Methods and apparatuses for canceling correlated noise in a multi-carrier communication system
First Claim
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1. A method for estimating noise in a multi-channel communication system having a plurality of channels, comprising:
- measuring noise present on a first and a second reference channel from among the plurality of channels;
estimating noise present on a target channel from among the plurality of channels that is correlated to the noise present on the first and the second reference channels by weighting the noise present on the first and the second reference channels using a first and a second weighting factor, respectively, and adding a first weighted noise measurement corresponding to weighted noise present on the first reference channel and a second weighted noise measurement corresponding to weighted noise present on the second reference channel; and
canceling the noise present on the target channel that is correlated to the noise present on the first and the second reference channels from the noise present on the target channel to determine a residual noise.
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Abstract
Embodiments of an apparatus, system, and method are described for a multi-carrier communication system that cancels at least some correlated noise estimated to be present in a channel in the multi-carrier communication system. Values of noise present on at least on reference channel in a multi-channel communication system may be measured. Correlated noise on a target channel using the noise measurement on the reference channel may be estimated. A residual noise on the target channel may be determined by canceling the estimated correlated noise on the target channel.
205 Citations
25 Claims
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1. A method for estimating noise in a multi-channel communication system having a plurality of channels, comprising:
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measuring noise present on a first and a second reference channel from among the plurality of channels; estimating noise present on a target channel from among the plurality of channels that is correlated to the noise present on the first and the second reference channels by weighting the noise present on the first and the second reference channels using a first and a second weighting factor, respectively, and adding a first weighted noise measurement corresponding to weighted noise present on the first reference channel and a second weighted noise measurement corresponding to weighted noise present on the second reference channel; and canceling the noise present on the target channel that is correlated to the noise present on the first and the second reference channels from the noise present on the target channel to determine a residual noise. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method for estimating noise in a multi-channel communication system having a plurality of channels, comprising:
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measuring noise present on a reference channel from among the plurality of channels; estimating noise present on a target channel from among the plurality of channels that is correlated to the noise present on the reference channel by evaluating;
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10. A method for estimating noise in a multi-channel communication system having a plurality of channels, comprising:
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measuring noise present on a reference channel from among the plurality of channels; estimating noise present on a target channel from among the plurality of channels that is correlated to the noise present on the reference channel by determining a product of a weighting factor corresponding to the reference channel and the noise present on the reference channel; and canceling the noise present on the target channel that is correlated to the noise present on the reference channel from the noise present on the target channel to determine a residual noise by evaluating;
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11. A method for estimating noise in a multi-channel communication system having a plurality of channels, comprising:
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measuring noise present on a reference channel from among the plurality of channels; estimating noise present on a target channel from among the plurality of channels that is correlated to the noise present on the reference channel by determining a product of a weighting factor corresponding to the reference channel and the noise present on the reference channel; and canceling the noise present on the target channel that is correlated to the noise present on the reference channel from the noise present on the target channel to determine a residual noise by evaluating;
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12. A non-transitory computer readable medium having instructions stored thereon that, if executed by a machine, cause the machine to perform operations comprising:
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measuring noise present on a first and a second reference channel from among a plurality of channels in a multi-channel communication system; estimating noise present on a target channel from among the plurality of channels that is correlated to the noise present on the first and the second reference channels by weighting the noise present on the first and the second reference channels using a first and a second weighting factor, respectively, and adding a first weighted noise measurement corresponding to weighted noise present on the first reference channel and a second weighted noise measurement corresponding to weighted noise present on the second reference channel; and canceling the noise present on the target channel that is correlated to the noise present on the first and the second reference channels from the noise present on the target channel to determine a residual noise. - View Dependent Claims (13, 14, 15)
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16. A method of determining a signal to noise ratio for a channel in a multi-channel communication system, comprising:
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selecting a first and a second channel from among a plurality of channels as a first and a second reference channel, respectively; selecting a third channel from among the plurality of channels as a target channel; measuring the noise present on the first and the second reference channels; predicting the noise present on the target channel correlated to the noise present on the first and the second reference channels by weighting the noise present on the first and the second reference channels using a first and a second weighting factor, respectively, and adding a first weighted noise measurement corresponding to weighted noise present on the first reference channel and a second weighted noise measurement corresponding to weighted noise present on the second reference channel; generating a residual noise on the target channel by canceling the noise present on the target channel that is correlated noise to the noise present on the first and the second reference channels; and determining a signal to noise ratio for the target channel based on the residual noise.
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17. An apparatus for estimating noise in a multi-channel communication system having a plurality of channels, comprising:
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means for measuring noise present on a first and a second reference channel from among the plurality of channels; means for estimating noise present on a target channel from among the plurality of channels that is correlated to the noise present on the first and the second reference channels by weighting the noise present on the first and the second reference channels using a first and a second weighting factor, respectively, and adding a first weighted noise measurement corresponding to weighted noise present on the first reference channel and a second weighted noise measurement corresponding to weighted noise present on the second reference channel; and means for generating a residual noise on the target channel by canceling the noise present on the target channel that is correlated to the noise present on the first and the second reference channels. - View Dependent Claims (18, 19)
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20. A transmitter-receiver, comprising:
a noise canceller, comprising; a noise detector configured to measure noise present a first and a second reference channel in a multi-channel communication system; and a noise estimator configured to estimate noise present on a target channel in the multi-channel communication system that is correlated to the noise present on the first and the second reference channels by weighting the noise present on the first and the second reference channels using a first and a second weighting factor, respectively, and adding a first weighted noise measurement corresponding to weighted noise present on the first reference channel and a second weighted noise measurement corresponding to weighted noise present on the second reference channel, wherein the noise canceller is configured to determine a residual noise present on the target channel based on noise present in the target channel that is correlated to the noise present on the first and the second reference channels. - View Dependent Claims (21, 22, 23, 24, 25)
Specification