Reliable multicarrier communication in the presence of timing phase error
First Claim
1. A method comprising:
- measuring phase noise in a signal, the phase noise due to a sampling-time phase mismatch between a transmitter device and a receiver device;
determining a Gaussian noise power level in the signal;
calculating a gain factor associated with the phase noise; and
applying the gain factor to the Gaussian noise power level to calculate an equivalent noise power.
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Accused Products
Abstract
A method, system and apparatus for reliable multicarrier communication in the presence of timing phase error is disclosed. Phase noise due to a sampling-time phase mismatch between a transmitter device and a receiver device is measured in a signal. A Gaussian noise power level in the signal is determined, and a gain factor associated with the phase noise is calculated. The gain factor is applied to the Gaussian noise power level to calculate an equivalent noise power. In one aspect, the equivalent noise power is used to determine a signal-to-noise ratio. In another aspect, the signal is a multicarrier signal including a plurality of sub-carriers.
48 Citations
44 Claims
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1. A method comprising:
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measuring phase noise in a signal, the phase noise due to a sampling-time phase mismatch between a transmitter device and a receiver device;
determining a Gaussian noise power level in the signal;
calculating a gain factor associated with the phase noise; and
applying the gain factor to the Gaussian noise power level to calculate an equivalent noise power. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A machine-readable medium storing executable instructions to a cause a device to perform a method comprising:
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measuring phase noise in a signal, the phase noise due to a sampling-time phase mismatch between a transmitter device and a receiver device;
determining a Gaussian noise power level in the signal;
calculating a gain factor associated with the phase noise; and
applying the gain factor to the Gaussian noise power level to calculate an equivalent noise power. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26)
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27. An apparatus comprising:
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means for measuring phase noise in a signal, the phase noise due to a sampling-time phase mismatch between a transmitter device and a receiver device;
means for determining a Gaussian noise power level in the signal;
means for calculating a gain factor associated with the phase noise; and
means for applying the gain factor to the Gaussian noise power level to calculate an equivalent noise power. - View Dependent Claims (28, 29, 30, 31, 32, 33, 34, 35, 36, 37)
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38. A Digital Subscriber Line (DSL) modem comprising:
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a timing recovery module to measure a timing phase error within a signal, the timing phase error due to a sampling-time phase mismatch between a transmitter device and the DSL modem;
a phase noise power module to determine a phase noise power level of the signal, the phase noise power level based on the timing phase error;
a total noise power measurement module to measure a total noise power level of the signal, wherein a Gaussian noise power level of the signal is represented as the difference between the phase noise power level and the total noise power level; and
a gain factor module to calculate a gain factor associated with the timing phase error and to apply the gain factor to the Gaussian noise power level in the signal to calculate an equivalent noise power. - View Dependent Claims (39, 40, 41, 42, 43, 44)
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Specification