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US 7,010,028 B2Granted
System and method for rapid generation of low par Q-mode signals
AssigneeBroadcom Corporation
InventorArthur J. Carlson
Life of this patent
Estimating the term…
Abstract
In a data communication system, a transmitter of an ADSL modem uses a PRBS generator to generate a plurality of ADSL signals. The transmitter computes the Peak to Average (e.g., root-mean-square) (“PAR”) ratio of each of the ADSL signals generated. The ADSL signal having the lowest PAR is determined, and the corresponding state of the PRBS generator is noted. The signal having the lowest PAR, or at least the corresponding state of the PRBS generator, is then used to generate a Q-mode signal.
Claims12
A communication system comprising:
- a data communication node;
- a transmitter located in the data communication node, the transmitter having a pseudo-random bit sequence (PRBS) generator, the transmitter using the PRBS generator to generate a plurality of signals, the transmitter determining the peak-to-average ratio (PAR) of each of the plurality of signals generated and outputting at least an indication of a one of the plurality of signals having a lowest PAR;
- and
- wherein the one of the plurality of signals having the lowest PAR is used to generate a non-data made signal.
1 more element
A communication system comprising:
- a data communication node;
- a transmitter located in the data communication node, the transmitter having a pseudo-random bit sequence (PRBS) generator, the transmitter using the PRBS generator to generate a plurality of signals, the transmitter determining the peak-to-average ratio (PAR) of cach of the plurality of signals generated and outputting at least an indication of a one of the plurality of signals having a lowest PAR;
- and
- wherein the data communication node comprises an ADSL modem, the plurality of signals comprises a plurality of ADSL signals, and the one of the plurality of signals having the lowest PAR is used to generate a Q-mode signal.
1 more element
A communication system comprising:
- a data communication node;
- a transmitter located in the data communication node, the transmitter having a pseudo-random bit sequence (PRBS) generator, the transmitter using the PRBS generator to generate a plurality of signals, the transmitter determining the peak-to-average ratio (PAR) of each of the plurality of signals generated and outputting at least an indication of a one of the plurality of signals having a lowest PAR;
- and
- wherein the at least an indication of the one of the plurality of signals having the lowest PAR produced by the transmitter is communicated to a remote receiver, and is used by the remote receiver to receive a non-data mode signal.
1 more element
A communication system comprising:
- a data communication node;
- a transmitter located in the data communication node, the transmitter having a pseudo-random bit sequence (PRBS) generator, the transmitter using the PRBS generator to generate a plurality of signals, the transmitter determining the peak-to-average ratio (PAR) of each of the plurality of signals generated and outputting at least an indication of a one of the plurality of signals having a lowest PAR;
- and
- wherein the data communication node comprises an ADSL modem, the plurality of signals comprises a plurality of ADSL signals, and the at least an indication the one of the plurality of signals having the lowest PAR output by the transmitter is communicated to a remote receiver, and is used by the remote receiver to receive a Q-mode signal.
1 more element
A communication system comprising:
- a data communication node;
- a transmitter located in the data communication node, the transmitter having a pseudo-random bit sequence (PRBS) generator, the transmitter using the PRBS generator to generate a plurality of signals, the transmitter determining the peak-to-average ratio (PAR) of each of the plurality of signals generated and outputting at least an indication of a one of the plurality of signals having a lowest PAR;
- and
- wherein the at least an indication of the one of the plurality of signals having the lowest PAR comprises a state of the PRBS generator that generated the one of the plurality of signals having the lowest PAR.
1 more element
A communication system comprising:
- a data communication node;
- a transmitter located in the data communication node, the transmitter having a pseudo-random bit sequence(PRBS) generator, the transmitter using the PRBS generator to generate a plurality of signals, the transmitter identifying a one of the plurality of signals generated having a lowest peak-to-average ratio (PAR);
- and
- wherein the one of the plurality of signals having the lowest PAR is used to generate a non-data mode signal.
1 more element
A communication system comprising:
- a data communication node;
- a transmitter located in the data communication node, the transmitter having a pseudo-random bit sequence(PRBS) generator, the transmitter using the PRBS generator to generate a plurality of signals, the transmitter identifying a one of the plurality of signals generated having a lowest peak-to-average ratio (PAR);
- and
- wherein the data communication node comprises an ADSL modem, the plurality of signals comprises a plurality of ADSL signals, and the one of the plurality of signals having the lowest PAR is used to generate a Q-mode signal.
1 more element
A communication system comprising:
- a data communication node;
- a transmitter located in the data communication node, the transmitter having a pseudo-random bit sequence(PRBS) generator, the transmitter using the PRBS generator to generate a plurality of signals, the transmitter identifying a one of the plurality of signals generated having a lowest peak-to-average ratio (PAR);
- and
- wherein the data communication node comprises an ADSL modem, the plurality of signals comprises a plurality of ADSL signals, and a state of the PRBS generator that generated the one of the plurality of signals having the lowest PAR is communicated to a remote receiver, and is used by the remote receiver to receive a Q-mode signal.
1 more element
A communication system comprising:
- a data communication node;
- a transmitter located in the data communication node, the transmitter having a pseudo-random bit sequence(PRBS) generator, the transmitter using the PRBS generator to generate a plurality of signals, the transmitter identifying a one of the plurality of signals generated having a lowest peak-to-average ratio (PAR);
- and
- wherein a state of the PRBS generator that generated the one of the plurality of signals having the lowest PAR is communicated to a remote receiver, and is used by the remote receiver to receive a non-data mode signal.
1 more element
A method of operating a transmitter in a data communication system, the transmitter having a pseudo-random bit sequence (PRBS) generator, the method comprising:
- generating a plurality of signals using the PRBS generator;
- determining a one of the plurality of signals generated having a lowest peak-to-average ratio (PAR);
- outputting at least an indication of the one of the plurality of signals having the lowest PAR;
- communicating the at least an indication of the one of the plurality of signals having the lowest PAR to a remote receiver;
- receiving by the remote receiver the at least an indication of the one of the plurality of signals having the lowest PAR;
- and
- generating using the at least an indication of the one of the plurality of signals having the lowest PAR a non-data mode signal.
4 more elements
Dependencies are inferred from the claim text.