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1. 发明授权

US5539746A Contention resolution scheme for communications systems 失效
标题翻译：通信系统竞争解决方案
公开(公告)号：US5539746A
公开(公告)日：1996-07-23
申请号：US422750
申请日：1995-04-14
申请人： Gang Huang , Mai-Huong Nguyen , Jean-Jacques Werner
发明人： Gang Huang , Mai-Huong Nguyen , Jean-Jacques Werner
IPC分类号： G06F13/00 , G06F13/374 , G06F15/16 , G06F15/177 , H04L29/06 , H04J3/14 , G06F9/46
CPC分类号： H04L29/06 , G06F13/374
摘要： Timing control resolution between two communications devices is provided by assigning each device to one of a plurality of priorities and by transmitting an identification of this priority to the other communications device. The determination of which device is the master and which device is the slave is then resolved by comparing the received and transmitted identifications from the contending devices to a predetermined ranking of identification signals. When such identifications signals are the same, each device randomly selects an identification signal from a group of such signals. Preferably this group includes all of the identification signals except that transmitted in the immediately prior contention round. The received and transmitted identifications signals from the contending devices are then compared to the predetermined ranking of identification signals. This random selection of identification signals, transmission and comparison are repeated until the transmitted and received identifications signals are different and contention is resolved or a predetermined number of contention rounds is reached.
摘要翻译：通过将每个设备分配给多个优先级中的一个并且通过将该优先级的标识发送给另一个通信设备来提供两个通信设备之间的定时控制分辨率。然后，通过将来自竞争装置的接收和发送的标识与标识信号的预定等级进行比较，来解析哪个装置是主装置和哪个装置是从装置的确定。当这种标识信号相同时，每个设备从一组这样的信号中随机选择一个识别信号。优选地，该组包括除了在紧接在前的争用轮中传送的所有识别信号。然后将来自竞争装置的接收和发送的标识信号与预定的识别信号等级进行比较。重复这种随机选择的识别信号，传输和比较，直到发送和接收的标识信号不同并且争用解决或达到预定数量的争用轮次。

2. 发明授权

US5521949A Synchronization scheme for digital communications systems transporting data at a customer-controlled rate 失效
标题翻译：以客户控制的速率传输数据的数字通信系统的同步方案
公开(公告)号：US5521949A
公开(公告)日：1996-05-28
申请号：US891500
申请日：1992-05-29
申请人： Gang Huang , Jean-Jacques Werner
发明人： Gang Huang , Jean-Jacques Werner
IPC分类号： H04B3/23 , H04L27/34 , H04L23/00 , H04L5/12
CPC分类号： H04L27/3455
摘要： A synchronization scheme for bidirectional data applications where the customer supplies data for transmission at a rate which is customer controlled. In accordance with the present invention, in each transmission direction, the customer data is converted into data symbols in a predetermined constellation. In response to these data symbols, additional symbols are added. In the disclosed embodiment, the additional symbols added are symbols lying outside of the constellation and are not used to represent customer data. The additional symbols added raise the symbol rate in each transmission direction to one higher than that provided by the symbols representative of the customer data alone. This higher symbol rate in each transmission direction is preferably the same, or the higher symbol rate in one direction is related to the higher symbol rate in the other direction by a rational number. At each receiver, the additional symbols are removed and customer data is recovered from its representative data symbols.
摘要翻译：用于双向数据应用的同步方案，其中客户以用户控制的速率提供用于传输的数据。根据本发明，在每个传输方向上，客户数据被转换成预定星座中的数据符号。响应于这些数据符号，添加附加符号。在所公开的实施例中，添加的附加符号是位于星座之外的符号，并且不用于表示客户数据。添加的附加符号将每个传输方向的符号速率提高到比代表客户数据的符号提供的符号速率高一个。每个发送方向上的这种较高的符号率优选相同，或者一个方向上较高的符号率与另一个方向上的较高符号率相关联。在每个接收机处，除去附加符号并从其代表数据符号恢复客户数据。

3. 发明授权

US5483551A Crosstalk suppression technique 失效
标题翻译：串扰抑制技术
公开(公告)号：US5483551A
公开(公告)日：1996-01-09
申请号：US100584
申请日：1993-07-30
申请人： Gang Huang , Gi-Hong Im , Jean-Jacques Werner
发明人： Gang Huang , Gi-Hong Im , Jean-Jacques Werner
IPC分类号： H04M1/74 , H04B3/20 , H04B3/23 , H04B7/015 , H04B1/38 , H04L5/16
CPC分类号： H04B3/23
摘要： To reduce near-end crosstalk (NEXT) in systems possessing excess bandwidth, a signal is transmitted from a first to a second location. At the second location, the received signal is examined and a characteristic of this signal is determined while the delay provided in the transmit signal path at this location is varied. Based on this examination, a particular amount of delay is introduced into the transmit signal path which reduces NEXT. This process is repeated for each direction of transmission. In the disclosed embodiment, the characteristic of the received signal which is determined is the mean square error and the amount of delay selected is that corresponding to the minimum mean square error.
摘要翻译：为了减少具有超额带宽的系统中的近端串扰（NEXT），信号从第一位置传输到第二位置。在第二位置，检测接收到的信号，并且确定该信号的特性，同时在该位置处的发送信号路径中提供的延迟是变化的。基于该检查，将特定量的延迟引入到减少NEXT的发送信号路径中。对于每个传输方向重复该过程。在所公开的实施例中，确定的接收信号的特性是均方误差，所选择的延迟量是对应于最小均方误差。

4. 发明授权

US6009083A Cascade echo canceler arrangement 失效
标题翻译：级联回波消除器布置
公开(公告)号：US6009083A
公开(公告)日：1999-12-28
申请号：US22708
申请日：1998-02-12
申请人： Richard Thomas Flanagan , Jean-Jacques Werner
发明人： Richard Thomas Flanagan , Jean-Jacques Werner
IPC分类号： H04B3/23
CPC分类号： H04B3/23
摘要： The problem of tracking rapid changes in the echo signals associated with modems is eliminated by using an echo canceler consisting of cascaded adaptive filters. Each filter in the structure contributes to the modeling of the overall echo path impulse response, with a longer filter providing the ability to model long echo path impulse responses and a shorter filter providing the ability to track changes in the echo path impulse response over time.
摘要翻译：通过使用由级联自适应滤波器组成的回波消除器来消除跟踪与调制解调器相关联的回波信号的快速变化的问题。该结构中的每个滤波器有助于对整个回波路径脉冲响应的建模，其中较长的滤波器提供对长回波路径脉冲响应建模的能力，以及较短的滤波器，提供跟踪随时间的回波路径脉冲响应变化的能力。

5. 发明授权

US5805696A Echo canceller adaptation technique 失效
标题翻译：回波消除器适应技术
公开(公告)号：US5805696A
公开(公告)日：1998-09-08
申请号：US762554
申请日：1996-12-09
申请人： Gi-Hong Im , Burton Reuben Saltzberg , Jean-Jacques Werner
发明人： Gi-Hong Im , Burton Reuben Saltzberg , Jean-Jacques Werner
IPC分类号： H04M9/08 , H04M1/00 , G06F17/10 , H04B3/20
CPC分类号： H04M9/082
摘要： A device for providing conferencing communications. The device comprises: a summing circuit for forming a signal sum equal to a sum of signals received from at least three information signal sources along with an echo compensation signal, the signal received from each information source including echoes and the signal sum including an aggregation of such echoes; an adaptive filter having an input and an output, the input being solely responsive to the signal sum and the output being only coupled to the summing circuit, the filter forming the echo compensation signal which is an estimate of the aggregation of echoes; and a low level training sequence generator having an amplitude less than a predetermined level. The adaptive filter has coefficients whose respective values are varied in response to a training sequence comprising a plurality of a priori known values supplied by the low level training sequence generator and the predetermined level is below that of the signal received from the each information source.
摘要翻译：用于提供会议通信的设备。该装置包括：求和电路，用于形成等于从至少三个信息信号源接收的信号之和以及回波补偿信号的信号总和，从包括回波的每个信息源接收的信号和包括聚合的信号和这样的回声; 具有输入和输出的自适应滤波器，所述输入仅响应于所述信号和并且所述输出仅耦合到所述求和电路，所述滤波器形成作为所述回波的聚合的估计的所述回波补偿信号; 以及具有小于预定电平的振幅的低电平训练序列发生器。自适应滤波器具有响应于包括由低电平训练序列发生器提供的多个先验已知值的训练序列而变化的系数，并且预定电平低于从每个信息源接收的信号的训练序列。

6. 发明授权

US5524025A Coding for digital transmission 失效
标题翻译：数字传输编码
公开(公告)号：US5524025A
公开(公告)日：1996-06-04
申请号：US976625
申请日：1992-11-16
申请人： Victor B. Lawrence , Arun N. Netravali , Jean-Jacques Werner
发明人： Victor B. Lawrence , Arun N. Netravali , Jean-Jacques Werner
IPC分类号： H03M13/00 , H04B14/04 , H04L27/34 , H04N5/44 , H04N7/08 , H04N7/26 , H04N7/30 , H04B7/00 , H04B15/00
CPC分类号： H04L27/3427 , H04L27/3488 , H04N5/4401 , H04N7/08
摘要： Digital signals, such as digitized television signals, are subjected to a source coding step followed by a channel mapping step. The source coding step causes the television signal to be represented by two or more data streams while, in the channel mapping step, the mapping is such that the data elements of the various data streams have differing probabilities of being erroneously detected at the receiver. In preferred embodiments, a first one of the aforementioned data streams carries components of the overall television signal which are regarded as the most important--for example the audio, the framing information, and the vital portions of the video information, such as motion compensation information--and that data stream is mapped such that its data elements have the lowest probability of error. A second one of the data streams carries components of the overall television signal which are regarded as less important than those of the first data stream and that data stream is mapped such that its data elements have a probability of error that is not as low as those of the first data stream. In general, it is possible to represent the overall television signal with any number of data streams, each carrying components of varying importance and each having a respective probability of error. This approach allows a graceful degradation in reception quality at, for example, the television set location because as the bit error rate at the receiver begins to increase with increasing distance from the broadcast transmitter, the bits that represent proportionately less of the video information will be the first to be affected.
摘要翻译：诸如数字化电视信号的数字信号经受源编码步骤之后是频道映射步骤。源编码步骤使得电视信号由两个或多个数据流表示，而在信道映射步骤中，映射使得各种数据流的数据元素具有在接收机处被错误检测的不同概率。在优选实施例中，前述数据流中的第一数据流携带被认为是最重要的整个电视信号的组件，例如视频信息的音频，成帧信息和重要部分，诸如运动补偿信息并且该数据流被映射，使得其数据元素具有最低的错误概率。数据流中的第二个携带整个电视信号的组件，这些组件被认为不如第一数据流的那些重要，并且该数据流被映射，使得其数据元素的误差概率不如那些低的第一个数据流。通常，可以用任何数量的数据流表示整个电视信号，每个数据流携带不同重要性并且各自具有相应的误差概率的分量。这种方法允许在例如电视机位置处的接收质量的平稳降级，因为随着距离广播发射机的距离的增加，接收机的比特错误率开始增加，所以代表比例较小的视频信息的比特将是首先受到影响

7. 发明授权

US5164963A Coding for digital transmission 失效
标题翻译：数字传输编码
公开(公告)号：US5164963A
公开(公告)日：1992-11-17
申请号：US611225
申请日：1990-11-07
申请人： Victor B. Lawrence , Arun N. Netravali , Jean-Jacques Werner
发明人： Victor B. Lawrence , Arun N. Netravali , Jean-Jacques Werner
IPC分类号： H03M13/00 , H04B14/04 , H04L27/34 , H04N5/44 , H04N7/08 , H04N7/26 , H04N7/30
CPC分类号： H04L27/3427 , H04L27/3488 , H04N5/4401 , H04N7/08
摘要： Digital signals, such as digitized television signals, are subjected to a source coding step followed by a channel mapping step. The source coding step causes the television signal to be represented by two or more data streams while, in the channel mapping step, the mapping is such that the data elements of the various data streams have differing probabilities of being erroneously detected at the receiver. In preferred embodiments, a first one of the aforementioned data streams carries components of the overall television signal which are regarded as the most important--for example the audio, the framing information, and the vital portions of the video information, such as motion compensation information--and that data stream is mapped such that its data elements have the lowest probability of error. A second one of the data streams carries components of the overall television signal which are regarded as less important than those of the first data stream and that data stream is mapped such that its data elements have a probability of error that is not as low as those of the first data stream. In general, it is possible to represent the overall television signal with any number of data streams, each carrying components of varying importance and each having respective probability of error. This approach allows a graceful degradation in reception quality at, for example, the television set location because as the bit error rate at the receiver begins to increase with increasing distance from the broadcast transmitter, the bits that represent proportionately less of the video information will be the first to be affected.

8. 发明授权

US06333920B1 Frequency division duplexing system which accommodates symmetric and asymmetric channels 失效
标题翻译：频分双工系统，适用于对称和不对称的通道
公开(公告)号：US06333920B1
公开(公告)日：2001-12-25
申请号：US08926497
申请日：1997-09-08
申请人： Mai-Huong Nguyen , Jean-Jacques Werner
发明人： Mai-Huong Nguyen , Jean-Jacques Werner
IPC分类号： H04J100
CPC分类号： H04L5/143 , H04M11/062
摘要： A communications system employs frequency division duplexing to accommodate symmetric and asymmetric services, while substantially eliminating near-end cross talk. Upstream and downstream channels are separated by a guard band in order to insure that near-end cross talk is kept to a minimum. An asymmetric upstream channel is preferably located at a lower frequency range than that of the asymmetric downstream channel. The guard band between these asymmetric upstream and downstream channels shifts in frequency along with the shift in frequency of the respective upstream and downstream channels as a function of reach. This guard band shifting permits the communications systems to utilize a greater percentage of the frequencies available to it and to thereby substantially maximize the communications rate that it can support. Although the asymmetric guard band is allowed to shift in the manner described, it is not allowed to do so in a manner that would create a conflict with symmetric channels. Additionally, for symmetric services upstream channels are provided both above and below a downstream channel and are located so as not to interfere with asymmetric channels.
摘要翻译：通信系统采用频分双工技术来适应对称和非对称业务，同时基本消除近端串扰。上游和下游通道被保护带隔开，以确保将近端串扰保持在最低限度。非对称上行信道优选位于比不对称下行信道的频率范围更低的频率范围。这些不对称上行和下行信道之间的保护频带随着各个上行和下行信道的频率偏移而随着距离的变化而变化。这种保护频带移位允许通信系统利用可用的更大百分比的频率，从而使其可以支持的通信速率基本上最大化。虽然允许非对称保护频带以所描述的方式进行移位，但是不允许以与对称信道产生冲突的方式这样做。另外，对于对称业务，在下游信道的上方和下方提供上行信道，并且被定位成不干扰非对称信道。

9. 发明授权

US06252903B1 Blind start-up of a dual mode CAP-QAM receiver 失效
标题翻译：双模式CAP-QAM接收机的盲启动
公开(公告)号：US06252903B1
公开(公告)日：2001-06-26
申请号：US09109364
申请日：1998-07-02
申请人： Jean-Jacques Werner , Jian Yang
发明人： Jean-Jacques Werner , Jian Yang
IPC分类号： H04L2701
CPC分类号： H04L25/03044 , H04L25/0305 , H04L25/4921 , H04L27/38 , H04L2025/0342 , H04L2025/03509 , H04L2025/03617 , H04L2025/0363 , H04L2025/03732
摘要： A receiver has a dual mode of operation—a carrierless amplitude modulation/phase modulation (CAP) mode and a quadrature amplitude modulation (QAM) mode-yet only requires a single equalizer structure for both the CAP mode of operation and the QAM mode of operation during blind start-up. The receiver uses the same blind equalization updating algorithm independent of the type of received signal for converging the equalizer structure. The blind equalization updating algorithm incorporates a constant R, whose value is a function of the type of received signal, e.g., a QAM signal or a CAP signal. The type of received signal is determined as a function of the in-phase component of the mean-squared error, E[e2n.
摘要翻译：接收机具有双重操作模式 - 无载波幅度调制/相位调制（CAP）模式和正交幅度调制（QAM）模式 - 但是仅需要CAP操作模式和QAM操作模式的单个均衡器结构在盲人启动期间。接收机使用与接收信号类型无关的盲均衡更新算法，用于收敛均衡器结构。盲均衡更新算法包含常数R，其值是接收信号类型的函数，例如QAM信号或CAP信号。接收信号的类型被确定为均方误差E [e2n]的同相分量的函数。

10. 发明授权

US6075816A Windowing technique for blind equalization 失效
标题翻译：盲均衡的窗口技术
公开(公告)号：US6075816A
公开(公告)日：2000-06-13
申请号：US757207
申请日：1996-11-27
申请人： Jean-Jacques Werner , Jian Yang
发明人： Jean-Jacques Werner , Jian Yang
IPC分类号： H03H15/00 , H03H17/00 , H03H21/00 , H04B3/06 , H04L25/03 , H04L25/49 , H04L27/01 , H04L27/38 , H03N7/30
CPC分类号： H04L25/0305 , H04L25/4921 , H04N5/211
摘要： A blind convergence technique is restricted to using a subset of equalizer output samples. Illustratively, a receiver implements a windowed MMA approach. In this windowed MMA approach, a sample window overlays the two-dimensional plane representing the set of equalizer output samples. Only those equalizer output samples appearing within the sample window are used during filter adaptation.
摘要翻译：盲收敛技术被限制为使用均衡器输出样本的子集。说明性地，接收机实现窗口化的MMA方法。在这种窗口化的MMA方法中，样本窗口覆盖表示均衡器输出样本集的二维平面。滤波器适配期间仅使用出现在样本窗口内的均衡器输出样本。

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