Method and apparatus for broadband data conversion
View Patent ↗A receiver may receive a signal and process each of a plurality of sub-bands of the received signal via a respective one of a plurality of first-type receive chains. The receiver may utilize a signal output by a first one of the plurality of the first-type receive chains to remove undesired signals from a signal output by a second one of the plurality of the first-type receive chains. The undesired signals may comprise aliases and/or harmonics of one or more signals that fall within a sub-band of the first one of the plurality of the first-type receive chains. The receiver may downconvert, filter, and digitize each of the plurality of sub-bands via a corresponding one of the plurality of the first type receive chains. The received signal may encompass the cable television band, and each of the plurality of sub-bands may comprise a plurality of cable television channels.
1. A system comprising:
one or more circuits of a receiver, said one or more circuits comprising a plurality of first-type receive chains, each of said plurality of first-type receive chains being operable to process a respective one of a plurality of sub-bands of a received signal; and
a digital signal processing module operable to utilize a signal output by a first one of said plurality of first-type receive chains to remove undesired signals from a signal output by a second one of said plurality of first-type receive chains.
2. The system of claim 1 , wherein said undesired signals comprise aliases of one or more signals within one of said plurality of sub-bands processed by said first one of said plurality of first-type receive chains.
3. The system of claim 1 , wherein said undesired signals comprise harmonics of one or more signals within one of said plurality of sub-bands processed by said first one of said plurality of first-type receive chains.
4. The system of claim 1 , wherein each of said plurality of first-type receive chains is operable to downconvert, filter, and digitize said respective one of said plurality of sub-bands of said received signal.
5. The system of claim 1 , wherein each of said plurality of first-type receive chains downconverts said respective one of said plurality of sub-bands of said received signal utilizing a respective one of a plurality of fixed-frequency local oscillator signals.
6. The system of claim 5 , wherein a frequency of each one of said plurality of fixed-frequency local oscillator signals is different than a frequency of each other one of said plurality of fixed-frequency local oscillator signals.
7. The system of claim 1 , wherein said one or more circuits are operable to enable and disable one or more of said plurality of first-type receive chains based on whether a channel to be output by said receiver is located in one of said plurality of sub-bands of said received signal that is processed by said one or more of said plurality of first-type receive chains.
8. The system of claim 1 , wherein:
said received signal encompasses a cable television band; and
each of said plurality of sub-bands of said received signal comprises a plurality of cable television channels.
9. The system of claim 1 , wherein said one or more circuits comprise at least one second-type receive chain that is operable to concurrently process all of said plurality of sub-bands of said received signal.
10. The system of claim 1 , wherein each one of said plurality of sub-bands of said received signal is substantially non-overlapping with each other one of said plurality of sub-bands of said received signal.
11. A method comprising:
receiving a first signal;
processing each of a plurality of sub-bands of said received first signal via a respective one of a plurality of first-type receive chains of a receiver;
utilizing a signal output by a first one of said plurality of first-type receive chains to remove undesired signals from a signal output by a second one of said plurality of first-type receive chains.
12. The method of claim 11 , wherein said undesired signals comprise aliases of one or more signals within one of said plurality of sub-bands processed by said first one of said plurality of first-type receive chains.
13. The method of claim 11 , wherein said undesired signals comprise harmonics of one or more signals within one of said plurality of sub-bands processed by said first one of said plurality of first-type receive chains.
14. The method of claim 11 , comprising downconverting, filtering, and digitizing each of said plurality of sub-bands of said received first signal via a corresponding one of said plurality of first type receive chains.
15. The method of claim 11 , wherein each of said plurality of first-type receive chains downconverts a respective one of said plurality of sub-bands of said received first signal utilizing a respective one of a plurality of fixed-frequency local oscillator signals.
16. The method of claim 15 , wherein a frequency of each one of said plurality of fixed-frequency local oscillator signals is different than a frequency of each other one of said plurality of fixed-frequency local oscillator signals.
17. The method of claim 11 , comprising controlling whether one or more of said plurality of first-type receive chains is enabled or disabled based on whether a channel to be output by said receiver is located in a sub-band of said received first signal that is processed by said one or more of said plurality of first-type receive chains.
18. The method of claim 11 , wherein:
said received first signal encompasses a cable television band; and
each of said plurality of sub-bands of said received signal comprises a plurality of cable television channels.
19. The method of claim 11 , comprising concurrently processing all of said plurality of sub-bands of said received first signal via at least one second-type receive chain of said receiver.
20. The method of claim 11 , wherein each one of said plurality of sub-bands of said received first signal is substantially non-overlapping with each other one of said plurality of sub-bands of said received first signal.