公开(公告)号：US20060034363A1

公开(公告)日：2006-02-16

申请号：US11251751

申请日：2005-10-18

申请人： Chin-Liang Wang ,  Yuan-Shuo Chang ,  Chih-Ming Hsu

发明人： Chin-Liang Wang ,  Yuan-Shuo Chang ,  Chih-Ming Hsu

IPC分类号： H03H7/30

CPC分类号： H04L25/03057 ,  H04L27/2647 ,  H04L2025/03617

摘要： A novel structure for the TEQ in a DMT system receiver to shorten the length of the effective channel impulse response is provided. A time-domain equalizer, based on the decision-feedback filter structure, along with a training method is disclosed. In accordance with the DFE-based TEQ in the DMT system, the data symbols that transmitted through the effective shortened channel would be more reliable.

公开(公告)号：US20070121718A1

公开(公告)日：2007-05-31

申请号：US11668012

申请日：2007-01-29

申请人： Chin-Liang WANG ,  Yuan-Shuo Chang

发明人： Chin-Liang WANG ,  Yuan-Shuo Chang

IPC分类号： H03H7/30 ,  H04L5/12 ,  H04B1/10

CPC分类号： H04L25/03057 ,  H04L27/2647 ,  H04L2025/03617

摘要： A novel time-domain equalizer (TEQ) is provided for the receiver of a Discrete Multi-tone (DMT) system to shorten the length of the effective channel impulse response. The TEQ is based on a variant of the conventional decision-feedback equalizer (DFE) structure along with a training method for the TEQ settings. By using this DFE-based TEQ for DMT systems, the data symbols transmitted through the effective shortened channel would be more reliable.

摘要翻译： 为离散多音调（DMT）系统的接收机提供新颖的时域均衡器（TEQ），以缩短有效信道脉冲响应的长度。 TEQ基于传统的判决反馈均衡器（DFE）结构的变体以及TEQ设置的训练方法。 通过将这种基于DFE的TEQ用于DMT系统，通过有效缩短的信道传输的数据符号将更加可靠。

公开(公告)号：US06704367B1

公开(公告)日：2004-03-09

申请号：US09625652

申请日：2000-07-26

申请人： Chin-Liang Wang ,  Yuan-Shuo Chang

发明人： Chin-Liang Wang ,  Yuan-Shuo Chang

IPC分类号： H04J100

CPC分类号： H04L27/2608

摘要： A discrete loading algorithm maximizes data rate or system performance margin for discrete multitone (DMT) transmission. A preliminary bit assignment for each subchannel is first obtained by optimizing a DMT system with an available bandwidth. The subchannels that receive negative bit assignments are then excluded for further optimization until all the bit assignments are positive. The bit assignment of each subchannel is rounded and a corresponding rounding error is calculated. If the total bit number of the bit assignments are greater than the available bandwidth, the bit assignment of the subchannel having the least rounding error is decreased by one bit. If the total bit number of the bit assignments are smaller than the available bandwidth, the bit assignment of the subchannel having the largest rounding error is increased by one bit.

摘要翻译： 离散加载算法使离散多音（DMT）传输的数据速率或系统性能裕度最大化。 首先通过优化具有可用带宽的DMT系统来获得每个子信道的初步位分配。 然后排除接收负位分配的子通道进一步优化，直到所有位分配为正。 每个子通道的位分配被舍入，并且计算相应的舍入误差。 如果比特分配的总比特数大于可用带宽，则具有最小舍入误差的子信道的比特分配减少一比特。 如果比特分配的总比特数小于可用带宽，则具有最大舍入误差的子信道的比特分配增加1比特。

公开(公告)号：US20080212715A1

公开(公告)日：2008-09-04

申请号：US11905882

申请日：2007-10-05

申请人： Yuan-Shuo Chang

发明人： Yuan-Shuo Chang

IPC分类号： H04L25/06

CPC分类号： H04L25/061 ,  H04L25/4919

摘要： An embodiment of the proposed invention is primarily applied to compensate the BLW in communication systems using THPs in their transmitters, especially suitable for the 10GBase-T Ethernet application. The present apparatus includes an additional decision device (slicer) used to generate DC offset information (error signal) and an extra modulus unit after our BLW compensator to reconvert compensated symbols to correct 16-PAM signals. In addition, the estimated error signals in our method are generated from the difference between the input of the BLW compensator and the output of the decision device. These error signals are then weighted to alleviate the impact of erroneous DC offset information on the performance of the BLW compensator. Therefore, a more direct and accurate DC offset information can be derived to improve the inaccurate BLW estimation in previous works.

摘要翻译： 所提出的发明的实施例主要应用于在其发射机中使用THP的通信系统中的BLW进行补偿，特别适用于10GBase-T以太网应用。 本装置包括用于在我们的BLW补偿器之后产生DC偏移信息（误差信号）和额外模数单位的附加判定装置（限幅器），以重新补偿补偿符号以校正16-PAM信号。 此外，我们的方法中的估计误差信号是由BLW补偿器的输入与判决装置的输出之间的差异产生的。 然后对这些误差信号进行加权，以减轻错误的DC偏移信息对BLW补偿器的性能的影响。 因此，可以导出更直接和准确的DC偏移信息，以改善以前的作品中的不准确的BLW估计。

公开(公告)号：US08417193B2

公开(公告)日：2013-04-09

申请号：US12794787

申请日：2010-06-07

申请人： Yuan-Shuo Chang

发明人： Yuan-Shuo Chang

IPC分类号： H04B1/38

CPC分类号： H03F1/3241 ,  H03F3/24

摘要： The present invention provides a transmitting device and a method for determining a target predistortion setting value. The transmitting device comprises: a setting value control unit, a predistortion unit, a transmitting circuit, a receiving circuit, and a determining unit. The present invention can predistort signals before a power amplifier in a transmitting device by a method of determining a target predistortion setting value (i.e. an optimal predistortion setting value) from a plurality of candidate predistortion setting values. In this way, signals outputted by the power amplifier in the transmitting device can be adjusted to an optimal state, so as to solve the distortion problem of the outputted signals of the power amplifier.

摘要翻译： 本发明提供一种用于确定目标预失真设定值的发送装置和方法。 发送装置包括：设置值控制单元，预失真单元，发送电路，接收电路和确定单元。 本发明可以通过从多个候选预失真设定值确定目标预失真设定值（即，最佳预失真设定值）的方法，在发送设备中的功率放大器之前预失真信号。 以这种方式，可以将发送装置中的功率放大器输出的信号调整到最佳状态，以解决功率放大器的输出信号的失真问题。

公开(公告)号：US20100311351A1

公开(公告)日：2010-12-09

申请号：US12794787

申请日：2010-06-07

申请人： Yuan-Shuo Chang

发明人： Yuan-Shuo Chang

IPC分类号： H04B1/38

CPC分类号： H03F1/3241 ,  H03F3/24

摘要： The present invention provides a transmitting device and a method for determining a target predistortion setting value. The transmitting device comprises: a setting value control unit, a predistortion unit, a transmitting circuit, a receiving circuit, and a determining unit. The present invention can predistort signals before a power amplifier in a transmitting device by a method of determining a target predistortion setting value (i.e. an optimal predistortion setting value) from a plurality of candidate predistortion setting values. In this way, signals outputted by the power amplifier in the transmitting device can be adjusted to an optimal state, so as to solve the distortion problem of the outputted signals of the power amplifier.

摘要翻译： 本发明提供一种用于确定目标预失真设定值的发送装置和方法。 发送装置包括：设置值控制单元，预失真单元，发送电路，接收电路和确定单元。 本发明可以通过从多个候选预失真设定值确定目标预失真设定值（即，最佳预失真设定值）的方法，在发送设备中的功率放大器之前预失真信号。 以这种方式，可以将发送装置中的功率放大器输出的信号调整到最佳状态，以解决功率放大器的输出信号的失真问题。

公开(公告)号：US20100311360A1

公开(公告)日：2010-12-09

申请号：US12795642

申请日：2010-06-07

申请人： Fong-Ching Huang ,  Yuan-Shuo Chang

发明人： Fong-Ching Huang ,  Yuan-Shuo Chang

IPC分类号： H04B1/04

CPC分类号： H03F1/3241 ,  H03F3/24

摘要： A transmitter includes a predistortion calculation unit, a transmitting circuit, a receiving circuit, an adjusting unit and a parameter generating and storing unit. The predistortion calculation unit is utilized for pre-distorting an input signal to generate a predistorted input signal according to a specific predistortion parameter. The transmitting circuit is utilized for processing the predistorted input signal to generate an output signal. The receiving circuit is utilized for receiving the output signal to generate a received signal. The adjusting unit is utilized for adjusting the received signal to generate an adjusted signal, where the adjusted signal is substantially equal to the input signal. The parameter generating and storing unit is utilized for generating the specific predistortion parameter, and updating at least one stored predistortion parameter according to the input signal and the adjusted signal.

摘要翻译： 发射机包括预失真计算单元，发射电路，接收电路，调整单元和参数产生和存储单元。 预失真计算单元用于预失真输入信号以根据特定预失真参数产生预失真输入信号。 发送电路用于处理预失真输入信号以产生输出信号。 接收电路用于接收输出信号以产生接收信号。 调整单元用于调整接收信号以产生经调整的信号，其中调整后的信号基本上等于输入信号。 参数产生和存储单元用于产生特定的预失真参数，并根据输入信号和调整后的信号更新至少一个存储的预失真参数。

公开(公告)号：US20120230451A1

公开(公告)日：2012-09-13

申请号：US13409126

申请日：2012-03-01

申请人： Yuan-Shuo Chang

发明人： Yuan-Shuo Chang

IPC分类号： H04L27/06

CPC分类号： H04L25/06 ,  H04L25/061

摘要： A direct current (DC) offset estimation device includes a determining circuit and an estimation circuit. The determining circuit is arranged for comparing a plurality of bits of an access code in a packet with a first predetermined value, respectively, and accordingly generating a determining result. The estimation circuit is coupled to the determining circuit, for estimating a DC offset according to the determining result.

摘要翻译： 直流（DC）偏移估计装置包括确定电路和估计电路。 确定电路被布置为分别将分组中的访问代码的多个比特与第一预定值进行比较，并且因此产生确定结果。 估计电路耦合到确定电路，用于根据确定结果估计DC偏移。

公开(公告)号：US08107573B2

公开(公告)日：2012-01-31

申请号：US11905882

申请日：2007-10-05

申请人： Yuan-Shuo Chang

发明人： Yuan-Shuo Chang

IPC分类号： H04L25/06

CPC分类号： H04L25/061 ,  H04L25/4919

摘要： An embodiment of the proposed invention is primarily applied to compensate the BLW in communication systems using THPs in their transmitters, especially suitable for the 10GBase-T Ethernet application. The present apparatus includes an additional decision device (slicer) used to generate DC offset information (error signal) and an extra modulus unit after our BLW compensator to reconvert compensated symbols to correct 16-PAM signals. In addition, the estimated error signals in our method are generated from the difference between the input of the BLW compensator and the output of the decision device. These error signals are then weighted to alleviate the impact of erroneous DC offset information on the performance of the BLW compensator. Therefore, a more direct and accurate DC offset information can be derived to improve the inaccurate BLW estimation in previous works.

摘要翻译： 所提出的发明的实施例主要应用于在其发射机中使用THP的通信系统中的BLW进行补偿，特别适用于10GBase-T以太网应用。 本装置包括用于在我们的BLW补偿器之后产生DC偏移信息（误差信号）和额外模数单位的附加判定装置（限幅器），以重新补偿补偿符号以校正16-PAM信号。 此外，我们的方法中的估计误差信号是由BLW补偿器的输入与判决装置的输出之间的差异产生的。 然后对这些误差信号进行加权，以减轻错误的DC偏移信息对BLW补偿器的性能的影响。 因此，可以导出更直接和准确的DC偏移信息，以改善以前的作品中的不准确的BLW估计。