Aggregated distribution of multiple satellite transponder signals from a satellite dish antenna

• US 6,441,797 B1
• Filed: 09/29/2000
• Issued: 08/27/2002
• Est. Priority Date: 09/29/2000
• Status: Expired due to Term

• Current Assignee: DIRECTV, LLC (AT&T, Inc.)
• Original Assignee: Hughes Electronics Corporation (Rtx Corporation)
• Inventors: Shah, Dipak M.
• Primary Examiner(s): Ho, Tan
• Application Number:
  US09/675,526
• Time in Patent Office: 697 Days
• Field of Search: 343/840, 343/850, 343/786, 343/876, 343/912, 343/781.R, 455/3.02, 455/3.04, 455/277.1, 455/280, 455/293, 455/428, 348/20
• US Class Current: 343/840
• CPC Class Codes: H01Q 1/247 with frequency mixer, e.g. for direct satellite reception or Doppler radar
• CPC Class Codes: H01Q 19/12 wherein the surfaces are concave H01Q19/18 takes precedence
• CPC Class Codes: H01Q 25/007 using two or more primary active elements in the focal region of a focusing device for operation on different wavebands H01Q5/22
• CPC Class Codes: H01Q 3/2658 Phased-array fed focussing structure

Abstract

An Out Door Unit (ODU) provides the capability to aggregate signals received from more than one satellite before providing the signals to a multi-switch for selection 0by an integrated decoder-receiver (IRD). The signals from a first satellite are relocated by means of a local oscillator and multiplier to frequencies of unused channels in the signals from a second satellite. The relocated signals from the first satellite are then summed with the unused channels in the signals from the second satellite.

Claims

1. An apparatus for combining a first signal having a first set of channels received from a first satellite and a second signal having a second set of channels received from a second satellite, comprising:

a combiner for summing the first set of channels into the second set of channels, wherein the first set of channels have been relocated to frequencies of one or more unused channels within the second set of channels; and

a multi-switch for accepting the summed first and second set of channels at a one of a plurality of inputs thereof, wherein the multi-switch includes a plurality of outputs and connects a selected one of the inputs to a selected one of the outputs.

2. The apparatus of claim 1, wherein the first and the second set of channels are received from a plurality of transponders on a plurality of satellites in a plurality of orbital slots.

3. The apparatus of claim 2, wherein the first and second set of channels are output from different low noise block down converters with feed (LNBFs) into the combiner.

4. The apparatus of claim 1, wherein the combiner further comprises means for masking the unused channels in the second set of channels and for summing the relocated first set of channels into the second set of received signals using the masked, unused channels in the second set of channels.

5. An antenna unit for receiving signals transmitted from a plurality of communications satellites, for converting the received signals, and for outputting the converted signals to a receiver, comprising:

a reflecting surface;

a plurality of low noise block down converters with feed (LNBFs), wherein each of the LNBFs includes an oscillator and a multiplier for converting the signals received from the satellites to a specified frequency spectrum;

a combiner for summing the converted signals from a first one of the LNBFs with the converted signals from a second one of the LNBFs, wherein the signals from the first one of the LNBFs have been relocated to frequencies of one or more unused channels within the signals from the second one of the LNBFs; and

a multi-switch, having a plurality of inputs and outputs, for accepting the summed signals from the first and second ones of the LNBFs at one of the inputs thereof, wherein the multi-switch connects a selected one of the inputs to a selected one of the outputs.

6. The antenna unit of claim 5, wherein signals from the first and second ones of the LNBFs are received from different transponders on different satellites in different orbital slots.

7. The antenna unit of claim 5, wherein the combiner further comprises means for masking the unused channels in the signals from the second one of the LNBFs and summing the relocated signals from the first one of the LNBFs into the signals from the second one of the LNBFs using the masked, unused channels.

8. The antenna unit of claim 5, wherein the outputs each comprise a coaxial cable for connection to an integrated receiver-decoder (IRD).

9. A method for combining a signal having a first set of channels received from a first satellite and a second signal having a second set of channels received from a second satellite, comprising:

summing the first set of channels into the second set of channels, wherein the first set of channels have been relocated to frequencies of one or more unused channels within the second set of channels; and

accepting the summed first and second set of channels at one of a plurality of inputs to a multi-switch, wherein the multi-switch includes a plurality of outputs and connects a selected one of the inputs to a selected one of the outputs.

10. The method of claim 9, wherein the first and the second set of channels are received from a plurality of transponders on a plurality of satellites in a plurality of orbital slots.

11. The method of claim 9, wherein the first and the second set of channels are output from a plurality of low noise block converters with feed (LNBFs).

12. The method of claim 9, wherein the summing step further comprises masking the unused channels in the second set of channels and summing the relocated first set of channels into the second set of received signals using the masked, unused channels in the second set of channels.