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1. 发明授权

US06175316B1 Bin-to-bin differential encoding apparatus and method for a discrete multi-tone transmission system 失效
标题翻译：用于离散多音调传输系统的Bin-to-bin差分编码装置和方法
公开(公告)号：US06175316B1
公开(公告)日：2001-01-16
申请号：US09287263
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： H03M510
CPC分类号： H04L27/2602 , H03M5/10
摘要： A discrete multi-tone communication system employing bin-to-bin differential encoding of data frames to be transmitted within the communication system. The bin-to-bin differential encoding utilizes the phase angle of previously encoded data to encode the current data relative to that phase angle. Hence, only a single reference tone is required to encode a first portion of the data frame into a discrete tone, and then the remaining data portions of the data frame are each subsequently encoded into discrete tones with reference to the phase angle of data already encoded into a discrete tone. Thus, to achieve decoding, a decoding device only requires the reference tone to begin decoding the discrete tones to the correct phase angle for an accurate reproduction of the original data frame.
摘要翻译：一种离散的多音通信系统，采用在通信系统内发送的数据帧的二进制差分编码。 bin到bin的差分编码利用先前编码的数据的相位角来相对于该相位角对当前数据进行编码。因此，仅需要单个参考音来将数据帧的第一部分编码成离散音调，然后参考已经编码的数据的相位角，数据帧的剩余数据部分随后被编码成离散音调变成离散的音调。因此，为了实现解码，解码装置仅需要参考音开始将离散音调解码为正确的相位角，以准确再现原始数据帧。

2. 发明授权

US5604464A Cascode operational amplifier with multiple input stage 失效
标题翻译：具有多输入级的串联运算放大器
公开(公告)号：US5604464A
公开(公告)日：1997-02-18
申请号：US499315
申请日：1995-07-07
申请人： Chien-Meen Hwang , Eugen Gershon
发明人： Chien-Meen Hwang , Eugen Gershon
IPC分类号： H03F3/45
CPC分类号： H03F3/4521 , H03F3/45188 , H03F3/45192 , H03F3/4565 , H03F3/45654 , H03F2203/45578
摘要： Disclosed herein is a cascode operational amplifier design with multiple input stages, and methods of operating the same, resulting in enhanced output gain and unity gain bandwidth operational amplifiers. The cascode operational amplifier comprises a differential input block which receives a differential input having a first differential input stage and a second differential input stage. A cascode block is coupled to the differential input block and provides a differential output for the operational amplifier. A common mode feedback block coupled to the second differential input stage of the differential input block and the differential output of the cascode block stabilizes a DC output level for the differential output. A load block is coupled to the differential output of the cascode block and applies a resistive load to the differential output in response to a differential input signal applied to the differential input block.
摘要翻译：这里公开了具有多个输入级的共源共栅运算放大器设计及其操作方法，导致增强的输出增益和单位增益带宽运算放大器。共源共栅运算放大器包括差分输入块，其接收具有第一差分输入级和第二差分输入级的差分输入。共源共栅块耦合到差分输入块，并为运算放大器提供差分输出。耦合到差分输入块的第二差分输入级的共模反馈块和共源共栅组的差分输出稳定用于差分输出的DC输出电平。负载块耦合到共源共栅块的差分输出，并响应于施加到差分输入块的差分输入信号，向差分输出施加电阻性负载。

3. 发明授权

US06246267B1 Method and apparatus for detecting a sinusoidal signal using a counter and queue 有权
标题翻译：使用计数器和队列检测正弦信号的方法和装置
公开(公告)号：US06246267B1
公开(公告)日：2001-06-12
申请号：US09286998
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： G01R2500
CPC分类号： G01R19/25
摘要： A method and apparatus for detecting a sinusoidal signal samples a received signal. An error signal generator receives at its inputs a previous sample of the received signal and a current sample of the received 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 with a first value that indicates the generated error signal is below the error threshold value for a second value that indicates a generated error signal is above the error threshold value. A determination circuit then determines whether the received signal is a sinusoidal signal based on a threshold comparison signal generated for a plurality of samples. The determination circuit includes a counter that maintains a count of the number of threshold comparison signals having the first value within a sampling period.
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接收信号的先前采样和接收信号的当前采样，并根据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产生的误差信号与误差阈值进行比较，并产生具有第一值的阈值比较信号，该第一值指示所产生的误差信号低于第二值的误差阈值，该第二值指示所产生的误差信号为高于误差阈值。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。确定电路包括计数器，其维持在采样周期内具有第一值的阈值比较信号的数量的计数。

4. 发明授权

US06651078B1 Method for determining a decimation pattern in a network communications receiver 有权
标题翻译：用于确定网络通信接收机中的抽取模式的方法
公开(公告)号：US06651078B1
公开(公告)日：2003-11-18
申请号：US09510775
申请日：2000-02-23
申请人： Eugen Gershon , Chien-Meen Hwang
发明人： Eugen Gershon , Chien-Meen Hwang
IPC分类号： G06F1717
CPC分类号： H03H17/0664
摘要： A method for selecting a decimation phase of a decimation filter includes determining a phase strength value for each phase of a plurality of phases. The quantity of phases corresponds to the decimation factor of the decimation filter. The phase strength value for a particular phase group may be representative of the sum of the magnitudes of a plurality of phase values in such particular phase group. The phase strength value for a particular phase group may represent the sum of the squares of a plurality of phase values in the group. The phase of the decimation filter is set to retain the phase with the greatest phase strength value and to filter, or decimate, the other phases.
摘要翻译：用于选择抽取滤波器的抽取相位的方法包括确定多相的各相的相位强度值。相位量对应于抽取滤波器的抽取因子。特定相位组的相位强度值可以表示这种特定相位组中的多个相位值的幅度之和。特定相位组的相位强度值可以表示组中的多个相位值的平方和。设置抽取滤波器的相位以保持具有最大相位强度值的相位并且对其它相进行滤波或抽取。

5. 发明授权

US06449262B1 Method and apparatus for frequency shifting with a clock signal 有权
标题翻译：用时钟信号进行频移的方法和装置
公开(公告)号：US06449262B1
公开(公告)日：2002-09-10
申请号：US09286993
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： H04J400
CPC分类号： H04L27/0002 , H04L27/2626 , 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 an analog front end (AFE) circuit that frequency shifts the spectral images by using a clock signal. The multiplication of the clock signal is accomplished using a digital mixer or, in the alternative, an analog switch.
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设备包括通过使用时钟信号对频谱图像进行频移的模拟前端（AFE）电路。时钟信号的相乘使用数字混频器或者替代的模拟开关实现。

6. 发明授权

US06441683B1 Device and method for recovering frequency redundant data in a network communications receiver 失效
标题翻译：在网络通信接收机中恢复频率冗余数据的装置和方法
公开(公告)号：US06441683B1
公开(公告)日：2002-08-27
申请号：US09897198
申请日：2001-07-02
申请人： Chien-Meen Hwang , Eugen Gershon
发明人： Chien-Meen Hwang , Eugen Gershon
IPC分类号： H04L2722
CPC分类号： H04L27/0008 , H04L1/04
摘要： A demodulation circuit for recovering frequency redundant quadrature amplitude modulated data comprises an A/D converter generating digitized carrier signal. A mixer receives the digitized carrier and generates a frequency shifted I-signal and a frequency shifted Q-signal. A bank of filters includes a narrow band filter centered at each one of a plurality frequency shifted sub-spectra to generate a digital data signal for each sub-spectrum. A selection circuit determines which one of the sub-spectrum data signals is the strongest and a receiver circuit recovers the transmitted data in response to the strongest sub spectrum data signal.
摘要翻译：用于恢复频率冗余正交幅度调制数据的解调电路包括产生数字化载波信号的A / D转换器。混频器接收数字化的载波并产生频移的I信号和频移的Q信号。滤波器组包括以多个频移子频谱中的每一个为中心的窄带滤波器，以产生每个子频谱的数字数据信号。选择电路确定哪个子频谱数据信号是最强的，并且接收机电路响应于最强的子频谱数据信号来恢复发送的数据。

7. 发明授权

US06434188B1 Differential encoding arrangement for a discrete multi-tone transmission system 有权
标题翻译：用于离散多音调传输系统的差分编码装置
公开(公告)号：US06434188B1
公开(公告)日：2002-08-13
申请号：US09286989
申请日：1999-04-07
申请人： Chien-Meen Hwang , Hungming Chang , Maged F. Barsoum , Muoi V. Huynh , Eugen Gershon , Fred Berkowitz , Bin Guo
发明人： Chien-Meen Hwang , Hungming Chang , Maged F. Barsoum , Muoi V. Huynh , Eugen Gershon , Fred Berkowitz , Bin Guo
IPC分类号： H04B138
CPC分类号： H04L27/2602
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 modulates data, such as a bit-pair, to a new constellation point based on the value of the bit-pair and a prior position of a consecutively-preceding constellation point, such that the data is represented by the difference in positions between the consecutively-preceding constellation point and the new constellation point. The constellation points are then used to modulate a selected one of the tone signals. Although a receiver detecting the modulated tone signal may recover the transmitted constellation points at different absolute positions due to distortion on he network medium, the relative difference between the consecutively-preceding constellation point and the new constellation point is preserved, enabling the receiver to recover the transmitted data based on the relative difference in positions of the consecutive constellation points. Hence, entire bit stream can reliably transmitted using position changes between consecutive constellation points.
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。发射机基于比特对的值和连续前面的星座点的先前位置，将诸如比特对的数据调制到新的星座点，使得数据由连续前面的星座点和新的星座点。然后使用星座点来调制所选择的一个音调信号。虽然检测调制音信号的接收机可以由于网络介质上的失真而恢复在不同绝对位置处的发射星座点，但保持连续前面的星座点与新星座点之间的相对差异，使得接收机能够恢复基于连续星座点的位置的相对差异发送数据。因此，使用连续星座点之间的位置变化可以可靠地发送整个比特流。

8. 发明授权

US6075795A Collision detection system for multiple stations in discrete multi-tone data communications network 有权
标题翻译：用于离散多音数据通信网络中多站的碰撞检测系统
公开(公告)号：US6075795A
公开(公告)日：2000-06-13
申请号：US286994
申请日：1999-04-07
申请人： Maged F. Barsoum , Chien-Meen Hwang , Hungming Chang , Muoi V. Huynh , Eugen Gershon
发明人： Maged F. Barsoum , Chien-Meen Hwang , Hungming Chang , Muoi V. Huynh , Eugen Gershon
IPC分类号： H04J3/24
CPC分类号： H04L12/413 , H04W74/0825 , H04L27/2626 , H04L5/0046 , H04L5/006 , H04L5/0091
摘要： A novel collision detecting method is provided at the physical layer for use in a multi-point DMT communication network having stations transmitting over common media. The method includes generating a collision code corresponding to ID information of a station. A collision symbol representing the collision code is transmitted at the beginning of a portion of a random access data communication. A station in the network receives the collision symbol and decodes a collision signal carried by the collision symbol. A collision event is detected if the collision signal does not satisfy pre-set requirements. For example, energy of each component of the collision signal may be compared with a predetermined minimum energy level to generate a code element for each component having energy exceeding the predetermined minimum energy level. Validity of the code having the generated code elements is determined based on a predetermined validity criterion. Also, the distance in frequency domain between components of the collision signal corresponding to the generated code elements is compared with a predetermined minimum distance in frequency domain, to confirm validity of the detected code.
摘要翻译：在物理层提供了一种新颖的冲突检测方法，用于具有通过公共媒体传送的站点的多点DMT通信网络。该方法包括生成与站的ID信息对应的冲突码。在随机访问数据通信的一部分的开始处发送表示冲突码的冲突符号。网络中的站接收冲突符号并解码由碰撞符号携带的冲突信号。如果碰撞信号不满足预先设定的要求，则检测到碰撞事件。例如，可以将冲突信号的每个分量的能量与预定的最小能级进行比较，以产生具有超过预定最小能级的能量的每个分量的代码元素。基于预定的有效性标准确定具有生成的代码元素的代码的有效性。此外，将与生成的代码元素相对应的冲突信号的分量之间的频域的距离与频域中的预定最小距离进行比较，以确认检测到的代码的有效性。

9. 发明授权

US06590893B1 Adaptive transmission system in a network 有权
标题翻译：自适应传输系统在网络中
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。

10. 发明授权

US06252428B1 Method and apparatus for detecting a sinusoidal signal 有权
标题翻译：用于检测正弦信号的方法和装置
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。

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