公开(公告)号：US06741644B1

公开(公告)日：2004-05-25

申请号：US09499194

申请日：2000-02-07

申请人： Hossein Dehghan ,  Ting-Yin Chen ,  Dariush Dabiri

发明人： Hossein Dehghan ,  Ting-Yin Chen ,  Dariush Dabiri

IPC分类号： H03H730

CPC分类号： H03H17/0294 ,  H03H21/0001 ,  H04L25/03878

摘要： A communications receiver and method are provided for receiving a transmitted signal from a transmission channel having a low-pass filter characteristic. The receiver includes a receiver input for coupling to the channel and a switched capacitor pre-emphasis filter coupled to the receiver input. An analog-to-digital (A/D) converter is coupled to an output of the pre-emphasis filter. An equalizer is coupled to an output of the analog-to-digital converter.

摘要翻译： 提供了一种用于从具有低通滤波器特性的传输信道接收发射信号的通信接收机和方法。 接收器包括用于耦合到通道的接收器输入端和耦合到接收器输入端的开关电容器预加重滤波器。 模数（A / D）转换器耦合到预加重滤波器的输出端。 均衡器耦合到模数转换器的输出端。

公开(公告)号：US06584151B1

公开(公告)日：2003-06-24

申请号：US09439126

申请日：1999-11-12

申请人： Hossein Dehghan ,  Ting-Yin Chen

发明人： Hossein Dehghan ,  Ting-Yin Chen

IPC分类号： H03H730

CPC分类号： H04L25/03006 ,  H04L2025/03694

摘要： An adaptive equalizer for use in a communication receiver that prevents equalizer operation divergence in response to slicer errors in a high noise communication application. The equalizer uses the difference between an equalized sample value and the nearest constellation point determined by the slicer both as the equalizer adaptation value and as a control value to selectively enable or minimize (disable) adaptation modifications. The difference is compared to a threshold value to determine whether the difference should be applied to the equalizer for adaptation purposes or a minimal value to prevent equalizer divergence in response to significant slicer errors. The threshold value is determined as a function of the ratio of the probability of correct slicer determinations and the probability of incorrect slicer determinations for a given sample value and a given signal to noise ratio. The threshold value may be predetermined as a constant for a particular communication application or may be dynamically computed as communications proceed.

摘要翻译： 一种在通信接收机中使用的自适应均衡器，其防止响应于高噪声通信应用中的限幅器误差的均衡器操作发散。 均衡器使用均衡采样值和由限幅器确定的最近的星座点之间的差作为均衡器适配值，并且作为控制值来选择性地使能或最小化（禁用）适配修改。 将该差异与阈值进行比较以确定该差异是否应当应用于均衡器以用于适应目的，或者是最小值以防止响应于显着的限幅器误差的均衡器发散。 根据给定采样值和给定的信噪比对正确的限幅器确定概率与不正确的限幅器确定的概率的比值确定阈值。 阈值可以预定为特定通信应用的常数，或者可以在通信进行时被动态地计算。

公开(公告)号：US07898364B2

公开(公告)日：2011-03-01

申请号：US12314495

申请日：2008-12-11

申请人： Ting-Yin Chen

发明人： Ting-Yin Chen

IPC分类号： H03H9/46 ,  H03H9/70

CPC分类号： H03H9/2447 ,  H03H9/462 ,  H03H9/465

摘要： A method and apparatus for recovering at least one signal of interest are provided. The method includes receiving an overall signal, the overall signal including the at least one signal of interest and a plurality of other signals, identifying at least one of the strongest components of the plurality of other signals, attenuating, using at least one MEMS resonator, any of the components identified by the identifying, wherein the overall signal will be modified to include the at least one signal of interest, attenuated versions of the components identified by the identifying, and the remaining portions of the plurality of other signals that were not subject to the attenuating, and recovering, after the attenuating, the at least one signal of interest.

摘要翻译： 提供一种用于恢复至少一个感兴趣的信号的方法和装置。 该方法包括：接收整个信号，包括所述至少一个感兴趣信号的整个信号和多个其它信号，识别多个其它信号中最强分量中的至少一个，使用至少一个MEMS谐振器衰减， 通过识别识别的任何组件，其中，整个信号将被修改为包括所述至少一个感兴趣的信号，由识别识别的组件的衰减版本，以及多个其他未被接收的其它信号的剩余部分 以衰减并且在衰减之后恢复至少一个感兴趣的信号。

公开(公告)号：US06665355B1

公开(公告)日：2003-12-16

申请号：US09391973

申请日：1999-09-08

申请人： Ting-Yin Chen ,  Ravi Bhaskaran ,  Christopher Keate ,  Kedar D. Shirali

发明人： Ting-Yin Chen ,  Ravi Bhaskaran ,  Christopher Keate ,  Kedar D. Shirali

IPC分类号： H03D124

CPC分类号： H03D1/24

摘要： An inexpensive synchronous detection module is disclosed for a sideband signal receiver that provides for flexibility in design of the tuner. The detection module is adaptable to detection of upper or lower sideband signals. One embodiment includes an analog-to-digital converter, a Hilbert transform filter, a sideband selection switch, a complex multiplier, a carrier recovery. loop, a matched filter, and a decimator. The analog-to-digital converter oversamples an intermediate frequency (IF) signal from the tuner, and the Hilbert transform filter generates a Hilbert transform of the digital IF signal. An analytic IF signal can be generated from the digital IF signal by multiplying the Hilbert transform of the digital IF signal by j(=sqrt(−1)), and adding the resulting imaginary-valued signal to the digital IF signal. The sideband selection switch can “flip” the analytic IF signal by inverting the imaginary-valued signal. The complex multiplier multiplies the analytic IF signal by a complex-value sinusoid to shift the analytic IF signal to baseband. The resulting analytic baseband signal is match filtered and decimated to form a baseband double sideband signal with one sample per symbol period. The carrier recovery loop operates on the imaginary part of the analytic baseband signal to generate the complex sinusoid that shifts the analytic IF signal to baseband.

摘要翻译： 公开了一种边缘信号接收机的便宜的同步检测模块，其提供了调谐器设计的灵活性。 检测模块适用于检测上或下边带信号。 一个实施例包括模数转换器，希尔伯特变换滤波器，边带选择开关，复数乘法器，载波恢复。 循环，匹配滤波器和抽取器。 模数转换器从调谐器中抽取中频（IF）信号，希尔伯特变换滤波器产生数字IF信号的希尔伯特变换。 通过将数字IF信号的希尔伯特变换乘以j（= sqrt（-1）），并将产生的虚值信号与数字IF信号相加，可以从数字IF信号产生分析IF信号。 边带选择开关可以通过反相虚值信号来“翻转”分析IF信号。 复数乘法器将分析的IF信号乘以复数值正弦波，以将分析的IF信号移位到基带。 所得到的分析基带信号被匹配滤波和抽取以形成基带双边带信号，每个符号周期具有一个样本。 载波恢复循环在分析基带信号的虚部上运行，以产生将分析IF信号转换为基带的复数正弦波。

公开(公告)号：US20090237179A1

公开(公告)日：2009-09-24

申请号：US12314495

申请日：2008-12-11

申请人： Ting-Yin Chen

发明人： Ting-Yin Chen

IPC分类号： H03H9/46

CPC分类号： H03H9/2447 ,  H03H9/462 ,  H03H9/465

摘要： A method and apparatus for recovering at least one signal of interest are provided. The method includes receiving an overall signal, the overall signal including the at least one signal of interest and a plurality of other signals, identifying at least one of the strongest components of the plurality of other signals, attenuating, using at least one MEMS resonator, any of the components identified by the identifying, wherein the overall signal will be modified to include the at least one signal of interest, attenuated versions of the components identified by the identifying, and the remaining portions of the plurality of other signals that were not subject to the attenuating, and recovering, after the attenuating, the at least one signal of interest.

摘要翻译： 提供一种用于恢复至少一个感兴趣的信号的方法和装置。 该方法包括：接收整个信号，包括所述至少一个感兴趣信号的整个信号和多个其它信号，识别多个其它信号中最强分量中的至少一个，使用至少一个MEMS谐振器衰减， 通过识别识别的任何组件，其中，整个信号将被修改为包括所述至少一个感兴趣的信号，由识别识别的组件的衰减版本，以及多个其他未被接收的其它信号的剩余部分 以衰减并且在衰减之后恢复至少一个感兴趣的信号。