公开(公告)号：US08248170B2

公开(公告)日：2012-08-21

申请号：US12952154

申请日：2010-11-22

申请人： Dariush Dabiri ,  Dongwoon Bai ,  Nils Graef ,  Wenwei Pan

发明人： Dariush Dabiri ,  Dongwoon Bai ,  Nils Graef ,  Wenwei Pan

IPC分类号： H03K3/03

CPC分类号： G06F1/022

摘要： A stabilized quadrature oscillator providing consistently high signal quality is disclosed. The stabilized quadrature oscillator includes an iterative quadrature oscillator and a quadrature signal stabilizer. The iterative quadrature oscillator generates an iterative cosine signal and an iterative sine signal using a stabilized cosine signal and a stabilized sine signal from the quadrature signal stabilizer. The quadrature signal stabilizer generates the stabilized cosine signal and the stabilized sine signal based on an energy measure of the iterative cosine signal and the iterative sine signal. Specifically, if the energy measure is less than a low threshold then the quadrature signal stabilizer generates the stabilized sine signal and the stabilized cosine signal to have a greater magnitude than the iterative sine signal and the iterative cosine signal, respectively. Conversely, if the energy measure is greater than a high threshold then the quadrature signal stabilizer generates the stabilized sine signal and the stabilized cosine signal to have a lesser magnitude than the iterative sine signal and the iterative cosine signal, respectively.

摘要翻译： 公开了一种提供一致的高信号质量的稳定的正交振荡器。 稳定的正交振荡器包括迭代正交振荡器和正交信号稳定器。 迭代正交振荡器使用稳定余弦信号和来自正交信号稳定器的稳定正弦信号产生迭代余弦信号和迭代正弦信号。 正交信号稳定器基于迭代余弦信号和迭代正弦信号的能量测量值产生稳定的余弦信号和稳定的正弦信号。 具体地说，如果能量测量小于低阈值，则正交信号稳定器分别产生稳定的正弦信号和稳定的余弦信号，以具有比迭代正弦信号和迭代余弦信号更大的幅度。 相反，如果能量测量值大于高阈值，则正交信号稳定器分别产生稳定正弦信号和稳定余弦信号，其幅度分别小于迭代正弦信号和迭代余弦信号。

公开(公告)号：US20120126903A1

公开(公告)日：2012-05-24

申请号：US12952154

申请日：2010-11-22

申请人： Dariush Dabiri ,  Dongwoon Bai ,  Nils Graef ,  Wenwei Pan

发明人： Dariush Dabiri ,  Dongwoon Bai ,  Nils Graef ,  Wenwei Pan

IPC分类号： H03B27/00

CPC分类号： G06F1/022

摘要： A stabilized quadrature oscillator providing consistently high signal quality is disclosed. The stabilized quadrature oscillator includes an iterative quadrature oscillator and a quadrature signal stabilizer. The iterative quadrature oscillator generates an iterative cosine signal and an iterative sine signal using a stabilized cosine signal and a stabilized sine signal from the quadrature signal stabilizer. The quadrature signal stabilizer generates the stabilized cosine signal and the stabilized sine signal based on an energy measure of the iterative cosine signal and the iterative sine signal. Specifically, if the energy measure is less than a low threshold then the quadrature signal stabilizer generates the stabilized sine signal and the stabilized cosine signal to have a greater magnitude than the iterative sine signal and the iterative cosine signal, respectively. Conversely, if the energy measure is greater than a high threshold then the quadrature signal stabilizer generates the stabilized sine signal and the stabilized cosine signal to have a lesser magnitude than the iterative sine signal and the iterative cosine signal, respectively.

摘要翻译： 公开了一种提供一致的高信号质量的稳定的正交振荡器。 稳定的正交振荡器包括迭代正交振荡器和正交信号稳定器。 迭代正交振荡器使用稳定余弦信号和来自正交信号稳定器的稳定正弦信号产生迭代余弦信号和迭代正弦信号。 正交信号稳定器基于迭代余弦信号和迭代正弦信号的能量测量值产生稳定的余弦信号和稳定的正弦信号。 具体地说，如果能量测量小于低阈值，则正交信号稳定器分别产生稳定的正弦信号和稳定的余弦信号，以具有比迭代正弦信号和迭代余弦信号更大的幅度。 相反，如果能量测量值大于高阈值，则正交信号稳定器分别产生稳定正弦信号和稳定余弦信号，其幅度分别小于迭代正弦信号和迭代余弦信号。

公开(公告)号：US08582633B2

公开(公告)日：2013-11-12

申请号：US12952172

申请日：2010-11-22

申请人： Dariush Dabiri ,  Dongwoon Bai

发明人： Dariush Dabiri ,  Dongwoon Bai

IPC分类号： H04B3/46

CPC分类号： H04B1/1027 ,  H04B17/26 ,  H04B17/345

摘要： One or more processing units confirm existence of narrow band interference in a signal by using an estimate f of the frequency, to check for one or more harmonics. In illustrative embodiments, the estimate f is automatically identified as a second harmonic if a predetermined criterion is satisfied by the signal (in the frequency domain) at either of two frequencies namely (A) frequency f/2 and (B) frequency (M−f)/2 and whichever of these two frequencies is stronger is identified as the fundamental frequency. In several such embodiments, the estimate f is automatically identified as a third harmonic if a predetermined criterion is satisfied by the signal (in the frequency domain) at any of three frequencies namely (C) frequency f/3 and (D) frequency (M−t)/3 and (E) frequency (M+f)/3. If the predetermined criteria are not met at all five frequencies (A)-(E) then f is identified as the fundamental frequency.

摘要翻译： 一个或多个处理单元通过使用频率的估计f来确认信号中的窄带干扰的存在，以检查一个或多个谐波。 在说明性实施例中，如果在两个频率（A）频率f / 2和（B）频率（Mf）中的任一个处的信号（在频域中）满足预定标准，则估计f被自动识别为二次谐波。 / 2，这两个频率中的任一个更强，被确定为基频。 在几个这样的实施例中，如果在三个频率中的任何一个（即，（C）频率f / 3和（D）频率（Mt））处的信号（在频域中）满足预定标准，则估计f被自动识别为三次谐波 ）/ 3和（E）频率（M + f）/ 3。 如果在所有五个频率（A） - （E）不满足预定标准，则f被识别为基频。

公开(公告)号：US20120128049A1

公开(公告)日：2012-05-24

申请号：US12952172

申请日：2010-11-22

申请人： Dariush Dabiri ,  Dongwoon Bai

发明人： Dariush Dabiri ,  Dongwoon Bai

IPC分类号： H04B17/00 ,  H04B1/10

CPC分类号： H04B1/1027 ,  H04B17/26 ,  H04B17/345

摘要： One or more processing units confirm existence of narrow band interference in a signal by using an estimate f of the frequency, to check for one or more harmonics. In illustrative embodiments, the estimate f is automatically identified as a second harmonic if a predetermined criterion is satisfied by the signal (in the frequency domain) at either of two frequencies namely (A) frequency f/2 and (B) frequency (M−f)/2 and whichever of these two frequencies is stronger is identified as the fundamental frequency. In several such embodiments, the estimate f is automatically identified as a third harmonic if a predetermined criterion is satisfied by the signal (in the frequency domain) at any of three frequencies namely (C) frequency f/3 and (D) frequency (M−t)/3 and (E) frequency (M+f)/3. If the predetermined criteria are not met at all five frequencies (A)-(E) then f is identified as the fundamental frequency.

摘要翻译： 一个或多个处理单元通过使用频率的估计f来确认信号中的窄带干扰的存在，以检查一个或多个谐波。 在说明性实施例中，如果在两个频率（A）频率f / 2和（B）频率（M-1）中的任一个下，信号（在频域中）满足预定标准，则估计f被自动识别为二次谐波。 f）/ 2和这两个频率之中较强者被确定为基频。 在几个这样的实施例中，如果在三个频率中的任一个（即，（C）频率f / 3和（D）频率（M））的信号（在频域中）满足预定标准，则估计f被自动识别为三次谐波 -t）/ 3和（E）频率（M + f）/ 3。 如果在所有五个频率（A） - （E）不满足预定标准，则f被识别为基频。

公开(公告)号：US08432983B2

公开(公告)日：2013-04-30

申请号：US12952164

申请日：2010-11-22

申请人： Dariush Dabiri

发明人： Dariush Dabiri

IPC分类号： H04K1/10

CPC分类号： H04B3/46 ,  H04B17/345

摘要： One or more processing units are programmed to select from among M tones in a frequency domain representation of a signal, a set of tones including at least a strongest tone (relative to background noise) and a tone adjacent thereto. From among M complex numbers in the frequency domain representation of the signal, a set of complex numbers are identified and denoted as a vector Z, corresponding to the selected set of tones. Vector Z is then multiplied with each of M columns of a matrix G which is predetermined to identify a sub-resolution maxima in Z. The M products that result from the vector multiplication of Z and G are used to determine and store in memory at least one or both of: (A) a flag indicating presence or absence of narrowband interference in the signal; and (B) an estimate of a frequency of the narrowband interference.

公开(公告)号：US08234550B2

公开(公告)日：2012-07-31

申请号：US12613627

申请日：2009-11-06

申请人： Dariush Dabiri ,  Nitin Barot

发明人： Dariush Dabiri ,  Nitin Barot

IPC分类号： H03M13/00 ,  H03M13/03

CPC分类号： H03M13/1137 ,  H03M13/1111 ,  H03M13/114 ,  H03M13/616

摘要： A decoder includes circuitry for generating bits representing received signals, and beliefs representing an associated reliability of each bit. A bit node computation block receives the bits and associated beliefs, and generates a plurality of bit node messages. A plurality of M serially-connected pipeline stages receive the bit node messages and after M decoding cycles, and generate a plurality of check node messages once per decoding cycle, wherein for each iteration cycle, each of the M serially-connected pipeline stages performs check node computations using all of J component codes, wherein each one of the M serially-connected pipeline stages performs check node computations once per decoding cycle using a single component code that is different that component codes used for all other of the M serially-connected pipeline stages, wherein J is at least as great as M, and wherein each iteration includes M decoding cycles.

摘要翻译： 解码器包括用于产生表示接收信号的比特的电路，以及表示每个比特的相关可靠性的信念。 比特节点计算块接收比特和相关联的信念，并且生成多个比特节点消息。 多个M个串行连接的流水线级接收比特节点消息，并且在M个解码周期之后，并且每解码周期生成多个校验节点消息，其中对于每个迭代周期，每个M个串行连接的流水线级执行检查 使用所有J个分量代码的节点计算，其中M个串行连接的流水线级中的每一个使用不同于用于所有其他M个串行连接的流水线的分量代码来执行每个解码周期一次的校验节点计算 其中J至少与M一样大，并且其中每个迭代包括M个解码周期。

公开(公告)号：US20120131080A1

公开(公告)日：2012-05-24

申请号：US12952193

申请日：2010-11-22

申请人： Maged F. Barsoum ,  Jinwen Xi ,  Dariush Dabiri

发明人： Maged F. Barsoum ,  Jinwen Xi ,  Dariush Dabiri

IPC分类号： G06F17/10

CPC分类号： H03H17/04 ,  H03H2218/06

摘要： Methods and systems for multi-input IIR filters with error feedback are disclosed. By using multiple-inputs to generate multiple outputs during each iteration, a multi-input IIR filter in accordance with the present invention has greatly increased throughput. Furthermore, the addition of a multi-variable error feedback unit in accordance with the present invention in a multiple-input IIR filter can greatly increase the accuracy of the multi-variable IIR Filter.

摘要翻译： 公开了具有误差反馈的多输入IIR滤波器的方法和系统。 通过在每次迭代期间通过使用多输入来产生多个输出，根据本发明的多输入IIR滤波器大大提高了吞吐量。 此外，在多输入IIR滤波器中添加根据本发明的多变量误差反馈单元可以大大提高多变量IIR滤波器的精度。

公开(公告)号：US20070211794A1

公开(公告)日：2007-09-13

申请号：US11373928

申请日：2006-03-13

申请人： Dariush Dabiri ,  Jose Tellado ,  Sandeep Gupta

发明人： Dariush Dabiri ,  Jose Tellado ,  Sandeep Gupta

IPC分类号： H04L5/16 ,  H04B3/20

CPC分类号： H04L5/1423 ,  H04B3/23

摘要： Embodiments of a method and apparatus for reducing non-linear transmit signal components of a receive signal of a transceiver signal are disclosed. The method includes the transceiver simultaneously transmitting a transmit signal, and receiving the receive signal. A non-linear replica signal of non-linear transmission signal components that are created in the transceiver by a transmit signal DAC, and imposed onto the receive signal, is generated. The non-linear replica signal is subtracted from the received signal reducing the non-linear transmission signal components imposed onto the receive signal.

摘要翻译： 公开了一种用于减少收发信机的接收信号的非线性发送信号分量的方法和装置的实施例。 该方法包括收发机同时发送发送信号，并接收接收信号。 产生通过发送信号DAC在收发器中产生且施加到接收信号上的非线性传输信号分量的非线性复制信号。 从接收到的信号中减去非线性复制信号，减少施加在接收信号上的非线性传输信号分量。

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：US08416719B2

公开(公告)日：2013-04-09

申请号：US12077672

申请日：2008-03-20

申请人： Dariush Dabiri

发明人： Dariush Dabiri

IPC分类号： H04B3/20

CPC分类号： H04B3/231

摘要： Embodiments of a method and apparatus for generating an estimated non-linear echo signal are disclosed. One method includes receiving a plurality of data inputs. The plurality of data inputs are partitioned into subsets. A weight vector is computed for each of the subsets. A vector of addresses to memory locations is computed for each of the subsets. Values of interpolants are accessed at the memory locations (interpolation sites) based on the vector of addresses for each of the subsets. The estimated non-linear echo signal based is calculated on the values of the interpolants and the weight vector corresponding to each subset.