公开(公告)号：US20090049347A1

公开(公告)日：2009-02-19

申请号：US12228972

申请日：2008-08-18

申请人： Avadhani Shridhar ,  Sam Heidari

发明人： Avadhani Shridhar ,  Sam Heidari

IPC分类号： G06F11/00

CPC分类号： H04L5/1446 ,  H04L1/0003 ,  H04L1/0059 ,  H04L1/203 ,  H04L1/206 ,  H04L5/1469 ,  H04L27/2647 ,  H04L27/2689

摘要： A transceiver with a plurality of components coupled to one another to form a transmit path and a receive path for multi-tone modulation of user data across a communication medium. The transceiver includes a framer and a deframer. The framer is configured to momentarily suspend framing of user data before processing bits associated with tones targeted for reference data transport and injects the pre-agreed reference pattern therein, after which framing of user data resumes. The deframer is configured to momentarily suspend deframing of received user data bits before processing bits associated with tones targeted for transport of pre-agreed reference data and extracts the received reference bits thereof for comparison with the corresponding pre-agreed reference bits to determine errors therein, after which deframing of user data resumes.

摘要翻译： 具有多个组件的收发器，彼此耦合以形成用于通过通信介质的用户数据的多音调制的发送路径和接收路径。 收发器包括一个成帧器和一个deframer。 成帧器被配置为在处理与针对参考数据传输的音调相关联的位之前暂时停止用户数据的成帧，并在其中注入预先约定的参考模式，之后恢复用户数据的构图。 解帧器被配置为在处理与预先约定的参考数据的传输的目标的音调相关联的位之前暂时停止所接收的用户数据位的解帧，并提取其接收到的参考比特以与对应的预先约定的参考比特进行比较以确定其中的错误， 之后恢复用户数据的清除。

公开(公告)号：US06959036B1

公开(公告)日：2005-10-25

申请号：US09776067

申请日：2001-02-02

申请人： Behrooz Rezvani ,  Dale Smith ,  Sam Heidari ,  Homayoun Shahri

发明人： Behrooz Rezvani ,  Dale Smith ,  Sam Heidari ,  Homayoun Shahri

IPC分类号： H04B1/38 ,  H04L12/56 ,  H04L25/49 ,  H04L27/00 ,  H04L27/26

CPC分类号： H04L27/0012 ,  H04L25/4921 ,  H04L27/2601 ,  H04L2012/5652

摘要： An X-DSL modem supporting multiple X-DSL line codes including discrete multi-tone (DMT) and carrierless phase and amplitude (CAP). The modem includes: components coupled to one another to form a transmit path and a receive path. The components include an encoder component and a Fourier transform component. The encoder component encodes data associated with a CAP communication channel into QAM symbols and encodes data associated with a DMT communication channel into DMT sub-symbols. The Fourier transform component couples to the encoder component on the transmit path for transforming DMT sub-symbols from a frequency-to-time domain and for transforming QAM symbols from the time-to-frequency domain followed by a filtering in the frequency domain and a subsequent transformation back from the frequency-to-time domain to effect a pulse shaping function without requiring a discrete pulse shaping component in the transmit path.

摘要翻译： 支持多个X-DSL线路码的X-DSL调制解调器，包括离散多音（DMT）和无载波相位和幅度（CAP）。 调制解调器包括：彼此耦合以形成发送路径和接收路径的组件。 组件包括编码器组件和傅里叶变换组件。 编码器部件将与CAP通信信道相关联的数据编码为QAM符号，并将与DMT通信信道相关联的数据编码为DMT子符号。 傅立叶变换分量耦合到发送路径上的编码器部件，用于从频域转换DMT子符号，并用于从时域到频域变换QAM符号，随后在频域中进行滤波，并且 从频域到时域的后续变换，以实现脉冲整形功能，而不需要发射路径中的离散脉冲整形分量。

公开(公告)号：US06937616B1

公开(公告)日：2005-08-30

申请号：US09620779

申请日：2000-07-21

申请人： Behrooz Rezvani ,  Sam Heidari ,  Avadhani Shridhar ,  Omprakash S. Samaru ,  Firooz Massoudi

发明人： Behrooz Rezvani ,  Sam Heidari ,  Avadhani Shridhar ,  Omprakash S. Samaru ,  Firooz Massoudi

IPC分类号： H04J3/22 ,  H04L12/28 ,  H04M11/06

CPC分类号： H04L12/2883 ,  H04L12/2856 ,  H04M11/062

摘要： A method and apparatus for digital subscriber line (xDSL) communications between one or more digital signal processors (DSPs) and analog front ends (AFEs) each coupled to corresponding subscriber line(s). The apparatus transports channels of data between subscribers and the DSP(s). The apparatus includes a bus for the transport of digital data, a DSP AFE interfaces. The DSP interfaces couples the DSP to the bus. The DSP interface accepts downstream channels of digital data from the DSP and transmits packets each associated with a corresponding one of the downstream channels to the bus. Each of the packets identifies a targeted AFEs coupled to a selected one of the subscriber lines. The AFE interfaces each couple an associated one of the AFEs to the bus. Each of the AFE interfaces transmits selected packets to a selected one of the subscriber lines for the transport to the subscriber.

摘要翻译： 一种用于一个或多个数字信号处理器（DSP）和模拟前端（AFE）之间的数字用户线（xDSL）通信的方法和装置，每个耦合到对应的用户线路。 该设备在订户和DSP之间传输数据信道。 该装置包括用于传输数字数据的总线，DSP AFE接口。 DSP接口将DSP耦合到总线。 DSP接口接收来自DSP的数字数据的下行信道，并且将与相应的一个下行信道相关联的分组发送到总线。 每个分组识别耦合到所选择的一个用户线路的目标AFE。 AFE接口将每个AFE接口中的一个耦合到总线。 每个AFE接口将所选择的分组传送到所选择的一个用户线，以便传输给用户。

公开(公告)号：US06512739B1

公开(公告)日：2003-01-28

申请号：US09779255

申请日：2001-02-07

申请人： Sam Heidari ,  Behrooz Rezvani

发明人： Sam Heidari ,  Behrooz Rezvani

IPC分类号： H04L2722

CPC分类号： H04L27/2647 ,  H04L5/14

摘要： The current invention provides a method and apparatus for downconverting received digital data from the elevated frequencies at which the data is modulated. Various multi-tone communications systems (such as DMT in wire-line communication or OFDM in wireless communication) operate by up-converting output of the modulated signal at the output of the IFFT from baseband to a higher center frequency. Therefore, at the receiver, the inverse operation is required. At the receiver the signal must be down-converted to baseband before being available for processing by the FFT. In this invention, a simplified converter is provided, where the complex multiplication required by prior art downconverters is avoided, thus simplify the downconversion process and reducing power requirements. The apparatus and method may be implemented on a physical modem or a logical modem with the logical modem including a digital signal processor (DSP) coupled to an analog front end (AFE). The communication medium may include: wired, wireless and optical. The present invention provides a signal processing architecture that supports scalability of CO/DLC/ONU resources, and allows a significantly more flexible hardware response to the evolving X-DSL standards without over committing of hardware resources. As standards evolve hardware may be reconfigured to support the new standards.

摘要翻译： 本发明提供了一种用于从接收数字数据的数据被调制的升高的频率下变频的方法和装置。 各种多音通信系统（例如有线通信中的DMT或无线通信中的OFDM）通过将IFFT的输出处的调制信号的输出从基带向上变频到较高的中心频率来进行操作。 因此，在接收机处，需要进行逆运算。 在接收机处，信号必须被下转换为基带，然后才能被FFT处理。 在本发明中，提供了一种简化的转换器，其中避免了现有技术的下变频器所需的复数乘法，从而简化了下变频处理并降低了功率需求。 该装置和方法可以在具有与模拟前端（AFE）耦合的数字信号处理器（DSP）的逻辑调制解调器的物理调制解调器或逻辑调制解调器上实现。 通信介质可以包括：有线，无线和光学。 本发明提供了支持CO / DLC / ONU资源的可扩展性的信号处理架构，并且在不超过硬件资源的情况下，允许对演进的X-DSL标准的显着更灵活的硬件响应。 随着标准的发展，硬件可能被重新配置以支持新的标准。

公开(公告)号：US06392579B1

公开(公告)日：2002-05-21

申请号：US09859196

申请日：2001-05-14

申请人： Behrooz Rezvani ,  Dale Smith ,  Sam Heidari

发明人： Behrooz Rezvani ,  Dale Smith ,  Sam Heidari

IPC分类号： H03M166

CPC分类号： H03H17/0664

摘要： An apparatus and method is disclosed for a digital-to-analog converter (DAC) system with both uniform and non-uniform sampling rates. The system includes a digital portion in which samples of a set of “N” digital samples are obtained from a digital input stream. Each set of samples is evaluated with various test decimations which may include various combinations of uniform and non-uniform timing intervals between the selected members of each decimation. Each test decimation includes substantially the same number “M” of digital samples where “M” is less than the number of samples “N” in each sample set. Each test decimation is digitally evaluated to determine which is the optimum test decimation. The optimum test decimation exhibits the best fit with the original set of “N” samples using a reduced set of “M” digital samples. This optimum test decimation along with the appropriate timing information is subject to an digital-to-analog conversion, with the corresponding analog output signal retaining a high degree of fidelity with the digital input signal albeit at a reduced average sampling rate. The reduction in sampling rate for the DAC simplifies circuit design and reduces power requirements.

摘要翻译： 公开了一种具有均匀和非均匀采样率的数模转换器（DAC）系统的装置和方法。 该系统包括数字部分，其中从数字输入流获得一组“N”个数字样本的采样。 用各种测试抽取来评估每组样本，其可以包括在每个抽取的所选择的成员之间的均匀和不均匀的定时间隔的各种组合。 每个测试抽取包括基本上相同数量的“M”数字样本，其中“M”小于每个样本集中的样本数“N”。 对每个测试抽取进行数字评估，以确定哪个是最佳测试抽取。 最佳测试抽取使用一组缩减的“M”数字样本与“N”个样本的原始集合展现出最佳匹配。 这种最佳测试抽取以及适当的定时信息经受数模转换，相应的模拟输出信号保持与数字输入信号的高度保真度，尽管平均采样率降低。 DAC的采样率的降低简化了电路设计并降低了功耗要求。

公开(公告)号：US11862001B2

公开(公告)日：2024-01-02

申请号：US17748365

申请日：2022-05-19

申请人： Sam Heidari ,  Michel Allegue Martinez ,  Amir Minayi Jalil ,  Negar Ghourchian

发明人： Sam Heidari ,  Michel Allegue Martinez ,  Amir Minayi Jalil ,  Negar Ghourchian

IPC分类号： G08B13/24 ,  G08B27/00 ,  G08B21/22

CPC分类号： G08B13/2491 ,  G08B21/22 ,  G08B27/005

摘要： The systems and method proposed herein aim to identify a mobile device or devices worn by an individual or a subject that has entered an area monitored by a passive motion detection system that uses wireless signals to sense motion in the space. The system will collect as much signals as possible from both the devices worn by the individual and from the system performing the passive (device-free) motion detection for identifying the individual or person of interest. The individual or person of interest may be a user of a product or an intruder.

公开(公告)号：US08902769B1

公开(公告)日：2014-12-02

申请号：US13200639

申请日：2011-09-26

申请人： Hossein Dehghan ,  Safiali Rouhi ,  Sam Heidari

发明人： Hossein Dehghan ,  Safiali Rouhi ,  Sam Heidari

IPC分类号： H04W4/00 ,  H04L12/413 ,  G06F15/173 ,  H04B17/00 ,  H04W72/00 ,  H04B7/00 ,  H04L12/26 ,  H04W24/00

CPC分类号： H04L12/26 ,  H04L43/08 ,  H04W24/00

摘要： A wireless access point configured to support a wireless home network among multiple wireless devices contending with one another for access to a shared wireless communication medium. The wireless access point comprises a link monitor and a link manager. The link monitor monitors communication links with each of the wireless devices and for detects oversubscription of the wireless communication medium by the communication links. The link manager couples to the link monitor and is responsive to an oversubscription indication therefrom to arbitrate access to the shared wireless communication medium among the contending wireless devices.

摘要翻译： 一种无线接入点，被配置为支持在彼此竞争的多个无线设备之间的无线家庭网络以访问共享的无线通信介质。 无线接入点包括链路监视器和链路管理器。 链路监视器监视与每个无线设备的通信链路，并且用于通过通信链路检测无线通信介质的超额预订。 链路管理器耦合到链路监视器并且响应于其中的超额预订指示来仲裁在竞争无线设备之间对共享无线通信介质的访问。

公开(公告)号：US08767657B1

公开(公告)日：2014-07-01

申请号：US13506457

申请日：2012-04-19

申请人： Hossein Dehghan ,  Sam Heidari ,  Muhammad Abdelghaffar

发明人： Hossein Dehghan ,  Sam Heidari ,  Muhammad Abdelghaffar

IPC分类号： H04W4/00

CPC分类号： H04L25/03891 ,  H04B7/0413 ,  H04B7/0871 ,  H04L25/03178 ,  H04L27/2647 ,  H04L2025/03426 ,  H04W72/04 ,  H04W84/12

摘要： A wireless device with multiple antennae and configured to support orthogonal frequency-division multiplexed (OFDM), multiple-input multiple-output (MIMO) communications of a wireless local area network (LAN) among multiple wireless devices over a shared wireless communication medium on a shared communication channel. The wireless access device comprises: a mixed-mode MIMO detector configured to allocate a mix of linear and non-linear MIMO detectors among received OFDM sub-channels of the shared communication channel, thereby reducing a level of complexity associated with reception of MIMO streams exclusively via non-linear MIMO detectors.

摘要翻译： 一种具有多个天线并被配置为支持多个无线设备中的无线局域网（LAN）的无线局域网（LAN）的多输入多输出（MIMO）通信的无线设备，其通过共享无线通信介质在 共享通信渠道。 无线接入设备包括：混合模式MIMO检测器，被配置为在共享通信信道的接收的OFDM子信道中分配线性和非线性MIMO检测器的混合，从而降低与独占的MIMO流的接收相关联的复杂度 通过非线性MIMO检测器。

公开(公告)号：US08711741B1

公开(公告)日：2014-04-29

申请号：US11807006

申请日：2007-05-24

申请人： Sam Heidari ,  Hossein Dehghan ,  Sigurd Schelstraete

发明人： Sam Heidari ,  Hossein Dehghan ,  Sigurd Schelstraete

IPC分类号： H04J1/12 ,  H04J1/16 ,  H04B3/20 ,  H04J4/00 ,  H04L5/16

CPC分类号： H04B3/20 ,  H04B3/235 ,  H04B3/54 ,  H04L5/0007 ,  H04L5/0044 ,  H04L5/0064 ,  H04L5/143 ,  H04L5/1461 ,  H04L27/265

摘要： Networked modems configurable to establish a communication system on a wired communication medium. Each modem includes: a network module, transmit and receive path modules and a frequency domain echo canceller. The network module is configured to communicate with network modules of remaining ones of the at least three modems to allocate bandwidth of the shared communications medium for at least two discrete point-to-point communication links between corresponding pairs of the at least three modems. The transmit and receive path modules are configured for multi-tone modulation and demodulation of communications on the wired communication medium and are responsive to the bandwidth allocation of the network module to concurrently process at least a first discrete point-to-point communication link with a first modem among remaining ones of the at least three modems and at least a second discrete point-to-point communication link with a second among remaining ones of the at least three modems. The frequency domain echo canceller is configured to substantially cancel leakage of the communications transmitted on the transmit path into the receive path and to enable each point-to-point communication link to support full duplex communications.

摘要翻译： 网络调制解调器可配置为在有线通信介质上建立通信系统。 每个调制解调器包括：网络模块，发射和接收路径模块和频域回波消除器。 所述网络模块被配置为与所述至少三个调制解调器中的剩余调制解调器的网络模块通信，以为所述至少三个调制解调器的相应对之间的至少两个离散点对点通信链路分配共享通信介质的带宽。 发送和接收路径模块被配置用于有线通信介质上的通信的多频调制和解调，并且响应于网络模块的带宽分配来同时处理至少第一离散点对点通信链路 所述至少三个调制解调器的剩余的调制解调器中的第一调制解调器和至少三个调制解调器的剩余的调制解调器中的至少一个的至少第二离散点对点通信链路中的第二调制解调器。 频域回波消除器被配置为基本上消除在发送路径上发送的通信到接收路径的泄漏，并且使得每个点对点通信链路能够支持全双工通信。

公开(公告)号：US08599780B2

公开(公告)日：2013-12-03

申请号：US13096885

申请日：2011-04-28

申请人： Sam Heidari ,  Ali Rouhi ,  Rajkumar Samuel

发明人： Sam Heidari ,  Ali Rouhi ,  Rajkumar Samuel

IPC分类号： H04W84/02

CPC分类号： H04W24/02 ,  H04B7/2606 ,  H04W16/20 ,  H04W16/26 ,  H04W84/045 ,  H04W84/12

摘要： A technique for expanding the range of coverage for a wireless local area network (WLAN) involves locating a wireless access point (WAP) away from an interworking unit (IWU) at the edges of the WLAN and a (typically) wired network. The WAP, when located away from the IWU, can be referred to as an untethered access point (UAP) because it communicates with the IWU on a wireless channel. Stations on the WLAN will be capable of communicating with the WAP, whether or not it is a UAP, via a known or convenient wireless protocol, such as Wi-Fi, and may or may not be capable of communicating with one another via a direct station-to-station protocol.

摘要翻译： 用于扩展无线局域网（WLAN）的覆盖范围的技术涉及将无线接入点（WAP）远离WLAN和（通常）有线网络的边缘处的互通单元（IWU）定位。 当远离IWU时，WAP可以被称为无限制接入点（UAP），因为它与无线信道上的IWU进行通信。 WLAN上的站将能够通过已知或方便的无线协议（例如Wi-Fi）与WAP通信，无论它是否是UAP，并且可能或可能不能够通过直接的方式彼此通信 站对站协议。