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1. 发明授权

US06754294B1 Dual equalizer for use in an receiver and method of operation 有权
标题翻译：用于接收机的双均衡器和操作方法
公开(公告)号：US06754294B1
公开(公告)日：2004-06-22
申请号：US09627453
申请日：2000-07-27
申请人： Srihari Adireddy , Lang Tong
发明人： Srihari Adireddy , Lang Tong
IPC分类号： H03D1104
CPC分类号： H04L25/03057 , H04L25/0228 , H04L2025/0349 , H04L2025/03617
摘要： An apparatus for reducing a precursor ISI signal in a receiver that receives an incoming stream of symbols distorted by intersymbol interference (ISI) includes: 1) a first forward filter for receiving the incoming stream of distorted symbols and generating a first equalized output signal (Y′k); 2) a first decision feedback equalizer (DFE) stage for receiving the Y′k signal and generating a first decided symbol sequence (Ŝk−d), wherein the first DFE stage generates from Ŝk−d a first postcursor cancellation signal that reduces postcursor ISI in the Y′k signal and generates from the Y′k signal a first symbol estimate signal (vk) in which postcursor ISI is at least partially reduced; and 3) a second decision feedback equalizer (DFE) stage for receiving the Y′k signal and generating a second decided symbol sequence (Ŝk−2d), wherein the second DFE stage comprises a soft symbol estimator that receives the vk signal and generates a soft decision sequence (Ŝ′k−d) comprising decided symbols and zero output signals, and wherein the second DFE stage generates from Ŝ′k−d a precursor cancellation signal that reduces precursor ISI in the Y′k signal.
摘要翻译：一种用于减少接收器中的前体ISI信号的装置，其接收由符号间干扰（ISI）失真的进入的符号流，包括：1）第一正向滤波器，用于接收输入的失真符号流并产生第一均衡输出信号 'k）; 2）第一判决反馈均衡器（DFE）级，用于接收所述Y'k信号并产生第一确定符号序列（Sk-d），其中所述第一DFE级从Sk-d生成第一后移消除信号，其减少后置ISI 在Y'k信号中，并且从Y'k信号产生其中后端ISI至少部分减小的第一符号估计信号（vk）以及3）第二判决反馈均衡器（DFE）级，用于接收所述Y'k信号并产生第二确定符号序列（Sk-2d），其中所述第二DFE级包括软符号估计器，所述软符号估计器接收所述vk信号并产生软判决序列（S'k-d）包括确定的符号和零输出信号，并且其中第二DFE级从S'k-d生成减少Y'k信号中的前体ISI的前导消除信号。

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