plural spots in a confined site in broadcast systems H04H20/63; adaptations for transmission by electric cable for domestic distribution in television systems H04N7/106
• CPC Class Codes: H04N 21/2221 being a cable television head-end CATV in broadcast systems H04H20/78
• CPC Class Codes: H04N 21/40 Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
• CPC Class Codes: H04N 7/106 for domestic distribution
• CPC Class Codes: H04N 7/17309 Transmission or handling of upstream communications
• CPC Class Codes: H04N 7/20 Adaptations for transmission via a GHz frequency band, e.g. via satellite
• CPC Class Codes: H04N 7/22 Adaptations for optical transmission

Abstract

A satellite signal distribution system including a headend which includes a fiberoptic transmitter that combines satellite signals from a satellite antenna with non-satellite television signals, a plurality of signal receive and distribution units, a plurality of optical fiber links which communicate the combined satellite and non-satellite signals between the headend and the plurality of signal receive and distribution units, and a multiplicity of signal links which communicate signals between each of the plurality of signal receive and distribution units and a plurality of satellite signal receivers and non-satellite signal receivers.

Claims

1. A satellite signal distribution system comprising:

a headend which receives satellite signals from a satellite antenna and directly converts them to optical signals without further modulation;

a plurality of satellite signal receive and distribution units;

a plurality of optical fiber links which communicate said optical signals between the headend and the plurality of satellite signal receive and distribution units; and

a multiplicity of satellite signal links which communicate satellite signals between each of said plurality of satellite signal receive and distribution units and plural satellite receivers.

2. A system according to claim 1 wherein said plurality of optical fiber links communicate said satellite signals between the headend and the plurality of satellite signal receive and distribution units serially.

3. A system according to claim 1 and also comprising a satellite antenna which is coupled to the headend.

4. A system according to claim 2 and also comprising a satellite antenna which is coupled to the headend.

5. A system according to claim 1 and also comprising a plurality of satellite receivers which are coupled to at least some of the multiplicity of satellite signal links.

6. A system according to claim 2 and also comprising a plurality of satellite receivers which are coupled to at least some of the multiplicity of satellite signal links.

7. A system according to claim 1 and wherein said headend, said plurality of satellite signal receive and distribution units, said plurality of optical fiber links and said multiplicity of satellite signal links all carry satellite signals in a 1-2.2 GHz frequency range.

8. A system according to claim 1 wherein said satellite receive and distribution units comprise a diplexer which outputs to a single coaxial cable a combination of said satellite signals and non-satellite television signals.

9. A system according to claim 8 wherein said diplexer provides a low frequency return path signal from a user to a source of said non-satellite television signal.

10. A system according to claim 1 wherein said satellite receive and distribution units comprise apparatus for receiving optical signals and converting to RF signals.

11. A system according to claim 1 wherein said satellite receive and distribution units comprise apparatus for equalizing any frequency tilt caused by a coaxial cable connection to a satellite receiver.

12. A system according to claim 1 wherein said satellite receive and distribution units comprise a splitter for splitting a signal into a number of outputs.

13. A system according to claim 1 wherein said satellite receive and distribution units comprise an interface to a satellite receiver.

14. A system according to claim 1 and comprising a coaxial cable connection to a satellite receiver wherein a single coaxial cable carries a signal having more than one polarity, one of the polarities being upconverted to a higher frequency band than another polarity.

15. A satellite signal distribution system comprising:

a fiberoptic transmitter that combines satellite signals from a satellite antenna with non-satellite television signals and directly converts them to optical signals without further modulation;

a plurality of signal receive and distribution units;

a plurality of optical fiber links which communicate said optical signals between said fiberoptic transmitter and said plurality of signal receive and distribution units; and

a multiplicity of signal links which communicate signals between each of said plurality of signal receive and distribution units and a plurality of satellite signal receivers and non-satellite signal receivers.

16. A system according to claim 15 and wherein said fiberoptic transmitter comprises a laser that converts said combined satellite signals and said non-satellite television signals into optical signals.

17. A system according to claim 16 and comprising a photodiode that converts said optical signals into electrical signals.

18. A system according to claim 17 wherein each of said plurality of signal receive and distribution units comprises said photodiode.

19. A system according to claim 17 and comprising a splitter for feeding said electrical satellite signals and said non-satellite television signals to a satellite receiver and to at least one of a television set and a CATV receiver, respectively.

20. A system according to claim 17 and comprising a plurality of a pair of splitters in communication with said photodiode, each said pair comprising a splitter for satellite signals and a splitter for non-satellite television signals, wherein a plurality of diplexers combines an output of each said pair of said splitters for feeding said satellite signals and said non-satellite television signals to a satellite receiver and to at least one of a television set and a CATV receiver, respectively.

21. A system according to claim 17 and comprising a non-satellite television return path for sending a return signal from a user to a source of a non-satellite television signal.

22. A system according to claim 21 wherein said return signal is sent on separate fibers.

23. A system according to claim 21 wherein said return signal is sent on a fiber by means of a wavelength division multiplexer.