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    • 11. 发明申请
    • Method and apparatus for domain transformation multiple signal processing
    • 用于域变换多信号处理的方法和装置
    • US20070165734A1
    • 2007-07-19
    • US11702348
    • 2007-02-05
    • Jose TelladoSanjay KasturiaEran Cohen
    • Jose TelladoSanjay KasturiaEran Cohen
    • H04K1/10
    • H04B3/32H04L25/03006
    • A method and apparatus of joint processing a plurality of digital signal streams is disclosed. The method includes transforming a plurality of the digital signal streams from an original domain to a lower complexity processing domain. The transformed plurality of digital signal streams are joint processed, wherein the joint processing includes multiplying samples of the plurality of transformed digital signal streams by a processing matrix. The joint processed signal streams are inverse transformed back to the original domain. Diagonal elements of the processing matrix are adaptively selected to cancel transmission echo signals of the plurality digital signal streams introduced during transmission of the plurality digital signal streams depending upon signal coupling of the plurality of digital signal streams.
    • 公开了一种联合处理多个数字信号流的方法和装置。 该方法包括将多个数字信号流从原始域转换为较低复杂度的处理域。 经变换的多个数字信号流被联合处理,其中联合处理包括通过处理矩阵将多个经变换的数字信号流的采样相乘。 联合处理的信号流被反向变换回原始域。 根据多个数字信号流的信号耦合,自适应地选择处理矩阵的对角元件以消除在多个数字信号流的传输期间引入的多个数字信号流的传输回波信号。
    • 12. 发明申请
    • Full duplex transceiver
    • 全双工收发器
    • US20050094583A1
    • 2005-05-05
    • US10699761
    • 2003-11-03
    • Sandeep GuptaSanjay KasturiaJose Tellado
    • Sandeep GuptaSanjay KasturiaJose Tellado
    • H04L5/14H04L25/14H04J1/12H04B3/20
    • H04L25/14H04L5/1423
    • The invention includes a full duplex transceiver for transmitting and receiving communication signals. The transceiver includes 1 to N sample and hold circuits. Each sample and hold circuit receives a first signal that includes a far-end signal, and in some cases an echo signal, and in some cases alternatively or additionally cross-talk signals. The transceiver additionally includes a plurality of subtraction circuits. Each subtraction circuit receives an output of at least one of the sample and hold circuits. Each subtraction circuit subtracts at least a fraction of a replica signal from at least a fraction of the output of the at least one of the sample and hold circuits. The subtraction circuits generate an output that represent the far-end signal with substantially reduced echo and/or cross-talk interference, and is available for additional receiver processing.
    • 本发明包括用于发送和接收通信信号的全双工收发器。 收发器包括1到N个采样和保持电路。 每个采样和保持电路接收包括远端信号的第一信号,并且在某些情况下接收回波信号,并且在一些情况下接收或附加的串扰信号。 收发器还包括多个减法电路。 每个减法电路接收至少一个采样和保持电路的输出。 每个减法电路从至少一个采样和保持电路的输出的至少一部分中减去副本信号的至少一部分。 减法电路产生表示具有显着减少的回声和/或串扰干扰的远端信号的输出,并且可用于额外的接收机处理。
    • 15. 发明授权
    • Selection of filter coefficients for tranceiver non-linearity signal cancellation
    • 滤波器系数的选择用于收发器非线性信号消除
    • US07957456B2
    • 2011-06-07
    • US11725528
    • 2007-03-19
    • Dariush DabiriJose Tellado
    • Dariush DabiriJose Tellado
    • H04B1/38H03H7/40
    • H04B1/525H03H17/0261H04L25/03038
    • Embodiments of a method and apparatus for selecting coefficients of a non-linear filter are disclosed. The non-linear filter receives a transmit signal and generates a non-linear replica signal of a transmit DAC of a transceiver. The method include applying a plurality of periodic test pattern signals to inputs of the transmit DAC, wherein the periodic test pattern signals include a stream of symbols. Receive symbols are collected at an output of a receiver ADC of the transceiver resulting from the plurality of periodic test pattern signals. A non-linear map is generated that provides a value for each of n consecutive symbols input to the transmit DAC. Coefficients of the non-linear filter are selected based on the non-linear map.
    • 公开了一种用于选择非线性滤波器系数的方法和装置的实施例。 非线性滤波器接收发射信号并产生收发器的发射DAC的非线性复制信号。 该方法包括将多个周期性测试模式信号应用于发射DAC的输入,其中周期性测试模式信号包括符号流。 在多个周期性测试图形信号产生的收发器的接收器ADC的输出端收集接收符号。 生成非线性映射,为输入到发送DAC的n个连续符号中的每一个提供一个值。 基于非线性映射来选择非线性滤波器的系数。
    • 16. 发明授权
    • Method and system for evaluating a wireless link
    • 用于评估无线链路的方法和系统
    • US07649868B2
    • 2010-01-19
    • US11027031
    • 2004-12-30
    • Robert W. HeathJose Tellado
    • Robert W. HeathJose Tellado
    • H04W4/00
    • H04L1/0025
    • A wireless link between a first transmitter and a first receiver in a multiple access communications system is evaluated by receiving, at the first transmitter, information that is intended for a second receiver and that is transmitted in a second transmission mode that is different from the current transmission mode and obtaining an error measure for the information that is received at the first receiver and intended for the second receiver. The obtained error measure is then used to determine if the second transmission mode is an acceptable transmission mode. In an embodiment, if the second transmission mode is determined to be acceptable, then the current transmission mode of the first receiver can be replaced by the second transmission mode. In an embodiment, the current transmission mode is replaced by the second transmission mode only if the second transmission mode is a “higher” transmission mode than the current transmission.
    • 在多址通信系统中的第一发射机和第一接收机之间的无线链路通过在第一发射机处接收预期用于第二接收机并且以与当前的不同的第二传输模式发送的信息来评估 并且获得在第一接收机处接收并用于第二接收机的信息的误差测量。 然后使用所获得的误差测量来确定第二传输模式是否是可接受的传输模式。 在一个实施例中,如果确定第二传输模式是可接受的,则第一接收机的当前传输模式可以由第二传输模式代替。 在一个实施例中,仅当第二传输模式是比当前传输的“较高”传输模式时,才将当前传输模式替换为第二传输模式。
    • 17. 发明申请
    • Receiver ADC clock delay based on echo signals
    • 基于回波信号的接收器ADC时钟延迟
    • US20070042721A1
    • 2007-02-22
    • US11205615
    • 2005-08-17
    • Sandeep GuptaJose Tellado
    • Sandeep GuptaJose Tellado
    • H04B1/38
    • H04B3/23
    • A device and method for a full-duplex transceiver is disclosed. The transceiver includes a transmitter DAC coupled to a transmission channel. The transmit DAC converting a digital transmission signal into an analog transmission signal. The transceiver further includes a receiver connected to the transmission channel. The receiver receives a desired signal and an echo signal, in which the echo signal includes at least a portion of the analog transmission signal. The receiver includes a receiver ADC, a programmable delay line for adjustably delaying a clock signal of the ADC, and a receiver processing circuit for adjusting the delay of the clock signal based at least in part upon the echo signal.
    • 公开了一种用于全双工收发器的装置和方法。 收发器包括耦合到传输信道的发射机DAC。 发送DAC将数字传输信号转换为模拟传输信号。 收发机还包括连接到传输信道的接收机。 接收器接收期望的信号和回波信号,其中回波信号包括模拟传输信号的至少一部分。 接收器包括接收器ADC,用于可调延迟ADC的时钟信号的可编程延迟线,以及用于至少部分地基于回波信号调整时钟信号的延迟的接收机处理电路。
    • 19. 发明授权
    • Peak to average power ratio reduction
    • 峰均功率比降低
    • US06512797B1
    • 2003-01-28
    • US09081493
    • 1998-05-19
    • Jose TelladoJohn M. Cioffi
    • Jose TelladoJohn M. Cioffi
    • H04L512
    • H04L27/2602H04L27/2614H04L27/2626H04L27/2647
    • The present inventions provide methods and systems for reducing the peak to average power ratio of a multi-carrier signal. Reducing the peak to average power ratio of a signal ensures that amplifiers and transmitters are not saturated, causing loss of data. Further, reducing peak to average power ratios reduces the consumption of power during transmission. Peak to average power ratios are reduced by applying a peak reduction signal component to one or more of the plurality of information signals that make up the multi-carrier signal. In one embodiment the peak reduction signal is a basis function of the communication system. The information signal is mapped to duplicate constellation points, which may be easily decoded by a receiver by performing a modulo operation. Negation of the peaks may be performed iteratively to remove any peaks produced during prior peak reduction operations.
    • 本发明提供了用于降低多载波信号的峰均功率比的方法和系统。 降低信号的峰值与平均功率比确保放大器和发射器不饱和,造成数据丢失。 此外,降低峰值与平均功率比降低了传输期间的功率消耗。 通过将峰值降低信号分量应用于构成多载波信号的多个信息信号中的一个或多个来降低峰值与平均功率比。 在一个实施例中,峰值降低信号是通信系统的基础功能。 信息信号被映射到重复的星座点,其可以由接收机容易地通过执行模运算来解码。 可以迭代地执行峰的否定以去除在先前的峰值降低操作期间产生的任何峰。
    • 20. 发明授权
    • Method and apparatus for fast link recovery
    • 快速链路恢复的方法和装置
    • US08804793B2
    • 2014-08-12
    • US12857080
    • 2010-08-16
    • Jiangfeng WuJose TelladoJohn DringNima Ferdosi
    • Jiangfeng WuJose TelladoJohn DringNima Ferdosi
    • H04B1/38
    • H04L25/03343H04L1/0014H04L1/0025H04L1/004H04L2025/03802
    • Embodiments of methods and apparatus for fast link recover are disclosed. One method includes sensing a link quality failure of a link between a receiver and a transmitter. If a link quality failure is sensed, then the receiver selects new pre-coder settings for the transmitter. The receiver communicates the new pre-coder settings to the transmitter. The transmitter applies the new pre-coder settings. The receiver computes its equalizer settings based on the new pre-coder settings of the transmitter. One apparatus or transceiver includes a means for determining a link quality failure of a link between the transceiver and a link partner transceiver. The transceiver selects new pre-coder settings for the link partner transceiver if a link quality failure is sensed. Additionally, the transceiver communicates the new pre-coder settings to the link partner transceiver, and computes its equalizer settings based on the new pre-coder settings of the link partner transceiver.
    • 公开了用于快速链路恢复的方法和装置的实施例。 一种方法包括感测接收机和发射机之间的链路的链路质量故障。 如果感测到链路质量故障,则接收机为发射机选择新的预编码器设置。 接收机将新的预编码器设置传送给发射机。 发射机应用新的预编码器设置。 接收机根据发射机的新的预编码器设置计算其均衡器设置。 一种装置或收发器包括用于确定收发器和链路伙伴收发器之间的链路的链路质量故障的装置。 如果感测到链路质量故障,收发器将为链路伙伴收发器选择新的预编码器设置。 此外,收发器将新的预编码器设置传送到链路伙伴收发器,并且基于链路伙伴收发器的新的预编码器设置来计算其均衡器设置。