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1. 发明授权

US07339996B2 Receiver codec super set constellation generator 有权
标题翻译：接收机编解码器超集星座发生器
公开(公告)号：US07339996B2
公开(公告)日：2008-03-04
申请号：US10804914
申请日：2004-03-19
申请人： Sigang Qiu , Vedavalli Gomatam Krishnan , Bo Zhang
发明人： Sigang Qiu , Vedavalli Gomatam Krishnan , Bo Zhang
IPC分类号： H04B14/04 , H04L5/16
CPC分类号： H04L5/1453 , H04L25/4927
摘要： A technique is proposed to accurately estimate the Network CODEC levels for each PCM code a server modem generates. These levels are affected by the digital impairments such as Digital attenuation PAD in the trunk, the Robbed Bit Signaling, the type of CODEC (μ-law or a-law—or non standard), and by analog impairments such as loop distortion, noise, inter-modulation distortion, echo. At client modem equalizer output good estimates for these levels are derived. By detecting RBS pattern of the trunk, and using averages of decode levels of similar RBS slots, more accurate data points are obtained. By further replacing these levels with the closest CODEC receive levels, good accuracy is obtained. Non-monotonic points are detected and eliminated. An upper limit is set for constellation points to avoid saturation of the receiver. IMD correction is applied to the decode levels. Ideal points that are not signaled, are added if possible. When PAD-detection or Codec detection fails, PAD is set to 0 dB and the constellation is based on originally received and averaged data points. Techniques are presented for V.90 type modem constellation generation.
摘要翻译：提出了一种技术来准确地估计服务器调制解调器生成的每个PCM码的网络CODEC电平。这些电平受到数字损伤的影响，例如中继线中的数字衰减PAD，Robbed位信令，CODEC的类型（mu律或a律或非法），以及模拟损伤，如环路失真，噪声，互调失真，回波。在客户端调制解调器均衡器输出这些级别的良好估计值得出。通过检测中继线的RBS模式，并使用类似RBS时隙的解码电平的平均值，可获得更准确的数据点。通过以最接近的CODEC接收电平进一步取代这些电平，获得良好的精度。检测和消除非单调点。设置星座点的上限以避免接收器饱和。解码级别应用IMD校正。没有发出信号的理想点，如果可能的话添加。当PAD检测或编解码检测失败时，PAD设置为0 dB，星座基于原始接收和平均数据点。提出了V.90型调制解调器星座生成技术。

2. 发明授权

US06721363B1 Receiver CODEC super set constellation generator 失效
标题翻译：接收机CODEC超集星座发生器
公开(公告)号：US06721363B1
公开(公告)日：2004-04-13
申请号：US09579529
申请日：2000-05-26
申请人： Sigang Qiu , Vedavalli Gomatam Krishnan , Bo Zhang
发明人： Sigang Qiu , Vedavalli Gomatam Krishnan , Bo Zhang
IPC分类号： H04B1404
CPC分类号： H04L5/1453 , H04L25/4927
摘要： A technique is proposed to accurately estimate the Network CODEC levels for each PCM code a server modem generates. These levels are affected by the digital impairments such as Digital attenuation PAD in the trunk, the Robbed Bit Signaling, the type of CODEC (&mgr;-law or a-law—or non standard), and by analog impairments such as loop distortion, noise, inter-modulation distortion, echo. At client modem equalizer output good estimates for these levels are derived. By detecting RBS pattern of the trunk, and using averages of decode levels of similar RBS slots, more accurate data points are obtained. By further replacing these levels with the closest CODEC receive levels, good accuracy is obtained. Non-monotonic points are detected and eliminated. An upper limit is set for constellation points to avoid saturation of the receiver. IMD correction is applied to the decode levels Ideal points that are not signaled, are added if possible . When PAD-detection or Codec detection fails, PAD is set to 0 dB and the constellation is based on originally received and averaged data points. Techniques are presented for V.90 type modem constellation generation.
摘要翻译：提出了一种技术来准确地估计服务器调制解调器生成的每个PCM码的网络CODEC电平。这些电平受到数字损伤的影响，例如中继线中的数字衰减PAD，Robbed位信令，CODEC的类型（mu律或a律或非法），以及模拟损伤，如环路失真，噪声，互调失真，回波。在客户端调制解调器均衡器输出这些级别的良好估计值得出。通过检测中继线的RBS模式，并使用类似RBS时隙的解码电平的平均值，可获得更准确的数据点。通过以最接近的CODEC接收电平进一步取代这些电平，获得良好的精度。检测和消除非单调点。设置星座点的上限以避免接收器饱和。 IMD校正应用于解码级别如果可能，将添加未发出信号的理想点。当PAD检测或编解码检测失败时，PAD设置为0 dB，星座基于原始接收和平均数据点。提出了V.90型调制解调器星座生成技术。

3. 发明授权

US06721357B1 Constellation generation and re-evaluation 失效
标题翻译：星座生成和重新评估
公开(公告)号：US06721357B1
公开(公告)日：2004-04-13
申请号：US09572860
申请日：2000-05-18
申请人： Bo Zhang , Sigang Qiu , Vedavalli Gomatam Krishnan , Xuefeng Jiang
发明人： Bo Zhang , Sigang Qiu , Vedavalli Gomatam Krishnan , Xuefeng Jiang
IPC分类号： H04L516
CPC分类号： H04L25/4927
摘要： A method of generating a data constellation at a client modem is provided whereby an optimum distance between data constellation data points may be calculated for a predetermined, acceptable error probability. An iterative process may be carried out using proposed data constellations which may be used to provide factors for calculating corrected constellations. Once a constellation is generated to satisfy the required probability of error, the constellation may be re-evaluated using CRC errors and detected noise variance at the client modem. Based upon predetermined levels of noise variance and CRC error, the constellation may be regenerated to operate at either a higher bit rate or a lower bit rate.
摘要翻译：提供了一种在客户端调制解调器处生成数据星座的方法，由此可以针对预定的可接受的错误概率来计算数据星座数据点之间的最佳距离。可以使用可用于提供用于计算校正星座的因子的提出的数据星座来执行迭代过程。一旦产生星座以满足所需的误差概率，则可以使用客户端调制解调器处的CRC错误和检测到的噪声方差来重新评估星座图。基于预定水平的噪声方差和CRC误差，可以重新生成星座以在较高比特率或较低比特率下工作。

4. 发明申请

US20080022162A1 Signal-to-noise ratio (SNR) determination in the time domain 有权
标题翻译：时域中的信噪比（SNR）确定
公开(公告)号：US20080022162A1
公开(公告)日：2008-01-24
申请号：US11480103
申请日：2006-06-30
申请人： Sigang Qiu
发明人： Sigang Qiu
IPC分类号： G06F11/00
CPC分类号： H04B17/336
摘要： A technique for modifying communication operational parameters using fast, low complexity, accurately calculated SNR values. Techniques may improve upon prior art by calculating SNR values in a more time efficient and accurate manner in time domain. An agent may be implemented to calculate SNR values and either store or use the SNR values to modify operational parameters in communicative system.
摘要翻译：一种使用快速，低复杂度，精确计算的SNR值来修改通信操作参数的技术。技术可以通过在时域中以更有效和准确的方式计算SNR值来改进现有技术。可以实施代理来计算SNR值，并且存储或使用SNR值来修改通信系统中的操作参数。

5. 发明授权

US07729663B2 Signal-to-noise ratio (SNR) determination in the frequency domain 失效
标题翻译：频域中的信噪比（SNR）确定
公开(公告)号：US07729663B2
公开(公告)日：2010-06-01
申请号：US11479178
申请日：2006-06-30
申请人： Sigang Qiu , Chih-Kang Chen , Kerry Cai
发明人： Sigang Qiu , Chih-Kang Chen , Kerry Cai
IPC分类号： H04B17/00
CPC分类号： H04B1/1027 , H04B17/336 , H04B17/382
摘要： A technique for modifying communication operational parameters using fast, low complexity, accurately calculated SNR values. Techniques may improve upon prior art by calculating SNR values in a more color noise insensitive manner in the frequency domain. An agent may be implemented to calculate SNR values and either store or use the SNR values to modify operational parameters in communicative system.
摘要翻译：一种使用快速，低复杂度，精确计算的SNR值来修改通信操作参数的技术。技术可以通过在频域中以更多的颜色噪声不敏感的方式计算SNR值来改进现有技术。可以实施代理来计算SNR值，并且存储或使用SNR值来修改通信系统中的操作参数。

6. 发明授权

US07406157B2 Methods and apparatuses for determining loop characteristics using an extended voice-band modem 失效
标题翻译：使用扩展语音频带调制解调器确定回路特性的方法和装置
公开(公告)号：US07406157B2
公开(公告)日：2008-07-29
申请号：US10655094
申请日：2003-09-03
申请人： Sigang Qiu , Prashant Pratap Tawade , Vedavalli G. Krishnan , Wesley H. Smith , Mandayam Krishnan
发明人： Sigang Qiu , Prashant Pratap Tawade , Vedavalli G. Krishnan , Wesley H. Smith , Mandayam Krishnan
IPC分类号： H04M1/24 , H04M3/08 , H04M3/22 , H04K9/00
CPC分类号： H04M3/306
摘要： Embodiments of the invention provide methods for determining the characteristics of a local loop using the multi-carrier tones of a DSL activation process. For one embodiment, one or more sets of downstream multi-carrier tones of a digital subscriber line activation process are received at an extended voice-band modem and are capable of transmitting upstream multi-carrier tones of the digital subscriber line activation process over a local loop. The downstream carrier tones and the upstream carrier tones are folded into a first multi-tone signal and a second multi-tone signal, respectively, each having a plurality of component signals within the spectrum band of the extended voice-based modem. The total signal power of the first multi-tone signal is divided by the power of one of the plurality of component signals of the second multi-tone signal to determine a ratio value. The ratio value is used to determine a characteristic of the local loop.
摘要翻译：本发明的实施例提供了使用DSL激活过程的多载波音调来确定本地环路的特性的方法。对于一个实施例，数字用户线激活过程的一组或多组下行多载波音调在扩展语音频带调制解调器处被接收，并且能够通过本地的数字用户线路激活过程的上行多载波音调发送循环。下游载波音调和上行载波音调分别被折叠成分别具有在扩展的基于语音的调制解调器的频谱范围内的多个分量信号的第一多音调信号和第二多音调信号。将第一多音调信号的总信号功率除以第二多音调信号的多个分量信号之一的功率，以确定比值。比值用于确定本地环路的特性。

7. 发明申请

US20050135568A1 Efficient and reduced-complexity training algorithms 审中-公开
标题翻译：高效和复杂度较低的训练算法
公开(公告)号：US20050135568A1
公开(公告)日：2005-06-23
申请号：US10745901
申请日：2003-12-23
申请人： Sigang Qiu
发明人： Sigang Qiu
IPC分类号： H04M1/24 , H04M11/06
CPC分类号： H04M11/062
摘要： In one embodiment, a method is provided. The method of this embodiment provides receiving a communication having a data sample set, generating a selective data sample set based, at least in part, on the data sample set, and using the selective data sample set to update a training algorithm using an updating algorithm.
摘要翻译：在一个实施例中，提供了一种方法。该实施例的方法提供了接收具有数据样本集的通信，至少部分地基于数据样本集合生成选择性数据样本集，并且使用选择性数据样本集来使用更新算法来更新训练算法。

8. 发明申请

US20050047443A1 Methods and apparatuses for determining loop characteristics using an extended voice-band modem 失效
标题翻译：使用扩展语音频带调制解调器确定回路特性的方法和装置
公开(公告)号：US20050047443A1
公开(公告)日：2005-03-03
申请号：US10655094
申请日：2003-09-03
申请人： Sigang Qiu , Prashant Tawade , Vedavalli Krishnan , Wesley Smith , Mandayam Krishnan
发明人： Sigang Qiu , Prashant Tawade , Vedavalli Krishnan , Wesley Smith , Mandayam Krishnan
IPC分类号： H04J1/00
CPC分类号： H04M3/306
摘要： Embodiments of the invention provide methods for determining the characteristics of a local loop using the multi-carrier tones of a DSL activation process. For one embodiment, one or more sets of downstream multi-carrier tones of a digital subscriber line activation process are received at an extended voice-band modem and are capable of transmitting upstream multi-carrier tones of the digital subscriber line activation process over a local loop. The downstream carrier tones and the upstream carrier tones are folded into a first multi-tone signal and a second multi-tone signal, respectively, each having a plurality of component signals within the spectrum band of the extended voice-based modem. The total signal power of the first multi-tone signal is divided by the power of one of the plurality of component signals of the second multi-tone signal to determine a ratio value. The ratio value is used to determine a characteristic of the local loop.
摘要翻译：本发明的实施例提供了使用DSL激活过程的多载波音调来确定本地环路的特性的方法。对于一个实施例，数字用户线路激活过程的一组或多组下行多载波音调在扩展语音频带调制解调器处被接收，并且能够通过本地发送数字用户线路激活过程的上行多载波音调循环。下游载波音调和上行载波音调分别被折叠成分别具有在扩展的基于语音的调制解调器的频谱范围内的多个分量信号的第一多音调信号和第二多音调信号。将第一多音调信号的总信号功率除以第二多音调信号的多个分量信号之一的功率，以确定比值。比值用于确定本地环路的特性。

9. 发明申请

US20080022161A1 Signal-to-noise ratio (SNR) determination in the frequency domain 失效
标题翻译：频域中的信噪比（SNR）确定
公开(公告)号：US20080022161A1
公开(公告)日：2008-01-24
申请号：US11479178
申请日：2006-06-30
申请人： Sigang Qiu , Chih-Kang Chen , Kerry Cai
发明人： Sigang Qiu , Chih-Kang Chen , Kerry Cai
IPC分类号： G06F11/00
CPC分类号： H04B1/1027 , H04B17/336 , H04B17/382
摘要： A technique for modifying communication operational parameters using fast, low complexity, accurately calculated SNR values. Techniques may improve upon prior art by calculating SNR values in a more color noise insensitive manner in the frequency domain. An agent may be implemented to calculate SNR values and either store or use the SNR values to modify operational parameters in communicative system.
摘要翻译：一种使用快速，低复杂度，精确计算的SNR值来修改通信操作参数的技术。技术可以通过在频域中以更多的颜色噪声不敏感的方式计算SNR值来改进现有技术。可以实施代理来计算SNR值，并且存储或使用SNR值来修改通信系统中的操作参数。

10. 发明授权

US07136439B2 Adaptive synchronization 失效
标题翻译：自适应同步
公开(公告)号：US07136439B2
公开(公告)日：2006-11-14
申请号：US10326729
申请日：2002-12-20
申请人： Sigang Qiu
发明人： Sigang Qiu
IPC分类号： H04L7/00
CPC分类号： G06F3/05 , G06F1/10 , H04J3/0638 , H04J3/0658 , H04L27/2662 , H04L27/2676 , H04M11/062
摘要： A method, apparatus, and system for adaptively synchronizing a sampling clock.
摘要翻译：一种用于使采样时钟自适应同步的方法，装置和系统。

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