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US 12,695,507 B2Granted
Equalization apparatus, optical transmission system, and equalization method
AssigneeNEC Corporation
InventorsMingqi Wu, Kazushi Muraoka
Life of this patent
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Abstract
A penalty is introduced to the channel with less noise when the difference in the transmitted signal quality among channels is reduced; therefore, an equalization apparatus according to an exemplary aspect of the disclosure includes a processing means for performing a process associated with a signal using a transfer function with a coefficient, the signal propagating through each of a plurality of channels; and a coefficient generating means for generating the coefficient based on channel quality information on each of the plurality of channels.
Claims6
An equalization apparatus, comprising:
- at least one memory configured to store instructions;
- and
- at least one processor configured to execute the instructions to cause the equalization apparatus to:
- perform a process associated with a signal using a transfer function with a coefficient, the signal propagating through each of at least three channels;
- and
- generate the coefficient based on channel quality information on each of the at least three channels,
- process first data and second data into a first processed signal and a second processed signal using a first transfer matrix as the transfer function,
- wherein a coefficient of the first transfer matrix is a coefficient that gives more signal power to a channel with a lowest channel quality among the channels selected, in such a way to reduce a difference of quality between the channel with the lowest channel quality and the channel with a highest channel quality,
- wherein the first processed signal is to be transmitted through a first channel of the at least three channels,
- wherein the second processed signal is to be transmitted through a second channel of the at least three channels, and
- wherein one of the first channel and the second channel is the channel with the lowest channel quality, and the other is the channel with the highest channel quality.
8 more elements
An equalization apparatus, comprising:
- at least one memory configured to store instructions;
- and
- at least one processor configured to execute the instructions to cause the equalization apparatus to:
- perform a process associated with a signal using a transfer function with a coefficient, the signal propagating through each of at least three channels;
- generate the coefficient based on channel quality information on each of the at least three channels;
- process first data and second data into a first processed signal and a second processed signal using a first transfer matrix as the transfer function,
- wherein a coefficient of the first transfer matrix is a coefficient that gives more signal power to a channel with a lowest channel quality among the channels selected, in such a way to reduce a difference of quality between the channel with the lowest channel quality and the channel with a highest channel quality,
- wherein the at least one processor is further configured to execute the instructions to cause the equalization apparatus to:
- select the first processed signal for a first channel of the at least three channels, and select the second processed signal for a second channel of the at least three channels, and
- wherein one of the first channel and the second channel is the channel with the lowest channel quality, and the other is the channel with the highest channel quality.
7 more elements
An equalization method, comprising:
- performing a process associated with a signal using a transfer function with a coefficient, the signal propagating through each of at least three channels;
- and
- generating the coefficient based on channel quality information on each of the at least three channels,
- wherein the generating of the coefficient includes measuring channel quality of each of the at least three channels,
- wherein a coefficient of the transfer function is a coefficient that gives more signal power to a channel with a lowest channel quality among the channels selected, in such a way to reduce a difference of quality between the channel with the lowest channel quality and the channel with a highest channel quality, and
- wherein the performing of the process associated with the signal includes processing data to be transmitted through channels having a difference in the channel quality between the channel with the lowest channel quality and the channel with the highest channel quality in such a way as to give more signal power to the channel with lowest channel quality.
3 more elements
Dependencies are inferred from the claim text.