公开(公告)号：US07092412B1

公开(公告)日：2006-08-15

申请号：US09859182

申请日：2001-05-14

申请人： Behrooz Rezvani ,  Rouben Toumani ,  Sushil Agrawal

发明人： Behrooz Rezvani ,  Rouben Toumani ,  Sushil Agrawal

IPC分类号： H04J3/04 ,  H04L12/66 ,  G01R31/08

CPC分类号： H04L27/2608 ,  H04M11/062

摘要： A method and apparatus for extending existing fiber and local area networks across digital subscriber lines, at matching data rates is disclosed. A DSL transceiver system is disclosed with one or more gateways coupled to at least one digital signal processor (DSP). The DSP in turn couples to a plurality of analog-front-ends (AFE's). Each AFE is coupled via associated hybrid front ends (HFE's) to corresponding subscriber lines. The transceiver or a controller coupled thereto maintains a table of bandwidth requirements and frame types for a variety of sessions. Individual sessions include bandwidth requirements beyond existing XDSL capabilities. The system determines frametype, e.g. 802 and bandwidth requirements, e.g. 100 Mbps for each session and allocates more than one subscriber line accordingly. For each session the divergent bandwidth availability of each of the subscriber lines to which the DSP may be coupled is determined and all or a portion of that bandwidth is allocated to the selected session. Provisioning continues until the allocated bandwidth on each subscriber line equals the session requirements. Next, a pseudo channel identifier is allocated to each physical channel. This along with a session number which is assigned to each pseudo channel allows packet based demultiplexing of a single session across a plurality of subscriber lines. A sequence for processing of pseudo channels is then assigned to all the pseudo channels within each session. This information is then communicated to the remote end and a corresponding provisioning takes place.

摘要翻译： 公开了一种用于以匹配的数据速率在数字用户线路之间扩展现有光纤和局域网的方法和装置。 公开了DSL收发器系统，其中一个或多个网关耦合到至少一个数字信号处理器（DSP）。 DSP又耦合到多个模拟前端（AFE）。 每个AFE通过相关联的混合前端（HFE）耦合到相应的用户线路。 收发器或与其耦合的控制器维护各种会话的带宽需求表和帧类型。 个别会话包括超出现有XDSL功能的带宽要求。 系统确定frametype，例如 802和带宽要求，例如 每个会话100 Mbps，并相应地分配多个用户线。 对于每个会话，确定可以耦合DSP的每个用户线路的不同带​​宽可用性，并将该带宽的全部或一部分分配给所选择的会话。 配置将持续到每个用户线上的分配带宽等于会话要求。 接下来，将伪信道标识符分配给每个物理信道。 这与分配给每个伪信道的会话号码一起允许跨多个用户线路进行基于分组的单个会话的解复用。 然后将用于处理伪信道的序列分配给每个会话内的所有伪信道。 然后将该信息传送到远程端并进行相应的配置。

公开(公告)号：US07076010B1

公开(公告)日：2006-07-11

申请号：US09876201

申请日：2001-06-06

申请人： Sam Heidari ,  Raminder S. Bajwa ,  Behrooz Rezvani ,  Dale Smith ,  Prem Ramaswamy

发明人： Sam Heidari ,  Raminder S. Bajwa ,  Behrooz Rezvani ,  Dale Smith ,  Prem Ramaswamy

IPC分类号： H03K5/01

CPC分类号： H04B3/142 ,  H04L25/0216 ,  H04L25/03038 ,  H04L25/03133 ,  H04L2025/03414 ,  H04L2025/03585

摘要： The current invention provides a method and apparatus for time domain equalization in an XDSL modem. A received communication channel is analyzed to determine the highest frequency component thereof. Typically, there is an inverse relationship between the length of a subscriber line and the highest frequency component over which communications can be supported. In response to the frequency determination, the sampling rate for the channel is reduced to the lowest sample rate consistent with maintaining signal integrity on the highest frequency component of the channel. The sampling rate reduction may accomplished in the analog portion of the receive path, e.g. the analog-to-digital converter (ADC) or in a digital decimator coupled thereto. Concurrently the demodulator complexity is also scaled back. Where the XDSL protocol is digital multi-tone (DMT) the input sample size to the discrete Fourier transform (DFT) engine is reduced accordingly. With these adjustments in place TEQ resources may be scaled inversely. Thus as line length increases and the available bandwidth on the subscriber line is reduced more TEQ resources are made available to deal with the increased delay interval over which intersymbol interference is evidenced. Scaling of TEQ resources may be accomplished using a TEQ architecture which allows either the length or the tap line or the delay between taps to be varied.

摘要翻译： 本发明提供了一种用于XDSL调制解调器中时域均衡的方法和装置。 分析接收到的通信信道以确定其最高频率分量。 通常，用户线的长度与可以支持通信的最高频率分量之间存在反比关系。 响应于频率确定，信道的采样率降低到与在信道的最高频率分量上保持信号完整性一致的最低采样率。 可以在接收路径的模拟部分中实现采样率降低，例如， 模数转换器（ADC）或与之耦合的数字抽取器。 同时，解调器的复杂度也缩小了。 在XDSL协议是数字多音调（DMT）的情况下，离散傅里叶变换（DFT）引擎的输入采样大小相应减少。 通过这些调整，TEQ资源可能会相对缩小。 因此，当线路长度增加并且用户线路上的可用带宽减少时，更多的TEQ资源可用于处理增加的符号间干扰的延迟间隔。 TEQ资源的缩放可以使用允许长度或抽头线或抽头之间的延迟进行变化的TEQ架构来实现。

公开(公告)号：US20190393599A1

公开(公告)日：2019-12-26

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 ,  H01Q3/26 ,  H01Q21/24 ,  H01Q21/28 ,  H01Q25/00 ,  H04N21/61 ,  H01Q19/19

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：US10411341B2

公开(公告)日：2019-09-10

申请号：US15663613

申请日：2017-07-28

申请人： Behrooz Rezvani

发明人： Behrooz Rezvani

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

摘要： An indoor antenna system comprises one or more antenna modules. Each antenna module comprises an antenna array configured to receive an input signal and generate a plurality of outputs, a selector that selects a subset of the plurality of outputs, and a converter that converts the subset of the plurality of outputs into a set of digital streams. The antenna system further includes a processor that receives and analyzes outputs from the one or more antenna modules and generates an output signal corresponding to the input signal, and a controller that controls states of the one or more antenna modules. Each antenna module is configurable to be in any of a plurality of states to receive the incoming signal. The controller is configured to cause the state of each antenna module to change.

公开(公告)号：US08446998B2

公开(公告)日：2013-05-21

申请号：US12299470

申请日：2007-05-04

申请人： Behrooz Rezvani ,  Farrokh Farrokhi ,  Andrea Goldsmith

发明人： Behrooz Rezvani ,  Farrokh Farrokhi ,  Andrea Goldsmith

IPC分类号： H04B7/10 ,  H04L1/02

CPC分类号： H04L25/03057 ,  H04B7/0848 ,  H04B7/086 ,  H04L2025/03426

摘要： A technique for processing received signals in multiple-antenna systems. Received signals from the different antennas may be amplified by a Low Noise Amplifier (LNA) and time-multiplexed by a switch to form a single analog signal. The time-multiplexed analog signal is down-converted and processed using a single RF chain for each signal component. This may result in an N-fold decrease in hardware in multiple antenna receiver systems.

摘要翻译： 一种在多天线系统中处理接收信号的技术。 来自不同天线的接收信号可以由低噪声放大器（LNA）放大，并由开关进行时分复用以形成单个模拟信号。 时分多路复用的模拟信号用于每个信号分量的单个RF链进行下变频和处理。 这可能导致多个天线接收机系统中的硬件减少N倍。

公开(公告)号：US20110069687A1

公开(公告)日：2011-03-24

申请号：US12840252

申请日：2010-07-20

申请人： Behrooz Rezvani ,  Saied Ansari

发明人： Behrooz Rezvani ,  Saied Ansari

IPC分类号： H04W40/00

CPC分类号： H04L12/6418

摘要： Deployment of wireless broadband and systems for use in providing wireless broadband is described. The system can include a trunk, which can include a root node, optional repeaters, and a main distribution node, the combination which enables wireless MIMO backhaul to a network such as the Internet.

摘要翻译： 描述了用于提供无线宽带的无线宽带和系统的部署。 该系统可以包括中继线，该中继线可以包括根节点，可选中继器和主分配节点，该组合使无线MIMO回传到诸如因特网的网络。

公开(公告)号：US20090225658A1

公开(公告)日：2009-09-10

申请号：US12278753

申请日：2007-11-19

申请人： Behrooz Rezvani ,  Andrea Goldsmith

发明人： Behrooz Rezvani ,  Andrea Goldsmith

IPC分类号： H04L12/26 ,  H04L12/28

CPC分类号： H04W40/06 ,  H04B7/0615 ,  H04B7/0842 ,  H04L45/00 ,  H04L45/06 ,  H04W8/005 ,  H04W40/12 ,  H04W40/16 ,  H04W84/18 ,  Y02D70/142 ,  Y02D70/144 ,  Y02D70/146 ,  Y02D70/22 ,  Y02D70/322 ,  Y02D70/34 ,  Y02D70/444

摘要： An architecture and protocol stack for matrix mesh wireless networks, where one or more nodes (102) and/or clients in the network have more than one antenna (208). One or more frequency bands and support devices with different communication protocols can be utilized. Matrix channel characteristics are used to establish parameters for each matrix channel in the matrix mesh network.

摘要翻译： 用于矩阵网状无线网络的架构和协议栈，其中网络中的一个或多个节点（102）和/或客户端具有多于一个的天线（208）。 可以利用具有不同通信协议的一个或多个频带和支持设备。 矩阵信道特征用于为矩阵网状网络中的每个矩阵信道建立参数。

公开(公告)号：US06963603B1

公开(公告)日：2005-11-08

申请号：US09876263

申请日：2001-06-06

申请人： Behrooz Rezvani ,  Sam Heidari ,  Dale Smith

发明人： Behrooz Rezvani ,  Sam Heidari ,  Dale Smith

IPC分类号： H04B1/38 ,  H04B3/56

CPC分类号： H04B3/56 ,  H04B2203/5408 ,  H04B2203/5425 ,  H04B2203/5491 ,  H04L5/0007 ,  H04L5/0042 ,  H04L5/0044 ,  H04L5/006 ,  H04L5/008 ,  H04L25/03159 ,  H04L25/03343 ,  H04L2025/03414 ,  H04L2025/03522 ,  H04L2025/03802

摘要： An apparatus and method is provided for minimizing frequency distortion in the transmit path of an XDSL modem implementing digital multi-tone (DMT) line code. The current invention provides a means for both determining and correcting for distortion in the frequency domain. The apparatus may be incorporated in an existing X-DSL architecture without additional circuitry. In an embodiment of the invention the apparatus may include a calibration phase which may be implemented using the existing analog-to-digital (ADC) conversion and demodulation capabilities on the receive path of the modem. This calibration phase takes place before the training phase associated with establishing communications with a remote site. During the calibration phase a calibration sequence with known spectral characteristics in the frequency domain is injected digitally at the beginning of the transmit path into each of the tone bins of the inverse Fourier Transform engine (IFFT). The receive path is configured to receive feedback of a resultant analog output signal from the transmit path. A frequency analyzer is used to determine the spectral properties of the feedback from the analog output signal and a normalizer is used to compute a local gain table with gain factors for each tone bin which effect the required normalization.

摘要翻译： 提供了一种用于最小化实现数字多音（DMT）线路码的XDSL调制解调器的发送路径中的频率失真的装置和方法。 本发明提供了一种用于确定和校正频域中的失真的装置。 该装置可以并入现有的X-DSL架构中，而不需要附加的电路。 在本发明的实施例中，该装置可以包括校准阶段，其可以使用在调制解调器的接收路径上的现有模数（ADC）转换和解调能力来实现。 该校准阶段在与远程站点建立通信相关联的训练阶段之前进行。 在校准阶段期间，在频域中具有已知频谱特性的校准序列在发射路径的开始被数字地注入到逆傅里叶变换引擎（IFFT）的每个音调块中。 接收路径被配置为从发送路径接收所得到的模拟输出信号的反馈。 使用频率分析器来确定来自模拟输出信号的反馈的频谱特性，并且使用归一化器来计算具有影响所需归一化的每个音调单元的增益因子的局部增益表。

公开(公告)号：US06304205B1

公开(公告)日：2001-10-16

申请号：US09602639

申请日：2000-06-22

申请人： Behrooz Rezvani ,  Peter Gunadisastra

发明人： Behrooz Rezvani ,  Peter Gunadisastra

IPC分类号： H03M444

CPC分类号： H03M1/1225 ,  H03M1/145 ,  H03M1/168 ,  H03M1/44

摘要： An apparatus and method for A/D conversion is provided. The apparatus provides for multi-path multi-channel (MPMC) pipelined A/D conversion. Unlike prior art designs in which the handling of multiple channels requires a linear increase in the associated circuitry and components, the current design scales for multiple channel A/D conversion with less than linear scalability. The A/D converter comprises a plurality of stages and interfaces between adjacent columns of the stages. The stages each include an input, a first output, and a second output. Each of the stages is responsive to an input signal applied to the input to output at the first output a bit signal corresponding to at least one significant bit of the input signal and to output at the second output a residue signal corresponding to a difference between the input signal and the bit signal. The stages are arranged in columns. The interfaces are located between adjacent columns for passing residue signals from an upstream one of the adjacent columns to the inputs of a downstream one of the adjacent columns. At least one interface includes a multiplexer. The multiplexer switchably couples residue signals from at east two of the plurality of stages within the upstream one of the adjacent columns across one of the plurality of stages within the downstream one of the adjacent columns.

摘要翻译： 提供了用于A / D转换的装置和方法。 该设备提供多路径多通道（MPMC）流水线A / D转换。 不同于现有技术的设计，其中多个通道的处理需要相关联的电路和组件的线性增加，目前的设计可缩放具有小于线性可扩展性的多通道A / D转换。 A / D转换器包括多个级和相邻列之间的接口。 各级包括输入，第一输出和第二输出。 每个级都响应于施加到输入的输入信号，以在第一输出处输出与输入信号的至少一个有效位相对应的位信号，并在第二输出处输出对应于 输入信号和位信号。 这些阶段是按列排列的。 接口位于相邻列之间，用于将残留信号从相邻列中的上游一个传递到相邻列中的下游一个的输入。 至少一个接口包括多路复用器。 所述多路复用器在相邻列中的下游一个之间的多个级中的一个级别上可切换地耦合来自相邻列中的上游侧之一的多个级中的东两端的残留信号。

公开(公告)号：US20180034150A1

公开(公告)日：2018-02-01

申请号：US15663613

申请日：2017-07-28

申请人： Behrooz Rezvani

发明人： Behrooz Rezvani

IPC分类号： H01Q3/08 ,  H04N21/61 ,  H01Q19/19

CPC分类号： H01Q3/08 ,  H01Q3/2605 ,  H01Q19/19 ,  H01Q21/245 ,  H01Q21/28 ,  H01Q25/001 ,  H04N21/6143

摘要： An indoor antenna system comprises one or more antenna modules. Each antenna module including an antenna array configured to receive an input signal and generate a plurality of outputs, a selector that selects a subset of the plurality of outputs, and a converter that converts the subset of the plurality of outputs into a set of digital streams. The antenna system further includes a processor that receives and analyzes outputs from the one or more antenna modules and generate an output signal corresponding to the input signal, and a controller that controls states of the one or more antenna modules. Each antenna module is configurable to be in any of a plurality of states to receive the incoming signal. The controller is configured to cause the state of each antenna module to change extremely fast so that each state lasts for a time corresponding to a few wavelengths, long enough so at least one wavelength is observed at a particular state. The processor is configured to obtain maximum achievable SINR for the output signal from digital streams output from the one or more antenna modules at various states.