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1.发明授权System and method for non-causal channel equalization using error statistic driven thresholds 有权使用误差统计驱动阈值的非因果信道均衡的系统和方法公开(公告)号：US06915464B1
公开(公告)日：2005-07-05
申请号：US10077332
申请日：2002-02-15
CPC分类号： H04L25/03012
摘要： A system and a method are provided for non-causal channel equalization using error statistics. The method comprises: receiving a non-return to zero (NRZ) data stream input encoded with forward error correction (FEC); establishing a plurality of thresholds to generate a first bit estimate; comparing the first bit estimate in the data stream to a second bit value received prior to the first bit; comparing the first bit estimate to a third bit value received subsequent to the first bit; in response to the comparisons, determining the value of the first bit; FEC decoding the determined first bit value; and, using FEC error statistics to adjust the thresholds by evaluating the number of errors associated with a plurality of three-bit sequence combinations.
摘要翻译： 提供了一种用于使用误差统计的非因果信道均衡的系统和方法。 该方法包括：接收用前向纠错（FEC）编码的不归零（NRZ）数据流输入; 建立多个阈值以产生第一比特估计; 将数据流中的第一比特估计与在第一比特之前接收的第二比特值进行比较; 将所述第一比特估计与所述第一比特之后接收的第三比特值进行比较; 响应于比较，确定第一位的值; FEC解码确定的第一比特值; 并且使用FEC误差统计来通过评估与多个三位序列组合相关联的错误的数量来调整阈值。
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2.发明授权Modified gain non-causal channel equalization using feed-forward and feedback compensation 有权使用前馈和反馈补偿的改进的增益非因果信道均衡公开(公告)号：US07206342B1
公开(公告)日：2007-04-17
申请号：US10652333
申请日：2003-08-29
IPC分类号： H04L27/08
CPC分类号： H04L25/03057 , H04L1/0047 , H04L1/0052 , H04L1/0056
摘要： A modified gain system and method are provided for non-causal channel equalization using feed-forward and feedback compensation. The method comprises: receiving a serial data stream first bit (present) input; comparing a second bit (past) value, received prior to the first bit input, to a third bit (future) value received subsequent to the first bit input; modifying the amplitude of the first bit input to compensate for the effect of the second and third bit values being equal; and, determining the value of the first bit input by comparing the amplitude modified first bit input to a Vopt threshold. When only one of the second and third bit values is a “1” value, a unity amplitude modifier is supplied. When the second and third bit values are a “1”, a low amplitude modifier is supplied. When the second and third bit values are a “0”, a high amplitude modifier is supplied.
摘要翻译： 提供了一种改进的增益系统和方法，用于使用前馈和反馈补偿的非因果信道均衡。 该方法包括：接收串行数据流第一位（存在）输入; 将在第一比特输入之前接收的第二比特（过去）值与在第一比特输入之后接收的第三比特（未来）值进行比较; 修改第一位输入的幅度以补偿第二和第三位值相等的影响; 以及通过将所述幅度修改的第一位输入与Vopt阈值进行比较来确定所述第一位输入的值。 当第二和第三位值中的仅一个值为“1”值时，提供单位幅度调节器。 当第二和第三位值为“1”时，提供低振幅修改器。 当第二和第三位值为“0”时，提供高幅度修改器。
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公开(公告)号：US07054387B2
公开(公告)日：2006-05-30
申请号：US10262334
申请日：2002-10-01
CPC分类号： H04L25/03012 , H04L25/061
摘要： A system and method are provided for feed-forward/feedback non-causal channel equalization in a communications system. The method comprises: receiving a non-return to zero (NRZ) data stream input; using three thresholds, estimating a first bit in the data stream; using two thresholds, determining a third bit value received subsequent to the first bit; comparing the first bit estimate to the third bit value; comparing the first bit estimate to a second bit value received prior to the first bit; and, in response to the comparisons, determining the value of the first bit. In some aspects of the method, the third bit value is determined in response to a prior third bit value determination. Determining a third bit value includes: distinguishing NRZ data stream inputs between fourth and fifth thresholds as a “0” if the prior third bit value was a “1”, and as a “1” if the prior third bit value was a “0”.
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公开(公告)号：US07139325B1
公开(公告)日：2006-11-21
申请号：US10150301
申请日：2002-05-17
IPC分类号： H03D1/06
CPC分类号： H04L25/061 , H04L1/0047 , H04L25/4906 , H04L2025/03356
摘要： A system and method are provided for five-level non-casual channel equalization in a communications system. The method comprises: receiving a non-return to zero (NRZ) data stream input; establishing a five-level threshold; comparing the first bit estimate to a second bit value received prior to the first bit; comparing the first bit estimate to a third bit value received subsequent to the first bit; and, in response to the comparisons, determining the value of the first bit. Establishing a five-level threshold includes: establishing thresholds to distinguish a first bit value when the second and third bit values are a “1” value, when the second bit value is a “1” and the third bit value is a “0”, when the second bit value is a “0” and the third bit value is a “1”, when the second and third bit values are a “0” value, and an approximate midway threshold.
摘要翻译： 在通信系统中提供用于五级非随机信道均衡的系统和方法。 该方法包括：接收不归零（NRZ）数据流输入; 建立五级门槛; 将所述第一比特估计与所述第一比特之前接收的第二比特值进行比较; 将所述第一比特估计与所述第一比特之后接收的第三比特值进行比较; 并且响应于比较，确定第一位的值。 建立五级阈值包括：当第二位值为“1”且第三位值为“0”时，建立阈值以区分第二位值和第三位值为“1”值时的第一位值， 当第二位值为“0”且第三位值为“1”时，当第二位值和第三位值为“0”值时，大致中途阈值。
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公开(公告)号：US07463695B2
公开(公告)日：2008-12-09
申请号：US11487732
申请日：2006-07-17
CPC分类号： H04L25/061 , H04L1/0047 , H04L25/4906 , H04L2025/03356
摘要： A system and method are provided for five-level non-causal channel equalization in a communications system. The method comprises: receiving a non-return to zero (NRZ) data stream input; establishing a five-level threshold; comparing the first bit estimate to a second bit value received prior to the first bit; comparing the first bit estimate to a third bit value received subsequent to the first bit; and, in response to the comparisons, determining the value of the first bit. Establishing a five-level threshold includes: establishing thresholds to distinguish a first bit value when the second and third bit values are a “1” value, when the second bit value is a “1” and the third bit value is a “0”, when the second bit value is a “0” and the third bit value is a “1”, when the second and third bit values are a “0” value, and an approximate midway threshold.
摘要翻译： 在通信系统中提供用于五级非因果信道均衡的系统和方法。 该方法包括：接收不归零（NRZ）数据流输入; 建立五级门槛; 将所述第一比特估计与所述第一比特之前接收的第二比特值进行比较; 将所述第一比特估计与所述第一比特之后接收的第三比特值进行比较; 并且响应于比较，确定第一位的值。 建立五级阈值包括：当第二位值为“1”且第三位值为“0”时，建立阈值以区分第二位值和第三位值为“1”值时的第一位值， 当第二位值为“0”且第三位值为“1”时，当第二位值和第三位值为“0”值时，大致中途阈值。
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公开(公告)号：US07065685B2
公开(公告)日：2006-06-20
申请号：US11116612
申请日：2005-04-29
IPC分类号： H03M13/00
CPC分类号： H04L25/03012
摘要： A system and method are provided for non-causal channel equalization in a communications system. The method comprises: establishing a first threshold (V1) to distinguish a high probability “1” first bit estimate; establishing a second threshold (V0) to distinguish a high probability “0” first bit estimate; establishing a third threshold (Vopt) to distinguish first bit estimates between the first and second thresholds; receiving a non-return to zero (NRZ) data stream; comparing the first bit estimate in the data stream to a second bit value received prior to the first bit; comparing the first bit estimate to a third bit value received subsequent to the first bit; in response to the comparisons, determining the value of the first bit.
摘要翻译： 在通信系统中提供用于非因果信道均衡的系统和方法。 该方法包括：建立第一阈值（V 1）以区分高概率“1”第一比特估计; 建立第二阈值（V 0）以区分高概率“0”第一比特估计; 建立第三阈值（Vopt）以区分第一和第二阈值之间的第一位估计; 接收不归零（NRZ）数据流; 将数据流中的第一比特估计与在第一比特之前接收的第二比特值进行比较; 将所述第一比特估计与所述第一比特之后接收的第三比特值进行比较; 响应于比较，确定第一位的值。
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公开(公告)号：US07024599B2
公开(公告)日：2006-04-04
申请号：US10020426
申请日：2001-12-07
IPC分类号： H03M13/00
CPC分类号： H04L25/03012
摘要： A system and method are provided for non-causal channel equalization in a communications system. The method comprises: receiving a non-return to zero (NRZ) data stream input; establishing thresholds to distinguish a first bit estimate; comparing the first bit estimate in the NRZ data stream to a second bit value received prior to the first bit, and a third bit received subsequent to the first bit; in response to the comparisons, determining the value of the first bit; tracking the NRZ data stream inputs in response to sequential bit value combinations; maintaining long-term averages of the tracked NRZ data stream inputs; adjusting the thresholds in response to the long-term averages; and, offsetting the threshold adjustments to account for the asymmetric noise distribution. Two methods are used to offset the threshold adjustments to account for the asymmetric noise distribution: forward error correction (FEC) decoding and tracking the ratio of bit values.
摘要翻译： 在通信系统中提供用于非因果信道均衡的系统和方法。 该方法包括：接收不归零（NRZ）数据流输入; 建立阈值以区分第一位估计; 将NRZ数据流中的第一比特估计与在第一比特之前接收的第二比特值进行比较，以及在第一比特之后接收的第三比特; 响应于比较，确定第一位的值; 响应于顺序位值组合来跟踪NRZ数据流输入; 维持追踪NRZ数据流输入的长期平均值; 根据长期平均值调整阈值; 并且抵消阈值调整以解决不对称噪声分布。 两种方法用于抵消阈值调整以解决不对称噪声分布：前向纠错（FEC）解码和跟踪比特值的比率。
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8.发明授权Systems and methods for non-casual channel equalization in an asymmetrical noise environment 有权非对称噪声环境下非随机信道均衡的系统和方法公开(公告)号：US06961390B1
公开(公告)日：2005-11-01
申请号：US10066966
申请日：2002-02-04
CPC分类号： H04L25/03012 , H04L25/061
摘要： A system and method are provided for non-causal channel equalization in a communications system. The method comprises: receiving a non-return to zero (NRZ) data stream input; establishing thresholds to distinguish a first bit estimate; comparing the first bit estimate in the NRZ data stream to a second bit value received prior to the first bit, and a third bit received subsequent to the first bit; in response to the comparisons, determining the value of the first bit; tracking the NRZ data stream inputs in response to sequential bit value combinations; maintaining long-term averages of the tracked NRZ data stream inputs; adjusting the thresholds in response to the long-term averages; and, offsetting the threshold adjustments to account for the asymmetric noise distribution. Two methods are used to offset the threshold adjustments to account for the asymmetric noise distribution: forward error correction (FEC) decoding and tracking the ratio of bit values.
摘要翻译： 在通信系统中提供用于非因果信道均衡的系统和方法。 该方法包括：接收不归零（NRZ）数据流输入; 建立阈值以区分第一位估计; 将NRZ数据流中的第一比特估计与在第一比特之前接收的第二比特值进行比较，以及在第一比特之后接收的第三比特; 响应于比较，确定第一位的值; 响应于顺序位值组合来跟踪NRZ数据流输入; 维持追踪NRZ数据流输入的长期平均值; 根据长期平均值调整阈值; 并且抵消阈值调整以解决不对称噪声分布。 两种方法用于抵消阈值调整以解决不对称噪声分布：前向纠错（FEC）解码和跟踪比特值的比率。
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公开(公告)号：US07848404B2
公开(公告)日：2010-12-07
申请号：US11732908
申请日：2007-04-05
申请人： Hongming An , Wei Fu , Allen Merrill , Keith Michael Conroy
发明人： Hongming An , Wei Fu , Allen Merrill , Keith Michael Conroy
CPC分类号： H04L25/03343 , H04L25/028
摘要： A system and method are provided for feed-forward equalization (FFE) in a transmission system. The method accepts a serial stream of input digital data signals. For each input data signal, a temporal sequence of signals is generated. Each of the signals in the temporal sequence is selectively shaped. Shaping map include varying the degree of amplification, modifying the slew rate, or varying the time delay. The contributions of the selectively shaped signals in the temporal sequence are then selectively weighted, and a summed output signal is transmitted.
摘要翻译： 在传输系统中提供用于前馈均衡（FFE）的系统和方法。 该方法接受输入数字数据信号的串行流。 对于每个输入数据信号，产生信号的时间序列。 时间序列中的每个信号被选择成形。 整形图包括改变放大程度，修改压摆率或改变时间延迟。 然后选择性地加权在时间序列中的选择性成形的信号的贡献，并且传送求和的输出信号。
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公开(公告)号：US20080247453A1
公开(公告)日：2008-10-09
申请号：US11732908
申请日：2007-04-05
申请人： Hongming An , Wei Fu , Allen Merrill , Keith Michael Conroy
发明人： Hongming An , Wei Fu , Allen Merrill , Keith Michael Conroy
IPC分类号： H03H7/30
CPC分类号： H04L25/03343 , H04L25/028
摘要： A system and method are provided for feed-forward equalization (FFE) in a transmission system. The method accepts a serial stream of input digital data signals. For each input data signal, a temporal sequence of signals is generated. Each of the signals in the temporal sequence is selectively shaped. Shaping map include varying the degree of amplification, modifying the slew rate, or varying the time delay. The contributions of the selectively shaped signals in the temporal sequence are then selectively weighted, and a summed output signal is transmitted.
摘要翻译： 在传输系统中提供用于前馈均衡（FFE）的系统和方法。 该方法接受输入数字数据信号的串行流。 对于每个输入数据信号，产生信号的时间序列。 时间序列中的每个信号被选择成形。 整形图包括改变放大程度，修改压摆率或改变时间延迟。 然后选择性地加权在时间序列中的选择性成形的信号的贡献，并且传送求和的输出信号。
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