SYSTEMS AND METHODS FOR PROVIDING A MoCA COMPATABILITY STRATEGY

• US 20090165070A1
• Filed: 12/19/2007
• Published: 06/25/2009
• Est. Priority Date: 12/19/2007
• Status: Abandoned Application

• Current Assignee: Avago Technologies General IP PTE Limited (Broadcom, Inc.)
• Original Assignee: Broadcom Corporation (Broadcom, Inc.)
• Inventors: Gomez, Ramon A., McMullin, Donald G.
• Application Number:
  US11/959,662
• Publication Number:
  US 20090165070A1
• Time in Patent Office: Days
• US Class Current: 725/125
• CPC Class Codes: H04B 1/10 Means associated with receiver for limiting or suppressing noise or interference
• CPC Class Codes: H04B 15/00 Suppression or limitation of noise or interference by means associated with receiver H04B1/10
• CPC Class Codes: H04B 2215/068 by avoiding a reception frequency range
• CPC Class Codes: H04H 20/78 CATV [Community Antenna Television] systems
• CPC Class Codes: H04H 40/27 specially adapted for broadcast systems covered by groups H04H20/53 - H04H20/95
• CPC Class Codes: H04N 7/104 Switchers or splitters

Abstract

Systems and methods for perform a method for reducing interference from Multimedia over Coax Alliance (MOCA) signals in a cable television double conversion tuner are provided. The method may include receiving an indication of the channel in which MoCA signals are operating. When the channel in which the MoCA signals are operating is in the same frequency band as an intermediate frequency of the tuner, the method may require shifting an intermediate frequency of the tuner out of the frequency band occupied by the channel in which the MoCA signals are operating.

Claims

1. One or more computer-readable media storing computer-executable instructions which, when executed by a processor on a computer system, perform a method for reducing interference from Multimedia over Coax Alliance (MOCA) signals in a cable television double conversion tuner, the method comprising:

receiving an indication of the channel in which MoCA signals are operating; and

shifting an intermediate frequency of the tuner out of the frequency band occupied by the channel in which the MoCA signals are operating.

2. The method of claim 1 further comprising receiving an indication that the channel in which the MoCA signals are operating is between about 1178 MHz and about 1222 MHz.

3. The method of claim 1 further comprising receiving an indication that the channel in which the MoCA signals are operating is between about 1228 MHz and about 1272 MHz.

4. The method of claim 1, wherein the shifting a band of operation for an intermediate filter comprises adjusting the operation of an oscillator in the tuner in order to shift the band of operation of the intermediate filter.

5. The method of claim 1 further comprising using a common master processor to coordinate the operation of a MoCA transceiver and the intermediate filter of the tuner.

6. A computer-readable medium storing computer-executable instructions for operating a cable television double conversion tuner, the instructions comprising:

a first instruction that receives an indication of the channel in which MoCA signals are operating; and

when a band of operation of an intermediate frequency conflicts with the channel in which the MoCA signals are operating, a second instruction that shifts the band of operation for an intermediate filter of the tuner out of the frequency band occupied by the channel in which the MoCA signals are operating.

7. The computer-readable medium of claim 6, the first instruction comprising receiving an indication that the channel in which the MoCA signals are operating is between about 1178 MHz and about 1222 MHz.

8. The computer-readable medium of claim 6, the first instruction comprising receiving an indication that the channel in which the MoCA signals are operating is between about 1228 MHz and about 1272 MHz.

9. The computer-readable medium of claim 6, further comprising, when a band of operation for an intermediate filter conflicts with the channel in which the MoCA signals are operating, a third instruction that adjusts the operation of an oscillator in the intermediate filter in order to shift the band of operation of the intermediate filter.

10. The computer-readable medium of claim 6 further comprising a third instruction that uses a common master processor to coordinate the operation of a MoCA transceiver and the intermediate filter of the tuner.

11. A double conversion tuner comprising a microprocessor configured to:

store an indication of the channel in which MoCA signals in a house are operating;

determine whether the intermediate frequency of the tuner is in the frequency band occupied by the channel in which the MoCA signals are operating; and

if the intermediate frequency of the tuner is in the frequency band occupied by the channel in which the MoCA signals are operating, shift the intermediate frequency of the tuner to a frequency band that is outside the channel in which the MoCA signals are operating.

12. An electrical circuit comprising:

a low noise amplifier that receives a radio frequency signal and that provides an output signal;

a filter that filters the output signal to eliminate MoCA interference in a frequency band at least between about 1210 MHz and about 1230 MHz in order to provide a filtered signal; and

a double conversion cable television tuner that receives the filtered signal from the filter.

13. The electrical circuit of claim 12 wherein the low noise amplifier and the tuner are integrated on two separated integrated circuits.

14. The electrical circuit of claim 12 wherein the filter is a low pass filter.

15. The electrical circuit of claim 12 wherein the filter is a bandstop filter.

16. The electrical circuit of claim 12 wherein the filter is a bandpass filter.

17. An electrical circuit comprising:

a low noise amplifier that receives a radio frequency signal and that provides an output signal;

a filter that filters the output signal to eliminate MoCA interference in a frequency band at least between about 1178 MHz and about 1272 MHz in order to provide a filtered signal; and

a double conversion cable television tuner that receives the filtered signal from the filter.

18. The electrical circuit of claim 17 wherein the low noise amplifier and the tuner are integrated on two separated integrated circuits.

19. The electrical circuit of claim 17 wherein the filter is a low pass filter that attenuates signals including frequencies below 1272 MHz.

20. The electrical circuit of claim 17 wherein the filter is a bandstop filter.