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：US08514917B1

公开(公告)日：2013-08-20

申请号：US12661243

申请日：2010-03-12

申请人： Sam Heidari ,  Qasem Aldrubi ,  Felipe Fuks ,  Hossein Dehghan-Fard

发明人： Sam Heidari ,  Qasem Aldrubi ,  Felipe Fuks ,  Hossein Dehghan-Fard

IPC分类号： H04L5/16

CPC分类号： H04L5/16 ,  H04B3/32 ,  H04M11/062

摘要： A digital subscriber line ‘XDSL’ communication system for provisioning multi-tone modulated communications over two subscriber lines with two modems. The first modem has shared and discrete components forming a transmit path coupled exclusively to an end of a first of the two subscriber lines and a receive path coupled exclusively to an end of a second of the two subscriber lines. The second modem also has shared and discrete components forming a transmit path and a receive path having couplings of transmit and receive path components to corresponding opposing ends of the two subscriber lines diametrically opposite to those of the first modem, whereby the modems provision the first subscriber line exclusively for unidirectional communication from the first to the second modem, and provision the second subscriber line for unidirectional communication in the opposite direction, specifically from the second modem to the first modem. A related method and modem are disclosed.

摘要翻译： 一种用于通过具有两个调制解调器的两个用户线路提供多音调调制通信的数字用户线“XDSL”通信系统。 第一调制解调器具有形成专用于两个用户线中的第一个的一端的发送路径的共享和离散组件，以及专用于两条用户线中的第二个用户线的一端的接收路径。 第二调制解调器还具有形成传输路径的共享和离散组件以及具有发射和接收路径组件的耦合的接收路径到与第一调制解调器的两个用户线的直径相反的两个用户线的对应端的接收路径，由此调制解调器提供第一订户 专用于从第一调制解调器到第二调制解调器的单向通信，并且将第二用户线路在相反方向，特别是从第二调制解调器提供给第一调制解调器的单向通信。 公开了一种相关方法和调制解调器。

公开(公告)号：US08671128B1

公开(公告)日：2014-03-11

申请号：US11981847

申请日：2007-10-30

申请人： Hossein Dehghan ,  Karl Kowk Ho Yick ,  Sam Heidari

发明人： Hossein Dehghan ,  Karl Kowk Ho Yick ,  Sam Heidari

IPC分类号： G06F17/10 ,  H03H7/30 ,  H03H7/40 ,  H03K5/159

CPC分类号： H03H17/06 ,  H03H17/0223 ,  H03H17/0292 ,  H03H17/0294 ,  H04B1/71057

摘要： A finite impulse response filter (FIR) for processing a communication channel. The FIR comprises a delay line, a tap processor and a summer. The delay line has “N” taps to successive portions of the communication channel. The delay line shifts the successive portions of the communication channel once in each symbol processing interval. The tap processor subjects each of the “N” taps to a first scaling utilizing first scaling coefficients associated with filtering the current symbol interval and further subjects at least one of the “N” taps to a second scaling by a second scaling coefficient associated with filtering the prior symbol interval. The summer generates in each symbol interval a filtered output comprising a sum of the “N” scaled taps from the first scaling in the prior symbol interval and the second scaling of the at least one tap in the current symbol interval, thereby increasing an order of the FIR without corresponding increase in an order of the delay line.

摘要翻译： 一种用于处理通信信道的有限脉冲响应滤波器（FIR）。 FIR包括延迟线，抽头处理器和夏季。 延迟线对通信信道的连续部分具有“N”个抽头。 延迟线在每个符号处理间隔中移动通信信道的连续部分一次。 抽头处理器利用与滤波当前符号间隔相关联的第一缩放系数对“N”抽头中的每一个进行第一缩放，并且使“N”个抽头中的至少一个进行第二缩放，与通过滤波相关联的第二缩放系数 先前符号间隔。 夏天在每个符号间隔产生包括来自先前符号间隔中的第一缩放的“N”个标度的抽头和当前符号间隔中的至少一个抽头的第二缩放的滤波输出，从而增加 FIR没有相应增加延迟线的顺序。

公开(公告)号：US08462751B1

公开(公告)日：2013-06-11

申请号：US13466328

申请日：2012-05-08

申请人： Hossein Dehghan ,  Sam Heidari

发明人： Hossein Dehghan ,  Sam Heidari

IPC分类号： H04W4/00

CPC分类号： H04L12/1485 ,  H04L12/2803 ,  H04W16/04 ,  H04W16/14 ,  H04W84/12

摘要： A geolocation utilization manager for managing wireless local area networks (WLAN) each supporting wireless communications between an associated access point node and associated station nodes on a corresponding one of a plurality of communication channels. The geolocation utilization manager for aggregating channel utilization information from the WLANs, and consolidating channel usage between neighboring underutilized ones of the WLANs, thereby maximizing utilization of a shared channel between neighboring underutilized ones of the WLANs. Whereby underutilized neighboring WLANs otherwise utilizing unique channels instead share a single channel, thereby freeing up other communication channels across an available WiFi, IEEE 802.11 or other such spectrum.

摘要翻译： 一种用于管理无线局域网（WLAN）的地理位置利用管理器，每个无线局域网支持在多个通信信道中相应的一个通信信道上的相关接入点节点和相关联的站节点之间的无线通信。 地理位置利用管理器，用于聚合来自WLAN的信道利用信息，以及整合WLAN中相邻未充分利用的信道之间的信道使用，从而最大化在相邻的未充分利用的WLAN之间的共享信道的利用。 由于利用不足的相邻WLAN，否则利用唯一信道来共享单个信道，从而通过可用的WiFi，IEEE 802.11或其他此类频谱释放其他通信信道。

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：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：US08345859B2

公开(公告)日：2013-01-01

申请号：US12009196

申请日：2008-01-16

申请人： Sam Heidari ,  Sigurd Schelstraete ,  Aner Tennen ,  Elango Pakriswamy ,  Chun-Sup Kim ,  Luiz Felipe Fuks

发明人： Sam Heidari ,  Sigurd Schelstraete ,  Aner Tennen ,  Elango Pakriswamy ,  Chun-Sup Kim ,  Luiz Felipe Fuks

IPC分类号： H04M1/00 ,  H04M9/00 ,  H04M7/00

CPC分类号： H04M11/062

摘要： A XDSL line card including an allocator for allocating power to the multi-tone modulated communications on each of the subscriber lines, and for selecting control parameters sufficient to effect communications on each of the subscriber lines at a power level proximate to an allocated power level therefore. The line card also includes configurable components coupled to one another to form a transmit path and a receive path to couple to the digital subscriber lines. The configurable components are responsive to the control parameters selected by the allocator to initialize multi-tone communications over each of the plurality of subscriber lines at a power level proximate the allocated power level.

摘要翻译： 一种XDSL线路卡，包括用于为每个用户线路上的多音调调制通信分配功率的分配器，并且用于选择足以在接近分配的功率电平的功率电平上在每个用户线上进行通信的控制参数 。 线卡还包括彼此耦合的可配置组件以形成发送路径和接收到数字用户线路的接收路径。 可配置组件响应于由分配器选择的控制参数，以在接近分配的功率电平的功率电平上初始化多个用户线中的每一个上的多音通信。

公开(公告)号：US20080069193A1

公开(公告)日：2008-03-20

申请号：US11901346

申请日：2007-09-15

申请人： Avadhani Shridhar ,  Sam Heidari ,  Rouben Toumani ,  Ying Wu

发明人： Avadhani Shridhar ,  Sam Heidari ,  Rouben Toumani ,  Ying Wu

IPC分类号： H04B1/38

CPC分类号： H04L5/006 ,  H04L5/0042 ,  H04L5/0046

摘要： A multi-tone transceiver including: a channel controller and a plurality of components forming a transmit path and a receive path. The channel controller configured to determine bit-loading for each successive symbol or tone set based on a 1st noise margin target for a first subset of tones in each tone set dedicated to transport of a robust communications channel (RCC) and based on a 2nd noise margin target less than the 1st noise margin target for remaining tones in each tone set dedicated to a standard communications channel (SCC). The plurality of components forming the transmit and receive paths are responsive to the channel controller to select for data modulated on a given tone at least one of smaller constellations and higher gain scaling levels when the given tone corresponds to an RCC tone as compared to an SCC tone, whereby the first set of tones dedicated to the RCC exhibit greater immunity to noise variations than the remaining tones dedicated to the SCC.

摘要翻译： 一种多音调收发器，包括：信道控制器和形成发送路径和接收路径的多个组件。 信道控制器，被配置为基于专用于传输鲁棒通信信道的每个音调集合中的第一音调子集，确定每个连续符号或音调集合的比特加载（...） RCC），并且基于小于专用于标准通信信道（SCC）的每个音调集合中的剩余音调的小于噪声余量目标的2 nd nd噪声容限目标。 形成发送和接收路径的多个组件响应于信道控制器，以便在给定音调对应于RCC音调与SCC相比时，为给定音调调制的数据中的至少一个较小星座和较高增益缩放级别 音调，由此专用于RCC的第一组音调比专用于SCC的剩余音调具有更大的对噪声变化的抗扰度。

公开(公告)号：US07035326B1

公开(公告)日：2006-04-25

申请号：US10071536

申请日：2002-02-08

申请人： Sam Heidari ,  Mazen M. Shihabi ,  Saman Behtash ,  Hojat Khelghati ,  John Gevargiz ,  Avadhani Sridhar ,  Fernando Ramirez-Mireles

发明人： Sam Heidari ,  Mazen M. Shihabi ,  Saman Behtash ,  Hojat Khelghati ,  John Gevargiz ,  Avadhani Sridhar ,  Fernando Ramirez-Mireles

IPC分类号： H03H7/40 ,  H04B1/38

CPC分类号： H04L5/0046 ,  H04L5/1438

摘要： The present invention provides a method and apparatus for demodulating data received over a communication medium carrying a transmission having multiple pilot tones with pilot data modulated thereon and message tones with message data modulated thereon and with the pilot tones and message tones frequency division multiplexed with respect to one another. In an embodiment of the invention the communication protocol utilized for modulation and demodulation is discrete multi tone (DMT). The invention allows message processing and equalizer training to proceed in parallel before equalizer training tables have been completed thus reducing the time associated with modem initialization. The apparatus in one embodiment of the invention includes on the receive path of a DMT or other multi-tone modem, a fast Fourier transform engine (FFT), a message processor, and a decoder. The FFT converts the received data from a time domain to a frequency domain. The received data in the frequency domain includes successive sets of pilot tones together with message tones. The message processor selects pairs of message and pilot tones proximate to one another in the frequency domain in each set of pilot tones and message tones. The message tone in each pair is then equalized with the pilot tone in the pair to substantially remove frequency dependent phase shifts imparted by the communication medium to the message tone. The equalized message tone is then decoded in the decoder to the corresponding specific set of message data which it represents.

摘要翻译： 本发明提供一种方法和装置，用于解调在载有具有调制其上的导频数据的多个导频音调的传输的通信媒体上接收的数据，以及在其上调制了消息数据的消息音，并且相对于 另一个。 在本发明的实施例中，用于调制和解调的通信协议是离散多音（DMT）。 本发明允许消息处理和均衡器训练在均衡器训练表已经完成之前并行进行，从而减少与调制解调器初始化相关联的时间。 本发明的一个实施例中的装置包括在DMT或其他多音调制解调器的接收路径上，快速傅里叶变换引擎（FFT），消息处理器和解码器。 FFT将接收的数据从时域转换为频域。 频域中接收到的数据包括连续的导频音集以及消息音。 消息处理器在每组导频音和消息音中在频域中选择彼此接近的消息和导频音对。 然后，每对中的消息音调与该对中的导频音调相等，以基本上消除由通信媒体向消息音色赋予的频率相关相移。 然后，均衡消息音在解码器中被解码为它所表示的对应的特定消息数据组。

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。