Data scrambler generation of pseudo-random bit sequence for semi-stationary Q-mode signal
AssigneeBroadcom Corporation
InventorsArthur J. Carlson, Haixiang Liang
Life of this patent
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Abstract
In a data communication system, a transmitter of a modem, for example, uses a single scrambler to operate in a data communication mode and in a non-data mode. During the data communication mode the scrambler is used to scramble data for communication by the transmitter. During the non-data mode, the scrambler is used to generate a non-data mode signal for communication by the scrambler. The modem may be an ADSL modem, for example, in which case the data communication mode is SHOWTIME while the non-data mode may be Q-mode.
Claims22
A communication system comprising:
- a data communication node;
- and
- a transmitter located in the data communication node, the transmitter having a scrambler, the transmitter using the scrambler to operate in a first, data communication mode and in a second, non-data mode.
A method of operating a transmitter in a data communication system, the transmitter having a scrambler, the method comprising:
- determining that data is present at at least one input;
- determining whether the scrambler is configured for a data communication mode;
- configuring the scrambler for the data communication mode if a determination is made that the scrambler is not configured for the data communication mode;
- operating in the data communication mode;
- determining that data is not present at the at least one input;
- determining whether the scrambler is configured for a non-data mode;
- configuring the scrambler for the non-data mode if a determination is made that the scrambler is not configured for the non-data mode;
- and
- operating in the non-data mode.
A method of operating a transmitter in a data communication system, the transmitter having a scrambler, the method comprising:
- selecting a non-data mode input to the scrambler;
- generating, using a first output of the scrambler, a non-data mode signal;
- and
- controlling, using a second output of the scrambler, the output of the non-data mode signal.
Dependencies are inferred from the claim text.