公开(公告)号：US06873653B1

公开(公告)日：2005-03-29

申请号：US09779256

申请日：2001-02-07

申请人： Behrooz Rezvani ,  Sam Heidari ,  John Zhongxuan Zhang ,  Dale Smith

发明人： Behrooz Rezvani ,  Sam Heidari ,  John Zhongxuan Zhang ,  Dale Smith

IPC分类号： H04L5/16 ,  H04L27/26

CPC分类号： H04L5/16 ,  H04L27/2601

摘要： An apparatus and method is provided for minimizing in channel distortion in an X-DSL line driver is disclosed. The apparatus may be incorporated in an existing X-DSL architecture without additional circuitry. Out of band monitoring of a channel is implemented to adaptively minimize out of band interference and in band distortion. A unique training sequence, suitable for DMT line codes is set forth. The training sequence allows a full spectral characterization of the downstream signal space with a single upstream monitoring tone. The invention may be used with multi-channel X-DSL line drivers interfacing with any of a number of multi-channel supply architectures. The apparatus may be applied with equal advantage to communication protocols other than X-DSL. The apparatus may be applied with equal advantage in wired and wireless media.

摘要翻译： 提供了一种用于最小化X-DSL线路驱动器中的信道失真的装置和方法。 该装置可以并入现有的X-DSL架构中，而不需要附加的电路。 实现频带的带外监视以自适应地最小化带外干扰和带内失真。 阐述了适用于DMT线路码的唯一训练序列。 训练序列允许使用单个上游监控音调对下游信号空间的全频谱表征。 本发明可以与与多个多信道供应架构中的任何一个接口的多信道X-DSL线路驱动器一起使用。 该装置可以与除了X-DSL之外的通信协议相同的优点。 该装置可以在有线和无线介质中具有相同的优点。

公开(公告)号：US06760434B1

公开(公告)日：2004-07-06

申请号：US09598012

申请日：2000-06-20

申请人： Behrooz Rezvani ,  Fu-Ho Lee

发明人： Behrooz Rezvani ,  Fu-Ho Lee

IPC分类号： H04M908

CPC分类号： H04M19/001 ,  H04L5/0007 ,  H04L5/143 ,  H04L27/0002

摘要： A method and apparatus for coupling an xDSL transceiver with a subscriber line is disclosed. A hybrid circuit is disclosed which exhibits a different relative gain factor for transmitted signals and received signals. The difference in gain factors results in part from a combined balance circuit and transformer which exhibit a different coupling ratio between the primary and secondary coils on the receive path and the transmit path. The hybrid circuit may be used to isolate the receive signal from the transmit signal in the full duplex mode of operation. The gain from the transmit port to the receive port is minimum and most of the energy is transmitted to the subscriber line. In an embodiment of the invention a hybrid circuit for communicating a transmit signal and a receive signal across a subscriber line is disclosed. The hybrid circuit includes: a transformer and a balance circuit. The transformer includes a primary inductor and a secondary inductor and the secondary inductor for coupling to the subscriber line and the primary inductor including at least two inductive portions. The balance circuit includes a transmit interface to input the transmit signal and a receive interface to output the receive signal, and the balance circuit coupling both the transmit interface and the receive interface with the at least two inductive portions of the primary to change the relative magnitude of an induced emf between the primary and the secondary for the transmit signal and the receive signal. In an alternate embodiment of the invention a method for communicating a transmit signal and a receive signal across a subscriber line is disclosed.

摘要翻译： 公开了一种用于将xDSL收发器与用户线路耦合的方法和装置。 公开了一种混合电路，其表现出用于发射信号和接收信号的不同的相对增益因子。 增益因子的差异部分来自组合平衡电路和变压器，其在接收路径和发射路径上表现出主要和次要线圈之间的不同耦合比。 混合电路可以用于在全双工操作模式下将接收信号与发送信号隔离。 从发送端口到接收端口的增益是最小的，并且大部分能量被传送到用户线路。在本发明的实施例中，公开了一种用于在用户线路上传送发射信号和接收信号的混合电路。 混合电路包括：变压器和平衡电路。 变压器包括初级电感器和次级电感器，并且用于耦合到用户线路的次级电感器和包括至少两个感应部分的初级电感器。 平衡电路包括用于输入发射信号的发射接口和用于输出接收信号的接收接口，并且平衡电路将发射接口和接收接口两者耦合到初级的至少两个感应部分以改变相对幅度 的发射信号和接收信号的初级和次级之间的感应电动势。 在本发明的替代实施例中，公开了一种用于在用户线路上传送发射信号和接收信号的方法。

公开(公告)号：US06718019B1

公开(公告)日：2004-04-06

申请号：US09955616

申请日：2001-09-18

申请人： Sam Heidari ,  Behrooz Rezvani ,  Hojat Khelghati ,  Yuwen Su ,  Qasem Aldrubi

发明人： Sam Heidari ,  Behrooz Rezvani ,  Hojat Khelghati ,  Yuwen Su ,  Qasem Aldrubi

IPC分类号： H04M1100

CPC分类号： H04M1/24 ,  H04M3/30

摘要： The current invention provides a method and apparatus for wireline characterization is disclosed. The method may be implemented with any modulation protocol but is particularly suited for multi-carrier modulation protocols such as discrete multi-tone (DMT). The apparatus may be incorporated into physical or logical modems. In an embodiment of the invention an apparatus for wireline characterization in a modem with a transmit path and a receive path each configured to couple with a remote modem via a wireline in which available communication bandwidth is split into a number of independent sub-channels is disclosed. The apparatus comprises: a tone selector, a cumulative loss estimator and a shift register. The tone selector selects a subset of the number of sub-channels within the bandwidth of a received wireline communication for which subset the sum of the square roots of the corresponding sub-channel indices may be expressed as an integer power “n” of 2. The cumulative loss estimator cumulates the insertion losses across the selected subset of the sub-channels and outputs a binary value corresponding thereto. The shift register couples to the cumulative loss estimator to scale a magnitude of the binary value received from the cumulative loss estimator by an amount proportionate to “n” to obtain a scaled electrical distance estimate for the wireline. Corresponding method and means are disclosed.

摘要翻译： 本发明提供一种用于电缆表征的方法和装置。 该方法可以用任何调制协议实现，但是特别适用于诸如离散多音调（DMT）的多载波调制协议。 该装置可以并入到物理或逻辑调制解调器中。 在本发明的一个实施例中，公开了一种用于具有发射路径和接收路径的调制解调器中的有线线路表征的装置，每个发送路径和接收路径被配置为经由有线将远程调制解调器耦合到其中，其中可用通信带宽被分割成多个独立子信道 。 该装置包括：音调选择器，累积损耗估计器和移位寄存器。 音调选择器选择接收的有线通信的带宽内的子信道数量子集，相应子信道索引的平方根的和可以表示为2的整数幂“n”。 累积损耗估计器累积跨所选择的子信道子集的插入损耗，并输出对应于其的二进制值。 移位寄存器耦合到累积损耗估计器，以将从累积损耗估计器接收的二进制值的大小缩放与“n”成比例的量，以获得用于有线的缩放电距离估计。 公开了相应的方法和手段。

公开(公告)号：US06516049B1

公开(公告)日：2003-02-04

申请号：US09876195

申请日：2001-06-06

申请人： Sam Heidari ,  Behrooz Rezvani ,  Hojat Khelghati ,  Yuwen Su ,  Qasem Aldrubi

发明人： Sam Heidari ,  Behrooz Rezvani ,  Hojat Khelghati ,  Yuwen Su ,  Qasem Aldrubi

IPC分类号： H04M124

CPC分类号： H04M1/24 ,  H04M3/30

摘要： The current invention provides a method and apparatus for determining insertion loss in wireline communication systems. The method may be implemented with any modulation protocol but is particularly suited for multi-carrier modulation protocols such as discrete multi-tone (DMT). The method for calculation of the insertion loss uses a received signal and a discrete subset of frequency ranges, e.g. DMT tones, within that signal. For each of the subset of frequency ranges the average received power on each of the selected set of tones is determined. Next the average power on each received subset of tones is converted to log2 using a simple log2 estimation circuit that avoids the complexity associated with log tables and other prior art methods of computing logarithms. Then the sum of the log2 of the average power received in each of the selected subset of tone bins is determined. Next, the known transmitted power for the selected subset of tones is expressed as log2, is summed and is then subtracted from the sum of the log2 of the average power received. Then using a simple electrical length estimation circuit the insertion loss is calculated. A corresponding apparatus is disclosed.

摘要翻译： 本发明提供了一种用于确定有线通信系统中的插入损耗的方法和装置。 该方法可以用任何调制协议实现，但是特别适用于诸如离散多音调（DMT）的多载波调制协议。 用于计算插入损耗的方法使用接收信号和频率范围的离散子集，例如， 该信号内的DMT音调。 对于频率范围的每个子集，确定所选择的一组音调中的每一个的平均接收功率。 接下来，使用简单log2估计电路将每个接收的音调子集的平均功率转换为log2，以避免与日志表和其他现有技术的计算对数方法相关联的复杂度。 然后确定在所选择的每个音调分组子集中接收的平均功率的log2的和。 接下来，用于所选择的音调子集的已知发射功率表示为log2，被求和，然后从所接收的平均功率的log2的和中减去。 然后使用简单的电长度估计电路计算插入损耗。 公开了相应的装置。

公开(公告)号：US4799016A

公开(公告)日：1989-01-17

申请号：US80038

申请日：1987-07-31

申请人： Behrooz Rezvani

发明人： Behrooz Rezvani

IPC分类号： G01R33/48 ,  A61B5/055 ,  A61B10/00 ,  G01R33/34 ,  G01R33/36 ,  G01R33/20

CPC分类号： G01R33/34046 ,  G01R33/3635

摘要： A surface coil for use in NMR imaging and NMR spectroscopy includes two cylindrical cage coils disposed around a common region of interest along a central axis. One coil is tuned to the Larmor frequency of .sup.31 phosphorous and the other coil is tuned to the Larmor frequency of hydrogen.

公开(公告)号：US20200176865A1

公开(公告)日：2020-06-04

申请号：US16785489

申请日：2020-02-07

申请人： Behrooz Rezvani

发明人： Behrooz Rezvani

IPC分类号： H01Q3/08 ,  H04N21/61 ,  H01Q19/19 ,  H01Q3/26 ,  H01Q21/24 ,  H01Q21/28 ,  H01Q25/00

摘要： An antenna system comprises an antenna module, a controller, and a processor. The antenna module is capable of adopting, at any time, any one of a plurality of polarities. The controller is capable of providing a time-varying control signal to the antenna module. At a specified time, the time-varying control signal directs the antenna module to adopt a specified polarity. The processor obtains, from the antenna module, at least one digital stream in response to an incident radio-frequency (RF) signal impinging on the antenna module. At the specified time, the at least one digital stream corresponds to the antenna module having adopted the specified polarity. The processor analyzes the at least one digital stream from the antenna module, and generates an output signal corresponding to the incident RF signal.

公开(公告)号：US10559878B2

公开(公告)日：2020-02-11

申请号：US16563917

申请日：2019-09-08

申请人： Behrooz Rezvani

发明人： Behrooz Rezvani

IPC分类号： H01Q3/08 ,  H01Q19/19 ,  H04N21/61 ,  H01Q3/26 ,  H01Q21/24 ,  H01Q25/00 ,  H01Q21/28

摘要： An antenna module, system, and method for receiving an incoming signal in a confined space are disclosed. The antenna module comprises a plurality of antenna elements and a plurality of combiners, each of the plurality of combiners coupled to a subset of the plurality of antenna elements. The system includes the antenna module, a processor, and a controller. The processor receives and analyzes outputs from the antenna module and generates an output signal corresponding to the incoming signal. The controller controls states of the antenna module, which is capable of being in any of a plurality of states to receive the incoming signal.

公开(公告)号：US10375534B2

公开(公告)日：2019-08-06

申请号：US13334726

申请日：2011-12-22

申请人： Behrooz Rezvani

发明人： Behrooz Rezvani

IPC分类号： H04W4/14 ,  G10L15/14 ,  G10L19/00 ,  G10L13/00 ,  G10L15/24 ,  G10L25/63 ,  H04N7/12 ,  H04N19/60 ,  H04N7/18 ,  H04N5/44 ,  H04N5/38 ,  H04N19/167 ,  G06K9/62 ,  H04W4/18

摘要： Techniques for transmitting and sharing a video sequence over an ultra-low bandwidth channel, such as a short message service (SMS) channel, are disclosed herein. A video is segmented into regions of various interest levels. A set of parameters is developed from a video region of a high interest, wherein the parameters represent a mapping function of a database to model the video region. The set of parameters is transmitted over the ultra-low bandwidth channel to a remote device, wherein the remote device also has access to an instance of the database. The remote device synthesizes the video by using the mapping function of the database, which is represented by the transmitted set of parameters.

公开(公告)号：US08483297B2

公开(公告)日：2013-07-09

申请号：US12599682

申请日：2008-05-12

申请人： Behrooz Rezvani ,  Farrokh Farrokhi

发明人： Behrooz Rezvani ,  Farrokh Farrokhi

IPC分类号： H04K1/10

CPC分类号： H04L27/2628 ,  H04L27/265

摘要： A technique involves using a fast Fourier transform (FFT) module to transform multiple different types of signals. This may be accomplished using one or more of three techniques: logic within the FFT module can enable different processing depending upon a processing state, the FFT module can be called iteratively to transform a signal that is larger than the FFT implemented in the FFT module, the FFT module can be used for parallel transformation of multiple signals that are smaller than the FFT implemented in the FFT module. Thus, a single FFT module can be used to transform a first type of signal (e.g., WIFI) and a second type of signal (e.g., GPS) if configured according to the technique.

摘要翻译： 一种技术涉及使用快速傅立叶变换（FFT）模块来变换多种不同类型的信号。 这可以使用三种技术中的一种或多种实现：FFT模块内的逻辑可以根据处理状态启用不同的处理，可以迭代地调用FFT模块来变换大于FFT模块中实现的FFT的信号， FFT模块可以用于比FFT模块中实现的FFT小的多个信号的并行变换。 因此，如果根据该技术配置，则可以使用单个FFT模块来变换第一类型的信号（例如，WIFI）和第二类型的信号（例如，GPS）。

公开(公告)号：US20130124206A1

公开(公告)日：2013-05-16

申请号：US13464915

申请日：2012-05-04

申请人： Behrooz Rezvani ,  Ali Rouhi

发明人： Behrooz Rezvani ,  Ali Rouhi

IPC分类号： G10L13/08

CPC分类号： G10L13/08 ,  G06T13/40 ,  G10L13/10 ,  H04M1/72552 ,  H04M1/72555

摘要： Techniques for generating a video sequence of a person based on a text sequence, are disclosed herein. Based on the received text sequence, a processing device generates the video sequence of a person to simulate visual and audible emotional expressions of the person, including using an audio model of the person's voice to generate an audio portion of the video sequence. The emotional expressions in the visual portion of the video sequence are simulated based a priori knowledge about the person. For instance, the a priori knowledge can include photos or videos of the person captured in real life.

摘要翻译： 本文公开了用于基于文本序列生成人的视频序列的技术。 基于所接收的文本序列，处理装置生成人的视频序列以模拟人的视觉和听觉情感表达，包括使用该人的语音的音频模型来生成视频序列的音频部分。 视频序列视觉部分的情感表达是基于人的先验知识进行模拟的。 例如，先验知识可以包括在现实生活中捕获的人的照片或视频。