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US 8,428,115 B2Granted
Adaptive equalization system and method
AssigneeIPGoal Microelectronics (SiChuan) Co., Ltd.
InventorsZiche Zhang, Guosheng Wu
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AssigneeIPGoal Microelectronics (SiChuan) Co., Ltd.
InventorsZiche Zhang, Guosheng Wu
Estimating the term…
An adaptive equalization system includes an equalizer, a common-mode extraction buffer unit, a low-pass filter unit, a first and second energy compare units, a current comparator, and a digital control unit. The common-mode extraction buffer unit transmits a full spectral energy of an input signal received by the equalizer to the first energy compare unit and the low-pass filter unit, and extracts a common-mode signal of the input signal to the second energy compare unit. The first and second energy compare units respectively output a current signal characterized by the high-frequency energy and a current signal characterized by the low-frequency energy to the current comparator. Based on the compare result outputted by the current comparator, the digital control unit outputs an equalization control signal to the equalizer. The adaptive equalization system has the simple structure, and reduces the power consumption, the area and the manufacturing cost of the chip.
An adaptive equalization system, comprising:
An adaptive equalization system, comprising:
An adaptive equalization method, comprising the steps of:
Dependencies are inferred from the claim text.
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Using amplitude-frequency equalisers: variable equalisers
Line equalisers; line build-out devices: adaptive
Transmission
Digital communication
About 4 years 11 months of term left · ends 27 Sep 2031 (estimated)
1. Field of Invention
The present invention relates to a signal processing system and method, and more particularly to an adaptive equalization system and method with the simple structure.
2. Description of Related Arts
FIG. 1 is a system block diagram of an adaptive equalization system according to a preferred embodiment of the present invention.
FIG. 2 is a system block diagram of the adaptive equalization system at an initialization working state according to the above preferred embodiment of the present invention.
FIG. 3 is a system block diagram of the adaptive equalization system at a normal working state according to the above preferred embodiment of the present invention.
Referring to FIG. 1 of the drawings, an adaptive equalization system according to a preferred embodiment of the present invention is illustrated, wherein the adaptive equalization system comprises a source selection unit, an equalizer connected with the source selection unit, a common-mode extraction buffer unit connected with the equalizer, a low-pass filter unit connected with the common-mode extraction buffer unit, a first energy compare unit connected with the low-pass filter unit, a second energy compare unit connected with the low-pass filter unit, a current comparator connected with the first and second energy compare units, and a digital control unit connected with the current comparator.
A first input end of the source selection unit is connected with an ideal signal end, a second input end thereof is connected with an input signal end, a first output end thereof is connected with an input end of the common-mode extraction buffer unit, and a second output end thereof is connected with an input end of the equalizer. An output end of the equalizer is connected with the input end of the common-mode extraction buffer unit. A first output end of the common-mode extraction buffer unit and an input end of the low-pass filter unit are connected with a positive input end of the first energy compare unit, and a second output end of the common-mode extraction buffer unit is connected with a negative input end of the second energy compare unit. An output end of the low-pass filter unit is connected with a negative input end of the first energy compare unit and a positive input end of the second energy compare unit. An output end of the first energy compare unit is connected with a positive input end of the current comparator. An output end of the second energy compare unit is connected with a negative input end of the current comparator. An output end of the current comparator is connected with an input end of the digital control unit. An output end of the digital control unit is connected with the source selection unit, the equalizer and the low-pass filter unit.
Based on the signal outputted by the digital control unit, the source selection unit switches the signals respectively inputted from the ideal signal end and the input signal end. When the signal is inputted into the ideal signal end, the source selection unit directly transmits the signal inputted into the ideal signal end to the common-mode extraction buffer unit. When the signal is inputted into the input signal end, the source selection unit transmits the signal inputted into the input signal end to the equalizer.