Invention Grant
- Patent Title: Decision feedback equalization with precursor inter-symbol interference reduction
- Patent Title (中): 决策反馈均衡与前导符号间干扰减少
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Application No.: US14707919Application Date: 2015-05-08
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Publication No.: US09379920B1Publication Date: 2016-06-28
- Inventor: Yu Liao , Hongtao Zhang , Kun-Yung Chang , Geoffrey Zhang
- Applicant: Xilinx, Inc.
- Applicant Address: US CA San Jose
- Assignee: XILINX, INC.
- Current Assignee: XILINX, INC.
- Current Assignee Address: US CA San Jose
- Agent W. Eric Webostad
- Main IPC: H04L25/03
- IPC: H04L25/03 ; H04L27/01

Abstract:
In a receiver, a decision feedback equalizer (“DFE”) receives an analog input signal. The DFE includes a subtraction block for subtracting weighted postcursor decisions from an analog input signal to provide an analog output signal. A postcursor decision block coupled to the DFE compares the analog output signal against positive and negative values of a postcursor coefficient to provide first and second possible decisions for selecting a current postcursor-based decision therebetween responsive to a previous postcursor-based decision. A precursor cancellation block receives the analog output signal, the previous postcursor-based decision and the current postcursor-based decision for providing a digital output signal for a previous sample of the analog input signal.
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