Adaptive frequency-domain reference noise canceller for multicarrier communications systems
First Claim
Patent Images
1. A method comprising:
- receiving a data signal and a reference signal; and
aligning data blocks in the data signal with data blocks in the reference signal to increase cross-correlation between the data signal and the reference signal as compared to the unaligned data and reference signals.
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Abstract
A method and apparatus to align data blocks in a data signal and a reference signal to increase cross-correlation between the data signal and the reference signal as compared to the unaligned data and reference signals and cancel interference in the data signal in the frequency-domain under changing conditions and in the presence of the data signal.
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Citations
41 Claims
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1. A method comprising:
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receiving a data signal and a reference signal; and aligning data blocks in the data signal with data blocks in the reference signal to increase cross-correlation between the data signal and the reference signal as compared to the unaligned data and reference signals. - View Dependent Claims (2, 3, 4, 5)
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6. An apparatus comprising:
a block aligner configured to align data blocks in a data signal received from a data line with data blocks in a reference signal received from a reference lineto increase cross-correlation between the data signal and the reference signal as compared to the unaligned data and reference signals. - View Dependent Claims (7, 8, 9, 10)
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11. A method comprising:
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generating an interference estimate for a received data signal; and adaptively updating an interference canceller with the interference estimate to cancel changing sources of interference during data transmission. - View Dependent Claims (12, 13, 14, 15, 16, 17)
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18. An apparatus comprising:
a tone-by-tone canceller operating in the frequency domain, configured to reduce interference in a data signal. - View Dependent Claims (19, 20, 21, 22)
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23. A method comprising:
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aligning blocks of a received data signal with blocks of a received reference signal to increase cross-correlation between the data signal and the reference signal as compared to the unaligned data and reference signals; and canceling interference in the data signal in the frequency domain. - View Dependent Claims (24, 25, 26, 27, 28)
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29. An apparatus comprising:
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a block aligner configured to align data blocks in a data signal and a reference signal to increase cross-correlation between the data signal and the reference signal as compared to the unaligned data and reference signals; and a tone-by-tone canceller coupled to the block aligner, the canceller operating in the frequency domain to cancel interference in the data signal. - View Dependent Claims (30, 31, 32, 33, 34, 35)
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36. An apparatus, comprising:
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means for receiving a data signal and a reference signal; and means for aligning data blocks in the data signal with data blocks in the reference signal to maximize cross-correlation between the data signal and the reference signal. - View Dependent Claims (37, 38, 39, 40, 41)
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Specification