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51. 发明授权

US06898238B2 Apparatus for, and method of, reducing power dissipation in a communications system 失效
标题翻译：用于降低通信系统功耗的装置和方法
公开(公告)号：US06898238B2
公开(公告)日：2005-05-24
申请号：US09930584
申请日：2001-08-15
申请人： Oscar E. Agazzi , John L. Creigh , Mehdi Hatamian
发明人： Oscar E. Agazzi , John L. Creigh , Mehdi Hatamian
IPC分类号： H04B3/32 , H04B3/46 , H03H7/30
CPC分类号： H04B3/32 , H04B3/487
摘要： A method is provided for reducing power dissipation within a communications system having a plurality of adaptive filters with a plurality of taps, each tap is switchable between an active and an inactive state, each tap also has a coefficient. An acceptable error for the system is specified. This error is typically the mean squared error of the system. A tap threshold is set for each active tap. Those taps having a coefficient with an absolute value less than the tap threshold set for the active tap are deactivated. The error of the system is computed and compared to the acceptable system error. If the computed system error is less than the acceptable system error, the tap threshold for each active tap is increased. The process of comparing the tap coefficients to the tap thresholds, deactivating taps with a coefficient less than the tap threshold and computing the resulting system error is repeated until the computed system error approaches the acceptable system error without exceeding the acceptable system error. In addition, the previously deactivated taps may be periodically activated and their coefficients once again compared to the tap threshold. If a coefficient is less than the tap threshold the tap is again deactivated. If a coefficient is greater than the tap threshold, the tap remains active.
摘要翻译：提供一种用于降低具有多个抽头的多个自适应滤波器的通信系统内的功率耗散的方法，每个抽头可在有源和非活动状态之间切换，每个抽头也具有系数。指定系统可接受的错误。该错误通常是系统的均方误差。为每个活动水龙头设置水龙头阈值。具有绝对值小于为有源抽头设置的抽头阈值的系数的那些抽头被去激活。计算系统的误差并与可接受的系统误差进行比较。如果计算出的系统误差小于可接受的系统误差，则每个有源抽头的抽头阈值将增加。将抽头系数与抽头阈值进行比较的过程，重复使用小于抽头阈值的系数去激活抽头并计算所得到的系统误差，直到计算出的系统误差在不超过可接受的系统误差的情况下接近可接受的系统误差为止。此外，可以周期性地激活先前停用的抽头，并且它们的系数再次与抽头阈值相比较。如果系数小于抽头阈值，则再次停用抽头。如果系数大于抽头阈值，则继电器保持有效。

52. 发明授权

US06304598B1 Apparatus for, and method of, reducing power dissipation in a communications system 失效
标题翻译：用于降低通信系统功耗的装置和方法
公开(公告)号：US06304598B1
公开(公告)日：2001-10-16
申请号：US09143476
申请日：1998-08-28
申请人： Oscar E. Agazzi , John L. Creigh , Mehdi Hatamian
发明人： Oscar E. Agazzi , John L. Creigh , Mehdi Hatamian
IPC分类号： H03H730
CPC分类号： H04B3/32 , H04B3/487
摘要： A method is provided for reducing power dissipation within a communications system having a plurality of adaptive filters with a plurality of taps, each tap is switchable between an active and an inactive state, each tap also has a coefficient. An acceptable error for the system is specified. This error is typically the mean squared error of the system. A tap threshold is set for each active tap. Those taps having a coefficient with an absolute value less than the tap threshold set for the active tap are deactivated. The error of the system is computed and compared to the acceptable system error. If the computed system error is less than the acceptable system error, the tap threshold for each active tap is increased. The process of comparing the tap coefficients to the tap thresholds, deactivating taps with a coefficient less than the tap threshold and computing the resulting system error is repeated until the computed system error approaches the acceptable system error without exceeding the acceptable system error. In addition, the previously deactivated taps may be periodically activated and their coefficients once again compared to the tap threshold. If a coefficient is less than the tap threshold the tap is again deactivated. If a coefficient is greater than the tap threshold, the tap remains active.
摘要翻译：提供一种用于降低具有多个抽头的多个自适应滤波器的通信系统内的功率耗散的方法，每个抽头可在有源和非活动状态之间切换，每个抽头也具有系数。指定系统可接受的错误。该错误通常是系统的均方误差。为每个活动水龙头设置水龙头阈值。具有绝对值小于为有源抽头设置的抽头阈值的系数的那些抽头被去激活。计算系统的误差并与可接受的系统误差进行比较。如果计算出的系统误差小于可接受的系统误差，则每个有源抽头的抽头阈值将增加。将抽头系数与抽头阈值进行比较的过程，重复使用小于抽头阈值的系数去激活抽头并计算所得到的系统误差，直到计算出的系统误差在不超过可接受的系统误差的情况下接近可接受的系统误差为止。此外，可以周期性地激活先前停用的抽头，并且它们的系数再次与抽头阈值相比较。如果系数小于抽头阈值，则再次停用抽头。如果系数大于抽头阈值，则继电器保持有效。

53. 发明申请

US20100135372A1 Demodulator for a Multi-Pair Gigabit Transceiver 有权
标题翻译：用于多对千兆位收发器的解调器
公开(公告)号：US20100135372A1
公开(公告)日：2010-06-03
申请号：US12698639
申请日：2010-02-02
申请人： Oscar E. Agazzi , David Kruse , Arthur Abnous , Mehdi Hatamian
发明人： Oscar E. Agazzi , David Kruse , Arthur Abnous , Mehdi Hatamian
IPC分类号： H04B1/38 , H04B1/10
CPC分类号： H04L7/0062 , G01R31/3004 , G01R31/3008 , G01R31/3016 , G01R31/31715 , G01R31/318502 , G01R31/318552 , G01R31/318594 , H04B3/23 , H04B3/32 , H04L1/0054 , H04L1/006 , H04L1/242 , H04L7/0334 , H04L25/03038 , H04L25/03057 , H04L25/03146 , H04L25/03267 , H04L25/067 , H04L25/14 , H04L25/4917 , H04L25/497 , H04L2025/03363 , H04L2025/03369 , H04L2025/03477 , H04L2025/0349 , H04L2025/03496 , H04L2025/03503 , H04L2025/03617 , H04L2025/03745
摘要： A feedforward equalizer for equalizing a sequence of signal samples received by a receiver from a remote transmitter. The feedforward equalizer has a gain and is included in the receiver which includes a timing recovery module for setting a sampling phase and a decoder. The feedforward equalizer comprises a non-adaptive filter and a gain stage. The non-adaptive filter receives the signal samples and produces a filtered signal. The gain stage adjusts the gain of the feedforward equalizer by adjusting the amplitude of the filtered signal. The amplitude of the filtered signal is adjusted so that it fits in the operational range of the decoder. The feedforward equalizer does not affect the sampling phase setting of the timing recovery module of the receiver.
摘要翻译：前馈均衡器，用于均衡来自远程发射机的接收机接收的信号样本序列。前馈均衡器具有增益并且被包括在接收机中，该接收机包括用于设置采样相位和解码器的定时恢复模块。前馈均衡器包括非自适应滤波器和增益级。非自适应滤波器接收信号样本并产生滤波信号。增益级通过调整滤波信号的幅度来调节前馈均衡器的增益。调整滤波后的信号的幅度使其适合于解码器的操作范围。前馈均衡器不影响接收机的定时恢复模块的采样相位设置。

54. 发明授权

US07434134B2 System and method for trellis decoding in a multi-pair transceiver system 有权
标题翻译：用于多对收发器系统中网格解码的系统和方法
公开(公告)号：US07434134B2
公开(公告)日：2008-10-07
申请号：US10798675
申请日：2004-03-11
申请人： Oscar E. Agazzi , David Kruse , Arthur Abnous , Mehdi Hatamian
发明人： Oscar E. Agazzi , David Kruse , Arthur Abnous , Mehdi Hatamian
IPC分类号： H03M13/00
CPC分类号： H04L7/0062 , G01R31/3004 , G01R31/3008 , G01R31/3016 , G01R31/31715 , G01R31/318502 , G01R31/318552 , G01R31/318594 , H04B3/23 , H04B3/32 , H04L1/0054 , H04L1/0059 , H04L1/242 , H04L7/0334 , H04L25/03038 , H04L25/03057 , H04L25/03146 , H04L25/03267 , H04L25/067 , H04L25/14 , H04L25/4917 , H04L25/497 , H04L2025/03363 , H04L2025/03369 , H04L2025/03477 , H04L2025/0349 , H04L2025/03496 , H04L2025/03503 , H04L2025/03617 , H04L2025/03745
摘要： A method and a system for decoding information signals encoded in accordance with a multi-state encoding scheme and transmitted over a multi-dimensional transmission channel by computing a distance of a received word from a codeword. One-dimensional (1D) input signals are processed in a pair of symbol decoders, implemented as look-up tables, to produce a pair of 1D errors, with each representing a distance metric between the input signal and a symbol in one of two disjoint symbol-subsets. The 1D errors are combined based on the multi-state encoding scheme in order to produce a set of multi-dimensional error terms. Each of the multi-dimensional error terms corresponds to a distance between a received word and a nearest codeword.
摘要翻译：一种用于对根据多状态编码方案编码并通过计算从码字的接收字的距离而在多维传输信道上传送的信息信号的方法和系统。一维（1D）输入信号在一对符号解码器中被处理，被实现为查找表，以产生一对1D误差，其中每一个代表在两个不相交中的一个中的输入信号和符号之间的距离度量符号子集。基于多状态编码方案组合1D误差，以产生一组多维误差项。多维误差项中的每一个对应于接收到的字和最近的码字之间的距离。

55. 发明授权

US06959038B2 High-speed decoder for a multi-pair gigabit transceiver 有权
标题翻译：用于多对千兆位收发器的高速解码器
公开(公告)号：US06959038B2
公开(公告)日：2005-10-25
申请号：US09794309
申请日：2001-02-27
申请人： Oscar E. Agazzi , David Kruse , Arthur Abnous , Mehdi Hatamian
发明人： Oscar E. Agazzi , David Kruse , Arthur Abnous , Mehdi Hatamian
IPC分类号： G01R31/30 , G01R31/317 , G01R31/3185 , H04B3/23 , H04B3/32 , H04L1/00 , H04L1/24 , H04L7/02 , H04L7/033 , H04L25/03 , H04L25/06 , H04L25/14 , H04L25/49 , H04L25/497 , H03H7/30
CPC分类号： H04L7/0062 , G01R31/3004 , G01R31/3008 , G01R31/3016 , G01R31/31715 , G01R31/318502 , G01R31/318552 , G01R31/318594 , H03M13/256 , H03M13/41 , H03M13/6331 , H04B3/23 , H04B3/32 , H04L1/005 , H04L1/0052 , H04L1/0054 , H04L1/0059 , H04L1/242 , H04L7/0334 , H04L25/03038 , H04L25/03057 , H04L25/03146 , H04L25/03267 , H04L25/067 , H04L25/14 , H04L25/4917 , H04L25/497 , H04L2025/03363 , H04L2025/03369 , H04L2025/03477 , H04L2025/0349 , H04L2025/03496 , H04L2025/03503 , H04L2025/03617 , H04L2025/03745
摘要： A method and a system for providing an input signal from a multiple decision feedback equalizer to a decoder based on a tail value and a subset of coefficient values received from a decision-feedback equalizer. A set of pre-computed values based on the subset of coefficient values is generated. Each of the pre-computed values is combined with the tail value to generate a tentative sample. One of the tentative samples is selected as the input signal to the decoder. In one aspect of the system, tentative samples are saturated and then stored in a set of registers before being outputted to a multiplexer which selects one of the tentative samples as the input signal to the decoder. This operation of storing the tentative samples in the registers before providing the tentative samples to the multiplexer facilitates high-speed operation by breaking up a critical path of computations into substantially balanced first and second portions, the first portion including computations in the decision-feedback equalizer and the multiple decision feedback equalizer, the second portion including computations in the decoder.
摘要翻译：一种用于基于从判决反馈均衡器接收的尾值和系数值的子集，将来自多决策反馈均衡器的输入信号提供给解码器的方法和系统。产生一组基于系数值子集的预计算值。每个预先计算的值与尾值组合以生成临时样本。选择一个暂定样本作为解码器的输入信号。在系统的一个方面，暂定样本被饱和，然后被存储在一组寄存器中，然后被输出到多路复用器，其选择一个暂定样本作为解码器的输入信号。在将暂定样本提供给多路复用器之前将暂定样本存储在寄存器中的这种操作便于通过将计算的关键路径分解为基本上平衡的第一和第二部分进行高速操作，第一部分包括判决反馈均衡器和多个判决反馈均衡器，第二部分包括解码器中的计算。

56. 发明授权

US08201045B2 System and method for trellis decoding in a multi-pair transceiver system 有权
标题翻译：用于多对收发器系统中网格解码的系统和方法
公开(公告)号：US08201045B2
公开(公告)日：2012-06-12
申请号：US12247064
申请日：2008-10-07
申请人： Oscar E. Agazzi , David Kruse , Arthur Abnous , Mehdi Hatamian
发明人： Oscar E. Agazzi , David Kruse , Arthur Abnous , Mehdi Hatamian
IPC分类号： H03M13/00
CPC分类号： H04L7/0062 , G01R31/3004 , G01R31/3008 , G01R31/3016 , G01R31/31715 , G01R31/318502 , G01R31/318552 , G01R31/318594 , H04B3/23 , H04B3/32 , H04L1/0054 , H04L1/0059 , H04L1/242 , H04L7/0334 , H04L25/03038 , H04L25/03057 , H04L25/03146 , H04L25/03267 , H04L25/067 , H04L25/14 , H04L25/4917 , H04L25/497 , H04L2025/03363 , H04L2025/03369 , H04L2025/03477 , H04L2025/0349 , H04L2025/03496 , H04L2025/03503 , H04L2025/03617 , H04L2025/03745
摘要： A method and a system for decoding information signals encoded in accordance with a multi-state encoding scheme and transmitted over a multi-dimensional transmission channel by computing a distance of a received word from a codeword. One-dimensional (1D) input signals are processed in a pair of symbol decoders, implemented as look-up tables, to produce a pair of 1D errors, with each representing a distance metric between the input signal and a symbol in one of two disjoint symbol-subsets. The 1D errors are combined based on the multi-state encoding scheme in order to produce a set of multi-dimensional error terms. Each of the multi-dimensional error terms corresponds to a distance between a received word and a nearest codeword.
摘要翻译：一种用于对根据多状态编码方案编码并通过计算从码字的接收字的距离而在多维传输信道上传送的信息信号的方法和系统。一维（1D）输入信号在一对符号解码器中被处理，被实现为查找表，以产生一对1D误差，其中每一个代表在两个不相交中的一个中的输入信号和符号之间的距离度量符号子集。基于多状态编码方案组合1D误差，以产生一组多维误差项。多维误差项中的每一个对应于接收到的字和最近的码字之间的距离。

57. 发明授权

US07711077B2 System and method for high-speed decoding and ISI compensation in a multi-pair transceiver system 失效
标题翻译：多对收发器系统中的高速解码和ISI补偿的系统和方法
公开(公告)号：US07711077B2
公开(公告)日：2010-05-04
申请号：US12269697
申请日：2008-11-12
申请人： Oscar E. Agazzi , David Kruse , Arthur Abnous , Mehdi Hatamian
发明人： Oscar E. Agazzi , David Kruse , Arthur Abnous , Mehdi Hatamian
IPC分类号： H04B1/10 , H03D1/06
CPC分类号： H04L7/0062 , G01R31/3004 , G01R31/3008 , G01R31/3016 , G01R31/31715 , G01R31/318502 , G01R31/318552 , G01R31/318594 , H03M13/256 , H03M13/41 , H04B3/23 , H04B3/32 , H04L1/0054 , H04L1/0059 , H04L1/242 , H04L7/0334 , H04L25/03038 , H04L25/03057 , H04L25/03146 , H04L25/03203 , H04L25/03267 , H04L25/03324 , H04L25/067 , H04L25/14 , H04L25/4917 , H04L25/497 , H04L2025/03363 , H04L2025/03369 , H04L2025/03458 , H04L2025/03477 , H04L2025/0349 , H04L2025/03496 , H04L2025/03503 , H04L2025/03617 , H04L2025/03643 , H04L2025/03745
摘要： A method and a system for providing ISI compensation to an input signal in a bifurcated manner. ISI compensation is provided in two stages, a first stage compensates ISI components induced by characteristics of a transmitter's partial response pulse shaping filter, a second stage compensates ISI components induced by characteristics of a multi-pair transmission channel. First stage ISI compensation is performed in an inverse response filter having a characteristic feedback gain factor K, during system start-up. Second stage ISI compensation is performed by a single DFE in combination with a MDFE operating on tentative decisions output from a Viterbi decoder. As the DFE of the second stage reaches convergence, the feedback gain factor K of the first stage is ramped to zero.
摘要翻译：一种用于以分叉方式向输入信号提供ISI补偿的方法和系统。 ISI补偿分两阶段提供，第一级补偿由发射机的部分响应脉冲整形滤波器的特性引起的ISI分量，第二级补偿由多对传输信道的特性引起的ISI分量。在系统启动期间，在具有特性反馈增益因子K的逆响应滤波器中执行第一级ISI补偿。第二级ISI补偿由单个DFE与由维特比解码器输出的暂定决定操作的MDFE组合执行。当第二级的DFE达到收敛时，第一级的反馈增益因子K变为零。

58. 发明授权

US06226332B1 Multi-pair transceiver decoder system with low computation slicer 有权
标题翻译：具有低计算限幅器的多对收发器解码器系统
公开(公告)号：US06226332B1
公开(公告)日：2001-05-01
申请号：US09370353
申请日：1999-08-09
申请人： Oscar E. Agazzi , David Kruse , Arthur Abnous , Mehdi Hatamian
发明人： Oscar E. Agazzi , David Kruse , Arthur Abnous , Mehdi Hatamian
IPC分类号： H04L2534
CPC分类号： H04L7/0062 , G01R31/3004 , G01R31/3008 , G01R31/3016 , G01R31/31715 , G01R31/318502 , G01R31/318552 , G01R31/318594 , H04B3/23 , H04B3/32 , H04L1/0047 , H04L1/0054 , H04L1/242 , H04L7/0334 , H04L25/03038 , H04L25/03057 , H04L25/03146 , H04L25/03267 , H04L25/03885 , H04L25/067 , H04L25/14 , H04L25/4917 , H04L25/497 , H04L2025/03363 , H04L2025/03369 , H04L2025/03477 , H04L2025/0349 , H04L2025/03496 , H04L2025/03503 , H04L2025/03617 , H04L2025/03745
摘要： A method and a system for decoding information signals encoded by a multi-state encoding architecture and transmitted over a multi-dimensional transmission channel by computing a distance of a received word from a codeword. One-dimensional (1D) input signals are detected in a symbol decoder, implemented using look-up tables, to produce a pair of 1D errors, with each representing a distance metric between the input signal and a symbol in one of two disjoint symbol-subsets. The symbol decoder is implemented as a pair of slicers, each detecting an input signal with respect to one of two disjoint symbol-subsets. A third slicer detects the input with respect to the union of the two disjoint symbol-subsets. Decisions from the first, second and third slicers are processed to define 1D square error terms expressed in Hamming metrics. Reduced bit count error terms allow follow-on error processing to be performed with a minimum of computational complexity. The 1D errors are combined to produce a set of multi-dimensional error terms. Each of the multi-dimensional error terms corresponds to a distance between a received word and a nearest codeword.
摘要翻译：一种用于对由多状态编码架构编码的信息信号进行解码并通过计算从码字的接收字的距离而在多维传输信道上传输的方法和系统。在使用查找表实现的符号解码器中检测一维（1D）输入信号，以产生一对1D误差，其中每一个代表在两个不相交符号的一个中的输入信号和符号之间的距离度量，子集符号解码器被实现为一对限幅器，每个限幅器相对于两个不相交符号子集之一检测输入信号。第三个切片器检测相对于两个不相交符号子集合的输入。处理来自第一，第二和第三限幅器的决策，以定义用Hamming度量表示的1D平方误差项。减少位计数误差项允许以最小的计算复杂度执行后续的误差处理。 1D误差被组合以产生一组多维误差项。多维误差项中的每一个对应于接收到的字和最近的码字之间的距离。

59. 发明授权

US06721916B2 System and method for trellis decoding in a multi-pair transceiver system 有权
标题翻译：用于多对收发器系统中网格解码的系统和方法
公开(公告)号：US06721916B2
公开(公告)日：2004-04-13
申请号：US09858990
申请日：2001-05-15
申请人： Oscar E. Agazzi , David Kruse , Arthur Abnous , Mehdi Hatamian
发明人： Oscar E. Agazzi , David Kruse , Arthur Abnous , Mehdi Hatamian
IPC分类号： H03M1303
CPC分类号： H04L7/0062 , G01R31/3004 , G01R31/3008 , G01R31/3016 , G01R31/31715 , G01R31/318502 , G01R31/318552 , G01R31/318594 , H04B3/23 , H04B3/32 , H04L1/0054 , H04L1/0059 , H04L1/242 , H04L7/0334 , H04L25/03038 , H04L25/03057 , H04L25/03146 , H04L25/03267 , H04L25/067 , H04L25/14 , H04L25/4917 , H04L25/497 , H04L2025/03363 , H04L2025/03369 , H04L2025/03477 , H04L2025/0349 , H04L2025/03496 , H04L2025/03503 , H04L2025/03617 , H04L2025/03745
摘要： A method and a system for decoding information signals encoded in accordance with a multi-state encoding scheme and transmitted over a multi-dimensional transmission channel by computing a distance of a received word from a codeword. One-dimensional (1D) input signals are processed in a pair of symbol decoders, implemented as look-up tables, to produce a pair of 1D errors, with each representing a distance metric between the input signal and a symbol in a set of symbols. The 1D errors are combined based on the multi-state encoding scheme in order to produce a set of multi-dimensional error terms. Each of the multi-dimensional error terms corresponds to a distance between a received word and a nearest codeword.
摘要翻译：一种用于对根据多状态编码方案编码并通过计算从码字的接收字的距离而在多维传输信道上传送的信息信号的方法和系统。一维（1D）输入信号在一对符号解码器中被处理，被实现为查找表，以产生一对1D误差，每一个代表一个输入信号和一组符号中的符号之间的距离度量。基于多状态编码方案组合1D误差，以产生一组多维误差项。多维误差项中的每一个对应于接收到的字和最近的码字之间的距离。

60. 发明授权

US08320443B2 System and method for high-speed decoding and ISI compensation in a multi-pair transceiver system 有权
标题翻译：多对收发器系统中的高速解码和ISI补偿的系统和方法
公开(公告)号：US08320443B2
公开(公告)日：2012-11-27
申请号：US12768817
申请日：2010-04-28
申请人： Oscar E. Agazzi , David Kruse , Arthur Abnous , Mehdi Hatamian
发明人： Oscar E. Agazzi , David Kruse , Arthur Abnous , Mehdi Hatamian
IPC分类号： H03H7/40
CPC分类号： H04L7/0062 , G01R31/3004 , G01R31/3008 , G01R31/3016 , G01R31/31715 , G01R31/318502 , G01R31/318552 , G01R31/318594 , H03M13/256 , H03M13/41 , H04B3/23 , H04B3/32 , H04L1/0054 , H04L1/0059 , H04L1/242 , H04L7/0334 , H04L25/03038 , H04L25/03057 , H04L25/03146 , H04L25/03203 , H04L25/03267 , H04L25/03324 , H04L25/067 , H04L25/14 , H04L25/4917 , H04L25/497 , H04L2025/03363 , H04L2025/03369 , H04L2025/03458 , H04L2025/03477 , H04L2025/0349 , H04L2025/03496 , H04L2025/03503 , H04L2025/03617 , H04L2025/03643 , H04L2025/03745
摘要： A method and a system for providing ISI compensation to an input signal in a bifurcated manner. ISI compensation is provided in two stages, a first stage compensates ISI components induced by characteristics of a transmitter's partial response pulse shaping filter, a second stage compensates ISI components induced by characteristics of a multi-pair transmission channel. First stage ISI compensation is performed in an inverse response filter having a characteristic feedback gain factor K, during system start-up. Second stage ISI compensation is performed by a single DFE in combination with a MDFE operating on tentative decisions output from a Viterbi decoder. As the DFE of the second stage reaches convergence, the feedback gain factor K of the first stage is ramped to zero.
摘要翻译：一种用于以分叉方式向输入信号提供ISI补偿的方法和系统。 ISI补偿分两阶段提供，第一阶段补偿由发射机的部分响应脉冲整形滤波器的特性引起的ISI分量，第二级补偿由多对传输信道的特性引起的ISI分量。在系统启动期间，在具有特性反馈增益因子K的逆响应滤波器中执行第一级ISI补偿。第二级ISI补偿由单个DFE与由维特比解码器输出的暂定决定操作的MDFE组合执行。当第二级的DFE达到收敛时，第一级的反馈增益因子K变为零。

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