System and method for processing a common cable signal using a low-pass filter tap

• US 8,898,725 B2
• Filed: 10/29/2012
• Issued: 11/25/2014
• Est. Priority Date: 02/24/2003
• Status: Active Grant

• Current Assignee: CSR Technology Incorporated (Qualcomm, Inc.)
• Original Assignee: CSR Technology Incorporated (Qualcomm, Inc.)
• Inventors: Richter, Kurt J., Schneider, Angelika
• Primary Examiner(s): Pendleton, Brian T
• Assistant Examiner(s): Lewis, Jonathan V
• Application Number:
  US13/663,321
• Publication Number:
  US 20130050583A1
• Time in Patent Office: 757 Days
• Field of Search: None
• US Class Current: 725/149
• CPC Class Codes: H03H 7/06 including resistors H03H7/075, H03H7/09, H03H7/12, H03H7/13 take precedence
• CPC Class Codes: H03H 7/461 particularly adapted for use in common antenna systems
• CPC Class Codes: H04N 7/102 Circuits therefor, e.g. noise reducers, equalisers, amplifiers H04N7/108 takes precedence
• CPC Class Codes: H04N 7/104 Switchers or splitters

Abstract

A method for processing an input signal is disclosed. The method includes receiving an input signal. The method also includes applying a first transfer function to the input signal to produce a first signal, wherein the first transfer function exhibits a high pass characteristic. The method further includes applying a second transfer function to the input signal to produce a second signal, the second transfer function exhibiting a low pass characteristic.

Claims

1. A method for reducing power consumed by tuner operation, said method comprising:

extracting, from an input signal, a first signal comprising a plurality of content channels and a second signal comprising a plurality of data channels;

transmitting said first signal to an in-band tuner operable to receive said first signal comprising a plurality of content channels and further operable to extract information from a selected content channel;

transmitting said second signal to an out-of-band tuner operable to receive said second signal comprising said plurality of data channels and further operable to extract information from a selected data channel; and

receiving said extracted second signal comprising said plurality of data channels at an amplifier, said amplifier operable to amplify said second signal and communicate said second signal to said out-of-band tuner.

2. The method of claim 1 further comprising:

selectively extracting frequencies from said input signal so that more power is allocated to higher frequencies within a frequency band used by said in-band tuner and more power is allocated to lower frequencies within a frequency band used by said out-of-band tuner.

3. The method of claim 1 further wherein said extracting is performed by a low pass filter tap.

4. The method of claim 1 further comprising:

applying a first transfer function exhibiting a high pass characteristic on said input signal to produce said first signal; and

applying a second transfer function exhibiting a low pass characteristic on said input signal to produce said second signal.

5. The method of claim 1 further comprising:

applying a first transfer function to produce said first signal, wherein said first transfer function is characterized by a lower average power value in said first frequency band than said average value over all other frequencies in said first signal; and

applying a second transfer function to produce said second signal, wherein said second transfer function is characterized by a higher average power value in said first frequency band than said average value over all other frequencies in said second signal.

6. The method of claim 1 wherein:

said first and second signals are generated from a common signal by a directional coupler;

said first signal has a power that is cutoff at a predetermined range above and below 1 dB less than an original power of said input signal; and

said second signal has a power that is cutoff at a predetermined range above and below 10 dB less than said original power of said input signal.

7. An apparatus for reducing power consumed by tuner operation, said apparatus comprising:

at least one processor; and

a memory coupled to said at least one processor, wherein said least one processor is configured to;

extract, from an input signal, a first signal comprising a plurality of content channels and a second signal comprising a plurality of data channels;

transmit said first signal to an in-band tuner operable to receive said first signal comprising a plurality of content channels and further operable to extract information from a selected content channel;

transmit said second signal to an out-of-band tuner operable to receive said second signal comprising said plurality of data channels and further operable to extract information from a selected data channel; and

receive said extracted second signal comprising said plurality of data channels at an amplifier, said amplifier operable to amplify said second signal and communicate said second signal to said out-of-band tuner.

8. The apparatus of claim 7 wherein said least one processor is configured to:

selectively extract frequencies from said input signal so that more power is allocated to higher frequencies within a frequency band used by said in-band tuner and more power is allocated to lower frequencies within a frequency band used by said out-of-band tuner.

9. The apparatus of claim 7 wherein said least one processor is configured to:

instruct a low pass filter tap to perform said extraction.

10. The apparatus of claim 7 wherein said least one processor is configured to:

apply a first transfer function exhibiting a high pass characteristic on said input signal to produce said first signal; and

apply a second transfer function exhibiting a low pass characteristic on said input signal to produce said second signal.

11. The apparatus of claim 7 wherein said least one processor is configured to:

apply a first transfer function to produce said first signal, wherein said first transfer function is characterized by a lower average power value in said first frequency band than said average value over all other frequencies in said first signal; and

apply a second transfer function to produce said second signal, wherein said second transfer function is characterized by a higher average power value in said first frequency band than said average value over all other frequencies in said second signal.

12. The apparatus of claim 7 wherein said least one processor is configured to:

generate said first and second signals from said by input signal using a directional coupler, where;

said first signal has a power that uniformly approximately 1 dB less than an original power of said input signal; and

said second signal has a power that uniformly approximately 10 dB less than said original power of said input signal.

13. An integrated circuit, said integrated circuit comprising:

a filter element operable to extract, from an input signal, a first signal comprising a plurality of content channels and a second signal comprising a plurality of data channels;

an in-band tuner operable to receive said first signal comprising a plurality of content channels and further operable to extract information from a selected content channel;

an out-of-band tuner operable to receive said second signal comprising said plurality of data channels and further operable to extract information from a selected data channel; and

an amplifier operable to receive said second channel comprising said plurality of data channels from said filter element, and further operable to amplify said second signal and communicate said second signal to said out-of-band tuner.

14. The integrated circuit of claim 13 wherein;

said filter element is further operable to selectively extract frequencies from said input signal so that more power is allocated to higher frequencies within said frequencies used by said in-band tuner and more power is allocated to lower frequencies within said frequencies used by said out-of-band tuner.

15. The integrated circuit of claim 13 wherein said filter element is a low pass filter tap.

16. The integrated circuit of claim 13 wherein:

said first signal is produced by application of a first transfer function exhibiting a high pass characteristic; and

said second signal is produced by application of a second transfer function exhibiting a low pass characteristic.

17. The integrated circuit of claim 13 wherein:

said first signal is produced by application of a first transfer function, wherein said first transfer function is characterized by a lower average power value in said first frequency band than said average value over all other frequencies in said first signal; and

said second signal is produced by application of a second transfer function, wherein said second transfer function is characterized by a higher average power value in said first frequency band than said average value over all other frequencies in said second signal.

18. The integrated circuit of claim 13 wherein:

said first and second signals are generated from a common signal by a directional coupler;

said first signal has a power that uniformly approximately 1 dB less than an original power of said input signal; and

said second signal has a power that uniformly approximately 10 dB less than said original power of said input signal.