公开(公告)号：US07515640B1

公开(公告)日：2009-04-07

申请号：US10633498

申请日：2003-08-05

申请人： Maged F. Barsoum ,  Fred Berkowitz

发明人： Maged F. Barsoum ,  Fred Berkowitz

IPC分类号： H04K1/10

CPC分类号： H04L5/1438 ,  H04L1/04 ,  H04L1/08 ,  H04L5/0007 ,  H04L5/0046

摘要： A system for communicating in a discrete multitone system includes a transmitting station and a receiving station. The transmitting station transmits redundant sets of data on each of a number of different tones. The receiving station receives the redundant sets of data and identifies the data represented by the redundant sets of data using a voting scheme, such as a majority voting scheme.

摘要翻译： 用于在离散多音系统中进行通信的系统包括发射站和接收站。 发送站在多个不同音调的每一个上发送冗余数据集。 接收站接收冗余数据集，并且使用诸如多数投票方案的投票方案来识别由冗余数据集合表示的数据。

公开(公告)号：US06590893B1

公开(公告)日：2003-07-08

申请号：US09286997

申请日：1999-04-07

申请人： Chien-Meen Hwang ,  Eugen Gershon ,  Maged F. Barsoum ,  Hungming Chang ,  Muoi V. Huynh ,  Fred Berkowitz ,  Bin Guo

发明人： Chien-Meen Hwang ,  Eugen Gershon ,  Maged F. Barsoum ,  Hungming Chang ,  Muoi V. Huynh ,  Fred Berkowitz ,  Bin Guo

IPC分类号： H04J306

CPC分类号： H04L1/1819 ,  H04L1/1678 ,  H04L1/189 ,  H04L27/2608

摘要： A network node configured for transmitting and receiving data to and from other network nodes is able to adapt the transmission rate based on the network conditions. The node initially transmits the data to a receiving node at a first rate. If the data is not received error-free, the node is able to reduce the number of data bits of the current packet that are being transmitted and to increase the amount of redundant data. The node repeats the process until error-free transmission is obtained.

摘要翻译： 配置用于向和从其他网络节点发送和接收数据的网络节点能够根据网络条件来适应传输速率。 节点首先以第一速率将数据发送到接收节点。 如果数据没有无错误地接收，则该节点能够减少正在发送的当前分组的数据比特数，并增加冗余数据量。 节点重复该过程，直到获得无差错的传输。

公开(公告)号：US06252428B1

公开(公告)日：2001-06-26

申请号：US09286991

申请日：1999-04-07

申请人： Maged F. Barsoum ,  Hungming Chang ,  Eugen Gershon ,  Chien-Meen Hwang ,  Muoi V. Huynh

发明人： Maged F. Barsoum ,  Hungming Chang ,  Eugen Gershon ,  Chien-Meen Hwang ,  Muoi V. Huynh

IPC分类号： H03K906

CPC分类号： G01R29/04 ,  G01R19/2506

摘要： A method and apparatus for detecting a sinusoidal signal samples a received signal. An error signal generator receives at its inputs two previous samples of the signal and a current sample of the signal and generates an error signal based on these previous and current samples. A comparison circuit compares the generated error signal for the current sample to an error threshold value and generates a threshold comparison signal that indicates whether the generated error signal is below the error threshold value. A determination circuit then determines whether the received signal is a sinusoidal signal based on the threshold comparison signals that are generated for a plurality of samples.

摘要翻译： 用于检测正弦信号的接收信号的采样方法和装置。 误差信号发生器在其输入端接收信号的两个先前样本和信号的当前样本，并且基于这些先前和当前采样产生误差信号。 比较电路将当前采样的所生成的误差信号与误差阈值进行比较，并产生指示所生成的误差信号是否低于误差阈值的阈值比较信号。 然后，确定电路基于为多个样本生成的阈值比较信号来确定接收到的信号是否是正弦信号。

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：US07729435B2

公开(公告)日：2010-06-01

申请号：US11834712

申请日：2007-08-07

申请人： Mahmoud H. Ismail ,  Waleed Youris ,  Maged F. Barsoum ,  Nabil Yousef

发明人： Mahmoud H. Ismail ,  Waleed Youris ,  Maged F. Barsoum ,  Nabil Yousef

IPC分类号： H04K1/10 ,  H04L27/28

CPC分类号： H04L27/2656 ,  H04L27/2678

摘要： Detecting Null symbols in a video data frame comprises sending OFDM symbols through a sliding windowed correlation process having a correlation window length proportional to a cyclic prefix length and a delay equal to a FFT size of the symbols, wherein output peaks of the process occur where two similar portions of the symbols coincide; checking peaks in windows sized equal to a duration of a symbol; determining whether the peaks are located in the middle of the windows; determining whether a shift has occurred in the location of the peak of a current window compared to in a second immediately previous window; determining whether the peak in a first immediately previous window is weak compared to that in a second immediately previous window; and declaring that a Null symbol exists in the first previous window when the shift has occurred and the determination of a weak peak exists.

摘要翻译： 检测视频数据帧中的空符号包括通过具有与循环前缀长度成比例的相关窗口长度和等于符号的FFT大小的延迟的滑动窗口相关处理来发送OFDM符号，其中过程的输出峰值发生在两个 符号的相似部分重合; 检查窗口大小等于符号持续时间的峰值; 确定峰是否位于窗的中间; 确定当前窗口的峰值位置与第二个紧接在前的窗口相比是否发生位移; 确定在第一紧邻前一窗口中的峰值是否比在第二紧接的前一窗口中的峰值弱; 并且当发生移位并且存在弱峰值的确定时，声明在第一先前窗口中存在空符号。

公开(公告)号：US06947530B1

公开(公告)日：2005-09-20

申请号：US10292471

申请日：2002-11-13

申请人： Maged F. Barsoum

发明人： Maged F. Barsoum

IPC分类号： H04L1/00 ,  H04L7/04 ,  H04L7/06 ,  H04L27/26

CPC分类号： H04L5/0048 ,  H04L1/0006 ,  H04L5/006 ,  H04L5/0085 ,  H04L7/048 ,  H04L25/022 ,  H04L25/0226 ,  H04L27/2662

摘要： A system selects a tone at which a pilot sequence is to be transmitted. The system includes logic configured to adaptively select a tone on which the pilot sequence is transmitted based one or more conditions in the transmission system.

摘要翻译： 系统选择要发送导频序列的音调。 该系统包括被配置为根据传输系统中的一个或多个条件自适应地选择发送导频序列的音调的逻辑。

公开(公告)号：US06577598B1

公开(公告)日：2003-06-10

申请号：US09286996

申请日：1999-04-07

申请人： Chien-Meen Hwang ,  Hungming Chang ,  Eugen Gershon ,  Muoi Huynh ,  Maged F. Barsoum

发明人： Chien-Meen Hwang ,  Hungming Chang ,  Eugen Gershon ,  Muoi Huynh ,  Maged F. Barsoum

IPC分类号： H04J1500

CPC分类号： H04L27/2608

摘要： A random-access local network having multiple nodes provides data communication across residential wiring such as telephone line as a network medium, where each node accesses the network medium using discrete multi-tone (DMT) modulated symbols. The effects of amplitude and phase distortion of transmitted DMT symbols are overcome, without the necessity of complex equalizers, by differentially encoding data prior to transmission, and recovering the transmitted data by comparing phase differentials between consecutive symbol tones. Each transmitted symbol is composed of a plurality of tone signals, each tone signal modulated according to a constellation point in a complex domain. A transmitter in a first node transmits a training symbol onto a network medium, where the DMT tones of the training symbol have an equal predetermined amount of energy. A second node, having received the training symbol from the network medium, transmits the received symbol as a retransmitted training symbol back onto the network medium. The first node receives the retransmitted training symbol and checks the energy level of each DMT tone of the retransmitted training symbol. Hence, the first node can identify certain DMT tones of the retransmitted training symbol as highly attenuated if the respective energy levels fall below a prescribed threshold. The first node then selects the DMT tones for transmission by avoiding the certain DMT tones that are highly attenuated.

摘要翻译： 具有多个节点的随机接入本地网络提供诸如作为网络媒体的电话线等住宅布线之间的数据通信，其中每个节点使用离散多音（DMT）调制符号来访问网络介质。 通过在传输之前对数据进行差分编码，并且通过比较连续符号音之间的相位差来恢复发送的数据，克服了传输的DMT符号的幅度和相位失真的影响，而不需要复数均衡器。 每个发送的符号由多个音调信号组成，每个音调信号根据复杂域中的星座点进行调制。 第一节点中的发射机将训练符号发送到网络介质上，其中训练符号的DMT音调具有相等的预定量的能量。 已经从网络介质接收到训练符号的第二节点将接收的符号作为重传的训练符号发送回网络介质。 第一节点接收重传的训练符号并且检查重传的训练符号的每个DMT音调的能级。 因此，如果相应的能量级别低于规定的阈值，则第一节点可以将重传的训练符号的某些DMT音调识别为高度衰减。 然后，第一节点通过避免高度衰减的某些DMT音调来选择用于发送的DMT音调。

公开(公告)号：US06456602B1

公开(公告)日：2002-09-24

申请号：US09286992

申请日：1999-04-07

申请人： Chien-Meen Hwang ,  Muoi V. Huynh ,  Maged F. Barsoum ,  Hungming Chang ,  Eugen Gershon

发明人： Chien-Meen Hwang ,  Muoi V. Huynh ,  Maged F. Barsoum ,  Hungming Chang ,  Eugen Gershon

IPC分类号： H04J300

CPC分类号： H04L7/033 ,  H04B7/12 ,  H04L27/2647

摘要： A physical layer device (PHY) device in a home LAN employs discrete multitone technology (DMT). The DMT system enables usage of existing residential wiring, which typically is telephone system grade twisted copper pair. The PHY device comprises a spectral image selection circuit to increase frequency diversity by examining all the images captured by a filter and restoring the transmitted signal based upon an image that may not be associated with the carrier frequency but its harmonics. Alternatively, the PHY device adjusts the sampling rate of its digital to analog convertor and accordingly filters to achieve desired grouping of spectral images.

摘要翻译： 家庭LAN中的物理层设备（PHY）设备采用离散多音频技术（DMT）。 DMT系统能够使用现有的住宅布线，这通常是电话系统级双绞线对。 PHY设备包括频谱图像选择电路，以通过检查由滤波器捕获的所有图像来增加频率分集，并且基于可能不与载波频率但其谐波相关联的图像来恢复所发送的信号。 或者，PHY设备调整其数模转换器的采样率，并因此滤波以实现期望的光谱图像分组。

公开(公告)号：US06442173B1

公开(公告)日：2002-08-27

申请号：US09286995

申请日：1999-04-07

申请人： Maged F. Barsoum ,  Chien-Meen Hwang ,  Eugen Gershon ,  Fred Berkowitz ,  Muoi V. Huynh

发明人： Maged F. Barsoum ,  Chien-Meen Hwang ,  Eugen Gershon ,  Fred Berkowitz ,  Muoi V. Huynh

IPC分类号： H04J324

CPC分类号： H04L5/023 ,  H04L27/2607 ,  H04L27/2613

摘要： A random access data network in accord with the invention will utilize discrete multi-tone (DMT) transmission over a link within a home or other premises, such as over existing in-house telephone wiring. Discrete multi-tone communication in a random access implementation raises a number of timing issues. To address these issues, all packet transmissions through the network will begin with one or more cycles of a defined periodic signal, typically a sinusoid at a specified frequency. All timing of decoding of subsequent signals, such as ID signals and DMT symbols, is based on counting signal sampling intervals following the detected timing mark. The preferred embodiment utilizes differential modulation of the tones within the DMT symbol. Each packet may include a reference symbol to enable demodulation of the first DMT data symbol. Also, the preferred embodiment of the DMT symbol includes a prefix code followed by the actual DMT waveform carrying the modulated information. The prefix code corresponds to a fixed number of samples of time-domain data, such as a copy of the last thirty-two samples used to generate the actual DMT waveform.

摘要翻译： 根据本发明的随机接入数据网络将利用家庭或其他场所内的链路上的离散多音（DMT）传输，例如通过现有的内部电话线路。 随机访问实现中的离散多音通信引发了许多定时问题。 为了解决这些问题，通过网络的所有分组传输将以定义的周期信号的一个或多个周期开始，通常是指定频率的正弦波。 后续信号（例如ID信号和DMT符号）的所有解码定时都是基于检测到的定时标记之后的计数信号采样间隔。 优选实施例利用DMT符号内的音调的差分调制。 每个分组可以包括用于使得能够解调第一DMT数据符号的参考符号。 此外，DMT符号的优选实施例包括一个前缀码，后面是携带调制信息的实际DMT波形。 前缀码对应于固定数量的时域数据采样，例如用于生成实际DMT波形的最后三十二个采样的副本。

公开(公告)号：US06339599B1

公开(公告)日：2002-01-15

申请号：US09286987

申请日：1999-04-07

申请人： Chien-Meen Hwang ,  Hungming Chang ,  Maged F. Barsoum ,  Muoi V. Huynh ,  Eugen Gershon ,  Fred Berkowitz

发明人： Chien-Meen Hwang ,  Hungming Chang ,  Maged F. Barsoum ,  Muoi V. Huynh ,  Eugen Gershon ,  Fred Berkowitz

IPC分类号： H04J324

CPC分类号： H04L27/2626 ,  H04L27/2071 ,  H04L27/2647 ,  H04M11/062

摘要： A novel collision detecting method at the physical layer is provided for use in a multi-point DMT communication system. A time mark transmitted at the beginning of a portion of a random access data communication is followed by an ID signal for identifying the communication station. The ID signal produced based on the time mark may be transmitted between the time mark and a data portion of the random access data communication. The time mark distorted by a communication channel is received by a receiver of the station that transmitted it. An additional ID signal representing the same ID data as the ID signal is produced based on the received time mark. The additional ID signal is compared with the ID signal received from the communication channel. A collision event is detected if the incoming ID signal does not match the additional ID signal. In response to the detection of the collision event, the transmission of the data portion is terminated.

摘要翻译： 提供了一种用于物理层的新型碰撞检测方法，用于多点DMT通信系统。 在随机访问数据通信的一部分的开始处发送的时间标记之后是用于识别通信站的ID信号。 可以在时间标记与随机访问数据通信的数据部分之间发送基于时间标记产生的ID信号。 由通信信道失真的时间标记由发送它的站的接收机接收。 基于接收到的时间标记产生表示与ID信号相同的ID数据的附加ID信号。 将附加ID信号与从通信信道接收的ID信号进行比较。 如果进入的ID信号与附加的ID信号不匹配，则检测到碰撞事件。 响应于碰撞事件的检测，数据部分的传输被终止。