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111. 发明授权

US06999504B1 System and method for canceling crosstalk 有权
标题翻译：消除串扰的系统和方法
公开(公告)号：US06999504B1
公开(公告)日：2006-02-14
申请号：US09808760
申请日：2001-03-15
申请人： Daniel Amrany , Patrick Duvaut , William Keasler , Laurent Pierrugues
发明人： Daniel Amrany , Patrick Duvaut , William Keasler , Laurent Pierrugues
IPC分类号： H04B1/38 , H04L5/16
CPC分类号： H04L5/20
摘要： A method and apparatus are disclosed for reducing crosstalk in a telecommunication system. Broadly, the present invention utilizes a common mode signal to obtain additional information that can be used to better approximate the transmitted signal (by approximating and canceling crosstalk or otherwise). In accordance with one embodiment of the invention, a modem is provided having improved crosstalk cancellation circuitry for canceling crosstalk received on a local loop (or otherwise estimating the remotely transmitted signal) carrying modem communications. The modem includes a first input for receiving a signal carried on the local loop and a second input for receiving a signal obtained from the common mode. The modem further includes processing circuitry configured to either reduce crosstalk present in the signal carried on the local loop, or to otherwise closely approximate the remotely transmitted signal. Using both the first and second signals allows the processing circuitry of the modem to obtain more accurate results.
摘要翻译：公开了一种用于减少电信系统中的串扰的方法和装置。广义上，本发明利用共模信号来获得可用于更好地近似发送信号的附加信息（通过近似和消除串扰或以其他方式）。根据本发明的一个实施例，提供了具有改进的串扰消除电路的调制解调器，用于消除承载调制解调器通信的本地环路（或另外估计远程发送的信号）上接收到的串扰。调制解调器包括用于接收本地环路上承载的信号的第一输入端和用于接收从共模模式获得的信号的第二输入端。调制解调器还包括处理电路，其被配置为减少存在于本地环路上携带的信号中的串扰，或者以其他方式紧密接近远程发送的信号。使用第一和第二信号允许调制解调器的处理电路获得更准确的结果。

112. 发明申请

US20050018837A1 Method and system for mitigating fourier transform side lobes 有权
标题翻译：减轻傅里叶变换旁瓣的方法和系统
公开(公告)号：US20050018837A1
公开(公告)日：2005-01-27
申请号：US10849569
申请日：2004-05-20
申请人： Patrick Duvaut , Ehud Langberg , Albert Rapaport , William Sholtz , Faina Shmulyian
发明人： Patrick Duvaut , Ehud Langberg , Albert Rapaport , William Sholtz , Faina Shmulyian
IPC分类号： H04L27/26 , H04M1/24 , H04M3/08 , H04M3/22
CPC分类号： H04L27/2602 , H04L27/2614
摘要： The present invention is directed to implementing theoretical foundations of frequency domain methods aiming to locally decrease the impact of aggregate side lobes of a few discrete frequency tones, in the vicinity of other “victim” frequencies. The family of frequency methods referred to makes use of one or more “canceller tones.” The “canceller tones” loads are optimized to minimize the aggregate power in the neighborhood of the victim frequencies. An exemplary method for decreasing an impact of aggregate side lobes of one or more discrete frequency tones in the vicinity of one or more victim tones comprises the steps of calculating an aggregate power of one or more side lobes of one or more disturber tones within a victim bandwidth; determining at least one optimal load to minimize the aggregate power wherein the at least one optimal load comprises a linear combination of the one or more disturber tones; and applying the at least one optimal load to one or more canceller tones for minimizing the impact of the one or more side lobes of the one or more disturber tones.
摘要翻译：本发明旨在实现频域方法的理论基础，旨在局部地减小在其他“受害者”频率附近的几个离散频率的聚集旁瓣的影响。所提及的频率方法族使用一个或多个“消除音”。优化“消除音”负载以最小化受害者频率附近的总功率。减少一个或多个受害音调附近的一个或多个离散频率音调的聚集旁瓣的影响的示例性方法包括以下步骤：计算受害者中一个或多个干扰音的一个或多个旁波的总功率带宽; 确定至少一个最佳负载以最小化所述总功率，其中所述至少一个最佳负载包括所述一个或多个干扰调制音的线性组合; 以及将所述至少一个最佳负载应用于一个或多个消除器音调，以最小化一个或多个干扰音调的一个或多个旁瓣的影响。

113. 发明授权

US06744824B1 Multiple access method, devices for performing this method and communications systems using these methods 失效
标题翻译：多种访问方法，用于执行此方法的设备和使用这些方法的通信系统
公开(公告)号：US06744824B1
公开(公告)日：2004-06-01
申请号：US09704680
申请日：2000-11-03
申请人： Patrick Duvaut , Thierry Jesupret , Marc Marie Ghislain Durvaux
发明人： Patrick Duvaut , Thierry Jesupret , Marc Marie Ghislain Durvaux
IPC分类号： H04K102
CPC分类号： H04L5/02
摘要： A multiple access method for use in a point to multipoint communications network includes a step of allocating a respective unique variable (&rgr;1, . . . , &rgr;i, . . . , &rgr;n) to each respective network terminal of this communications network, a first all-pass filtering operation on at least one oversampled symbol which is derived from upstream information to be transmitted by a terminal (T1;Ti) to a central station (CS) of said communications network, a next step of filtering a received oversampled symbol stream at said central station (CS) for enabling said central station to discriminate therefrom said at least one oversampled symbol that was earlier transmitted by said network terminal (T1;Ti) to said central station (CS), said all-pass filtering operation having a z-transform transfer function ({overscore (c)}i(z)) such that the zeroes thereof correspond to said respective unique variables assigned to all other network terminals, except the unique variable (&rgr;1;&rgr;i) assigned to said network terminal (T1;Ti), whereby said next step of filtering consists of performing the z-transform on said received oversampled symbol stream, and of evaluating said z-transform at the unique variable (&rgr;1;&rgr;i) assigned to said network terminal (T1;Ti). A transmitter and receiver for performing this method are as well disclosed.
摘要翻译：在点对多点通信网络中使用的多址方法包括将相应的唯一变量（rho1，...，rhoi，...，rhon）分配给该通信网络的每个相应网络终端的步骤，第一全部对从由终端（T1; Ti）发送到所述通信网络的中心站（CS）的上游信息导出的至少一个过采样符号进行下列步骤：对接收的过采样符号流进行滤波的下一步骤所述中心站（CS）用于使所述中心站能够将先前由所述网络终端（T1; Ti）发送的所述至少一个过采样符号与所述中央站（CS）进行区分，所述全通滤波操作具有z - 转移传递函数（{overscore（ci（z）），使得其零值对应于分配给所有其他网络终端的所述各个唯一变量，除了分配给sai的唯一变量（rho1; rhoi） d网络终端（T1; Ti），由此所述下一个过滤步骤包括对所接收的过采样符号流执行z变换，以及分配给所述网络终端的唯一变量（rho1; rhoi）来评估所述z变换（T1; Ti）。用于执行该方法的发射机和接收机也被公开。

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