Equalization filter and distortion compensating method
AssigneeNEC Corporation
InventorShigeki Wada
Life of this patent
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Abstract
An equalization filter is provided for solving the problem in which there is a limited range in which compensated for distortion of a transmission signal can be made. Measuring instrument 104 measures a distortion quantity which characterizes distortion of the transmission signal. Comparator 105a generates a differential signal which indicates the difference between the transmission signal and a compensation signal. Delay device 105b delays the differential signal based on the distortion quantity measured by measurement instrument 104 and generates the compensation signal.
Claims30
An equalization filter comprising an input unit for receiving a transmission signal, a generation unit for generating a compensation signal for compensating for distortion of the transmission signal, and a compensation unit for compensating for distortion of the transmission signal based on the compensation signal, further comprising;
- a measuring unit is included for measuring a distortion quantity which characterizes the distortion of the transmission signal wherein:
- said compensation unit generates a differential signal which indicates the difference between the transmission signal and the compensation signal;
- and
- said generation unit delays the differential signal based on the distortion quantity measured by said measuring unit to generate the compensation signal.
A distortion compensating method performed by an equalization filter comprising an input unit for receiving a transmission signal, a generation unit for generating a compensation signal for compensating for distortion of the transmission signal, and a compensation unit for compensating for distortion of the transmission signal based on the compensation signal, said method comprising:
- measuring a distortion quantity which characterizes the distortion of the transmission signal;
- generating a differential signal which indicates the difference between the transmission signal and the compensation signal;
- and
- delaying the differential signal based on the measured distortion quantity measured to generate the compensation signal.
Dependencies are inferred from the claim text.