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1. 发明授权

US08537912B2 Extremely high speed broadband access over copper pairs 失效
标题翻译：铜线极速高速宽带接入
公开(公告)号：US08537912B2
公开(公告)日：2013-09-17
申请号：US13034353
申请日：2011-02-24
申请人： Guozhu Long , Amir H. Fazlollahi , Liming Fang , Yuchen Jia
发明人： Guozhu Long , Amir H. Fazlollahi , Liming Fang , Yuchen Jia
IPC分类号： H04K1/10
CPC分类号： H04L25/14 , H04L5/0007 , H04L27/28 , H04M11/062
摘要： Disclosed is an apparatus that includes a plurality of parallel digital signal transmitters that each receive one of a plurality of digital sub-signals wherein each of the plurality of digital signal transmitters is configured to transmit one of the plurality of digital sub-signals that each have about the same bandwidth. The apparatus also includes a combiner coupled to the transmitters and configured to shift some of the plurality of digital sub-signals and to combine the plurality of shifted digital sub-signals into a combined digital signal that has a total bandwidth of that is approximately equal to the sum of the bandwidths of the plurality of digital sub-signals. The total bandwidth comprises a plurality of shifted bandwidths of the plurality of digital sub-signals at about the same offset with respect to each other. The combined digital signal is transmitted over a digital subscriber loop.
摘要翻译：公开了一种装置，其包括多个并行数字信号发射机，每个并行数字信号发射机都接收多个数字子信号中的一个，其中多个数字信号发射机中的每一个被配置为发送每个数字子信号中的每一个大约相同的带宽。该装置还包括组合器，其耦合到发射机并且被配置为移动多个数字子信号中的一些并且将多个移位的数字子信号组合成具有总共带宽的组合数字信号近似等于多个数字子信号的带宽之和。总带宽包括相对于彼此大致相同偏移的多个数字子信号的多个移位带宽。组合的数字信号通过数字用户回路传输。

2. 发明申请

US20120219085A1 Extremely High Speed Broadband Access Over Copper Pairs 失效
标题翻译：超高速宽带接入铜对
公开(公告)号：US20120219085A1
公开(公告)日：2012-08-30
申请号：US13034353
申请日：2011-02-24
申请人： Guozhu Long , Amir H. Fazlollahi , Liming Fang , Yuchen Jia
发明人： Guozhu Long , Amir H. Fazlollahi , Liming Fang , Yuchen Jia
IPC分类号： H04L27/00
CPC分类号： H04L25/14 , H04L5/0007 , H04L27/28 , H04M11/062
摘要： Disclosed is an apparatus that includes a plurality of parallel digital signal transmitters that each receive one of a plurality of digital sub-signals wherein each of the plurality of digital signal transmitters is configured to transmit one of the plurality of digital sub-signals that each have about the same bandwidth. The apparatus also includes a combiner coupled to the transmitters and configured to shift some of the plurality of digital sub-signals and to combine the plurality of shifted digital sub-signals into a combined digital signal that has a total bandwidth of that is approximately equal to the sum of the bandwidths of the plurality of digital sub-signals. The total bandwidth comprises a plurality of shifted bandwidths of the plurality of digital sub-signals at about the same offset with respect to each other. The combined digital signal is transmitted over a digital subscriber loop.
摘要翻译：公开了一种装置，其包括多个并行数字信号发射机，每个并行数字信号发射机都接收多个数字子信号中的一个，其中多个数字信号发射机中的每一个被配置为发送每个数字子信号中的每一个大约相同的带宽。该装置还包括组合器，其耦合到发射机并且被配置为移动多个数字子信号中的一些并且将多个移位的数字子信号组合成具有总共带宽的组合数字信号近似等于多个数字子信号的带宽之和。总带宽包括相对于彼此大致相同偏移的多个数字子信号的多个移位带宽。组合的数字信号通过数字用户回路传输。

3. 发明授权

US07009945B1 Dual-mode analog/digital adaptive echo cancellation in communication systems with asymmetric spectrum 失效
标题翻译：具有不对称频谱的通信系统中的双模式模拟/数字自适应回波消除
公开(公告)号：US07009945B1
公开(公告)日：2006-03-07
申请号：US10836542
申请日：2004-04-30
申请人： Xiangguo Tang , Amir H. Fazlollahi , Guozhu Long
发明人： Xiangguo Tang , Amir H. Fazlollahi , Guozhu Long
IPC分类号： H04B3/20 , H04M9/08
CPC分类号： H04M11/062 , H04B3/235
摘要： An echo cancellation (EC) system for use in a full-duplex communication system having asymmetric signal sampling rates, in particular an ADSL system, is described. The system performs the cancellation of local echo signal in digital or analog domain depending on the loop condition using a switching logic. The EC system further includes an EC unit that generates a digital echo estimate signal at the lower sampling rate of the transmitted signal and then interpolates the digital signal to higher sampling rate to cancel echo signal thereby reducing computation complexity. The digital interpolated echo estimate signal is converted to analog form for use in analog echo cancellation. The subtracted signal resulting from the analog echo cancellation is converted into digital domain and used as feedback for the EC unit to adaptively improve the accuracy of the echo estimate.
摘要翻译：描述了在具有不对称信号采样率的全双工通信系统中使用的回声消除（EC）系统，特别是ADSL系统。根据使用切换逻辑的循环条件，系统在数字或模拟域中执行本地回波信号的取消。 EC系统还包括EC单元，其以所发送信号的较低采样率产生数字回波估计信号，然后将数字信号内插到较高采样率以消除回波信号，从而降低计算复杂度。数字内插回波估计信号被转换为模拟形式用于模拟回声消除。由模拟回波消除产生的相减信号被转换为数字域，并用作EC单元的反馈，以自适应地提高回波估计的准确性。

4. 发明授权

US08238450B2 Dynamic transmitter noise level adjustment for digital subscriber line systems 有权
标题翻译：数字用户线路系统的动态发射机噪声电平调整
公开(公告)号：US08238450B2
公开(公告)日：2012-08-07
申请号：US12689875
申请日：2010-01-19
申请人： Sanjay Gupta , Amir H. Fazlollahi , Guozhu Long , Ying Li , Raphael Jean Cendrillon
发明人： Sanjay Gupta , Amir H. Fazlollahi , Guozhu Long , Ying Li , Raphael Jean Cendrillon
IPC分类号： H04B3/00
CPC分类号： H04M11/062 , H04B3/46
摘要： An apparatus comprising an artificial noise (AN) controller coupled to a digital subscriber line (DSL) transmitter and configured to adjust an AN level for a signal transmitted by the DSL transmitter, wherein the AN level is adjusted based on an actual signal to noise ratio (SNR) of the signal from the receiver to achieve a desired SNR for the signal. Also disclosed is a method comprising maintaining a data rate in a line at about a desired level by adjusting an AN level in a transmitted signal based on a SNR of a received signal.
摘要翻译：一种装置，包括耦合到数字用户线（DSL）发射机的人造噪声（AN）控制器，并且被配置为调整由DSL发射机发送的信号的AN电平，其中AN电平根据实际信噪比（SNR），以实现信号的期望SNR。还公开了一种方法，其包括通过基于接收信号的SNR调整发射信号中的AN电平，将线路中的数据速率维持在大约期望的水平。

5. 发明授权

US08654887B2 Methods and systems for peak-to-average power reduction without reducing data rate 有权
标题翻译：峰值对平均功率降低的方法和系统，而不降低数据速率
公开(公告)号：US08654887B2
公开(公告)日：2014-02-18
申请号：US13363005
申请日：2012-01-31
申请人： Amir H. Fazlollahi , Yuchen Jia
发明人： Amir H. Fazlollahi , Yuchen Jia
IPC分类号： H04L27/00
CPC分类号： H04L27/2614
摘要： A transmitter for performing multicarrier modulation comprising a processing unit configured to generate a multicarrier data signal comprising a plurality of subcarriers, wherein each of the plurality of subcarriers represents at least one data bit of a plurality of data bits, select a subset of the subcarriers based on signal quality information about one or more of the subcarriers, construct a kernel signal comprising the subset of subcarriers, and create a digital signal comprising combining the multicarrier data signal and a peak-to-average ratio (PAR) reduction signal based on the kernel signal, wherein a PAR of the digital signal is less than a PAR of the multicarrier data signal.
摘要翻译：一种用于执行多载波调制的发射机，包括：处理单元，被配置为生成包括多个子载波的多载波数据信号，其中所述多个子载波中的每一个子载波表示多个数据比特的至少一个数据比特，关于关于一个或多个子载波的信号质量信息，构建包括子载波子集的核心信号，并且创建数字信号，包括组合多载波数据信号和基于内核的峰值平均比（PAR）减小信号信号，其中数字信号的PAR小于多载波数据信号的PAR。

6. 发明申请

US20100195745A1 Dynamic Transmitter Noise Level Adjustment for Digital Subscriber Line Systems 有权
标题翻译：数字用户线路系统的动态发射机噪声电平调整
公开(公告)号：US20100195745A1
公开(公告)日：2010-08-05
申请号：US12689875
申请日：2010-01-19
申请人： Sanjay Gupta , Amir H. Fazlollahi , Guozhu Long , Ying Li , Raphael Jean Cendrillon
发明人： Sanjay Gupta , Amir H. Fazlollahi , Guozhu Long , Ying Li , Raphael Jean Cendrillon
IPC分类号： H04L25/08 , H04B15/00 , H04L27/02
CPC分类号： H04M11/062 , H04B3/46
摘要： An apparatus comprising an artificial noise (AN) controller coupled to a digital subscriber line (DSL) transmitter and configured to adjust an AN level for a signal transmitted by the DSL transmitter, wherein the AN level is adjusted based on an actual signal to noise ratio (SNR) of the signal from the receiver to achieve a desired SNR for the signal. Also disclosed is a method comprising maintaining a data rate in a line at about a desired level by adjusting an AN level in a transmitted signal based on a SNR of a received signal.
摘要翻译：一种装置，包括耦合到数字用户线（DSL）发射机的人造噪声（AN）控制器，并且被配置为调整由DSL发射机发送的信号的AN电平，其中AN电平根据实际信噪比（SNR），以实现信号的期望SNR。还公开了一种方法，其包括通过基于接收信号的SNR调整发射信号中的AN电平，将线路中的数据速率维持在大约期望的水平。

7. 发明授权

US07577084B2 ISDN crosstalk cancellation in a DSL system 失效
标题翻译： DSL系统中的ISDN串扰消除
公开(公告)号：US07577084B2
公开(公告)日：2009-08-18
申请号：US10836954
申请日：2004-04-30
申请人： Xiangguo Tang , Guozhu Long , Amir H. Fazlollahi
发明人： Xiangguo Tang , Guozhu Long , Amir H. Fazlollahi
IPC分类号： H04J1/12
CPC分类号： H04B3/21 , H04M3/304 , H04M3/34
摘要： To reduce the ISDN crosstalk in an incoming DSL signal, a crosstalk canceller observes at least a portion of the crosstalk signal and reproduces an estimate of the crosstalk signal for at least a portion of that signal within the DSL band. The crosstalk canceller applies a canceling signal based on the estimated crosstalk signal to reduce the crosstalk in the received DSL signal.
摘要翻译：为了减少输入DSL信号中的ISDN串扰，串扰消除器观察串扰信号的至少一部分，并再现DSL带内该信号的至少一部分的串扰信号的估计。串扰消除器基于估计的串扰信号来应用消除信号，以减少所接收的DSL信号中的串扰。

8. 发明申请

US20130195213A1 Methods and Systems for Peak-to-Average Power Reduction Without Reducing Data Rate 有权
标题翻译：峰值平均功率降低的方法和系统，而不降低数据速率
公开(公告)号：US20130195213A1
公开(公告)日：2013-08-01
申请号：US13363005
申请日：2012-01-31
申请人： Amir H. Fazlollahi , Yuchen Jia
发明人： Amir H. Fazlollahi , Yuchen Jia
IPC分类号： H04B7/02
CPC分类号： H04L27/2614
摘要： A transmitter for performing multicarrier modulation comprising a processing unit configured to generate a multicarrier data signal comprising a plurality of subcarriers, wherein each of the plurality of subcarriers represents at least one data bit of a plurality of data bits, select a subset of the subcarriers based on signal quality information about one or more of the subcarriers, construct a kernel signal comprising the subset of subcarriers, and create a digital signal comprising combining the multicarrier data signal and a peak-to-average ratio (PAR) reduction signal based on the kernel signal, wherein a PAR of the digital signal is less than a PAR of the multicarrier data signal.
摘要翻译：一种用于执行多载波调制的发射机，包括：处理单元，被配置为生成包括多个子载波的多载波数据信号，其中所述多个子载波中的每一个子载波表示多个数据比特的至少一个数据比特，关于关于一个或多个子载波的信号质量信息，构建包括子载波子集的核心信号，并且创建数字信号，包括组合多载波数据信号和基于内核的峰值平均比（PAR）减小信号信号，其中数字信号的PAR小于多载波数据信号的PAR。

9. 发明申请

US20100321115A1 Class-G Line Driver Control Signal 有权
标题翻译： G类线路驱动控制信号
公开(公告)号：US20100321115A1
公开(公告)日：2010-12-23
申请号：US12697913
申请日：2010-02-01
申请人： Hessam Mohajeri , Amir H. Fazlollahi
发明人： Hessam Mohajeri , Amir H. Fazlollahi
IPC分类号： H03F3/04 , H02J1/00 , H03L7/00
CPC分类号： H03F1/025 , H03F3/21 , H03F2200/504 , H03F2200/507 , H03F2200/511 , H03H11/18 , H04L25/0286 , H04L25/03019 , H04L25/03343 , H04L25/03885 , Y10T307/696
摘要： An apparatus comprising an input, a control signal generator coupled to the input and having a control signal generator output, and an amplifier coupled to the control signal generator output, wherein a voltage supplied to the amplifier is switched based on the control signal generator output, and wherein the control signal generator output is based on a data signal in the input. Also included is an apparatus comprising circuitry configured to implement a method comprising detecting an incoming signal, calculating a derivative of the incoming signal, estimating a future incoming signal based on the derivative of the incoming signal and a time step, and providing the estimated future incoming signal to switch between a first supply voltage and a second supply voltage prior to or concurrent with an arrival of the future incoming signal at the switch, wherein the incoming signal and the future incoming signal are analog signals.
摘要翻译：一种装置，包括输入端，耦合到输入端并具有控制信号发生器输出端的控制信号发生器和耦合到控制信号发生器输出端的放大器，其中基于控制信号发生器输出切换提供给放大器的电压，并且其中所述控制信号发生器输出基于所述输入中的数据信号。还包括一种装置，其包括被配置为实现一种方法的电路，该方法包括检测输入信号，计算输入信号的导数，基于输入信号的导数和时间步长来估计未来输入信号，以及提供估计的未来进入信号在开关之前或未来的进入信号的到达之前在第一电源电压和第二电源电压之间切换，其中输入信号和未来的输入信号是模拟信号。

10. 发明授权

US08446219B2 Class-G line driver control signal 有权
标题翻译： Class-G线路驱动控制信号
公开(公告)号：US08446219B2
公开(公告)日：2013-05-21
申请号：US12697913
申请日：2010-02-01
申请人： Hessam Mohajeri , Amir H. Fazlollahi
发明人： Hessam Mohajeri , Amir H. Fazlollahi
IPC分类号： H03F3/20
CPC分类号： H03F1/025 , H03F3/21 , H03F2200/504 , H03F2200/507 , H03F2200/511 , H03H11/18 , H04L25/0286 , H04L25/03019 , H04L25/03343 , H04L25/03885 , Y10T307/696
摘要： An apparatus comprising an input, a control signal generator coupled to the input and having a control signal generator output, and an amplifier coupled to the control signal generator output, wherein a voltage supplied to the amplifier is switched based on the control signal generator output, and wherein the control signal generator output is based on a data signal in the input. Also included is an apparatus comprising circuitry configured to implement a method comprising detecting an incoming signal, calculating a derivative of the incoming signal, estimating a future incoming signal based on the derivative of the incoming signal and a time step, and providing the estimated future incoming signal to switch between a first supply voltage and a second supply voltage prior to or concurrent with an arrival of the future incoming signal at the switch, wherein the incoming signal and the future incoming signal are analog signals.
摘要翻译：一种装置，包括输入端，耦合到输入端并具有控制信号发生器输出端的控制信号发生器和耦合到控制信号发生器输出端的放大器，其中基于控制信号发生器输出切换提供给放大器的电压，并且其中所述控制信号发生器输出基于所述输入中的数据信号。还包括一种装置，其包括被配置为实现一种方法的电路，该方法包括检测输入信号，计算输入信号的导数，基于输入信号的导数和时间步长来估计未来输入信号，以及提供估计的未来进入信号在开关之前或未来的进入信号的到达之前在第一电源电压和第二电源电压之间切换，其中输入信号和未来的输入信号是模拟信号。

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