-
公开(公告)号：US08787488B2
公开(公告)日：2014-07-22
申请号：US12534643
申请日：2009-08-03
摘要： The present invention effectively cancels echo, near-end crosstalk and far-end crosstalk. A FEXT canceller is placed at the transmitter rather than at the receiver according to an aspect of the invention. In some embodiment, a FEXT canceller can be placed at the receiver only or the combination of both ends. The FEXT canceller is continuously adapted with information sent back from a remote receiver and with data from a neighbor transmitter that causes the crosstalk at the remote receiver. This allows the FEXT canceller to quickly adapt to a change in crosstalk function or conditions with the surrounding environment, for example, aging, temperature, humidity, physical pressure, etc. In some embodiments, an adaptation control signal is sent back from the receiver to the transmitter by using an overhead bit in the frame format. In some embodiments, part of the FEXT canceller is built-in at the remote receiver.
摘要翻译： 本发明有效地消除了回波，近端串扰和远端串扰。 根据本发明的一个方面，FEXT消除器被放置在发射器而不是接收器处。 在一些实施例中，FEXT消除器可以仅放置在接收器处或两端的组合。 FEXT消除器连续地适应从远程接收机发回的信息和来自邻近发射机的数据，其导致远程接收机处的串扰。 这允许FEXT消除器快速适应与周围环境（例如老化，温度，湿度，物理压力等）的串扰功能或条件的变化。在一些实施例中，自适应控制信号从接收器发送回 发送器通过使用帧格式的开销位。 在一些实施例中，FEXT消除器的一部分内置在远程接收器中。
-
公开(公告)号：US20090290622A1
公开(公告)日：2009-11-26
申请号：US12534643
申请日：2009-08-03
IPC分类号： H04B1/38
摘要： The present invention effectively cancels echo, near-end crosstalk and far-end crosstalk. A FEXT canceller is placed at the transmitter rather than at the receiver according to an aspect of the invention. In some embodiment, a FEXT canceller can be placed at the receiver only or the combination of both ends. The FEXT canceller is continuously adapted with information sent back from a remote receiver and with data from a neighbor transmitter that causes the crosstalk at the remote receiver. This allows the FEXT canceller to quickly adapt to a change in crosstalk function or conditions with the surrounding environment, for example, aging, temperature, humidity, physical pressure, etc. In some embodiments, an adaptation control signal is sent back from the receiver to the transmitter by using an overhead bit in the frame format. In some embodiments, part of the FEXT canceller is built-in at the remote receiver.
摘要翻译： 本发明有效地消除了回波，近端串扰和远端串扰。 根据本发明的一个方面，FEXT消除器被放置在发射器而不是接收器处。 在一些实施例中，FEXT消除器可以仅放置在接收器处或两端的组合。 FEXT消除器连续地适应从远程接收器发回的信息和来自邻近发射机的数据，这些数据导致远端接收机的串扰。 这允许FEXT消除器快速适应与周围环境（例如老化，温度，湿度，物理压力等）的串扰功能或条件的变化。在一些实施例中，自适应控制信号从接收器发送回 发送器通过使用帧格式的开销位。 在一些实施例中，FEXT消除器的一部分内置在远程接收器中。
-
公开(公告)号：US20060056502A1
公开(公告)日：2006-03-16
申请号：US10944168
申请日：2004-09-16
申请人： Mark Callicotte , Hiroshi Takatori
发明人： Mark Callicotte , Hiroshi Takatori
IPC分类号： H03K5/159
CPC分类号： H03H21/0067 , H03H21/0001 , H03H21/0012
摘要： An adaptive transversal filter having tap weights Wj which are products of corresponding tap coefficients Cj and tap gains Mj is provided. A filter control loop controls all of the tap coefficients Cj such that an error signal derived from the filter output is minimized. One or more tap control loops controls a tap gain Mk such that the corresponding tap coefficient Ck satisfies a predetermined control condition. For example, |Ck| can be maximized subject to a constraint |Ck|≦Cmax, where Cmax is a predetermined maximum coefficient value. In this manner, the effect of quantization noise on the coefficients Cj can be reduced. Multiple tap control loops can be employed, one for each tap. Alternatively, a single tap control loop can be used to control multiple taps by time interleaving.
摘要翻译： 提供了具有作为对应抽头系数C SUB和抽头增益M SUB的产品的抽头权重的自适应横向滤波器。 滤波器控制环控制所有抽头系数C SUB，使得从滤波器输出导出的误差信号最小化。 一个或多个抽头控制回路控制抽头增益M SUB，使得相应的抽头系数C k满足预定的控制条件。 例如，| C＆lt; k＆gt; | 可以受到约束的最大化;其中C max是预定的最大系数值。 以这种方式，可以减小量化噪声对系数C SUB的影响。 可以采用多个抽头控制回路，每个抽头一个。 或者，可以使用单抽头控制回路来通过时间交织来控制多个抽头。
-
公开(公告)号：US07570685B2
公开(公告)日：2009-08-04
申请号：US10959622
申请日：2004-10-05
IPC分类号： H04B1/38
摘要： The present invention effectively cancels echo, near-end crosstalk and far-end crosstalk. A FEXT canceller is placed at the transmitter rather than at the receiver according to an aspect of the invention. In some embodiment, a FEXT canceller can be placed at the receiver only or the combination of both ends. The FEXT canceller is continuously adapted with information sent back from a remote receiver and with data from a neighbor transmitter that causes the crosstalk at the remote receiver. This allows the FEXT canceller to quickly adapt to a change in crosstalk function or conditions with the surrounding environment, for example, aging, temperature, humidity, physical pressure, etc. In some embodiments, an adaptation control signal is sent back from the receiver to the transmitter by using an overhead bit in the frame format. In some embodiments, part of the FEXT canceller is built-in at the remote receiver.
摘要翻译： 本发明有效地消除了回波，近端串扰和远端串扰。 根据本发明的一个方面，FEXT消除器被放置在发射器而不是接收器处。 在一些实施例中，FEXT消除器可以仅放置在接收器处或两端的组合。 FEXT消除器连续地适应从远程接收器发回的信息和来自邻近发射机的数据，这些数据导致远端接收机的串扰。 这允许FEXT消除器快速适应与周围环境（例如老化，温度，湿度，物理压力等）的串扰功能或条件的变化。在一些实施例中，自适应控制信号从接收器发送回 发送器通过使用帧格式的开销位。 在一些实施例中，FEXT消除器的一部分内置在远程接收器中。
-
公开(公告)号：US20050074055A1
公开(公告)日：2005-04-07
申请号：US10959622
申请日：2004-10-05
申请人： Hiroshi Takatori , Kenneth Dyer , Mark Callicotte
发明人： Hiroshi Takatori , Kenneth Dyer , Mark Callicotte
摘要： The present invention effectively cancels echo, near-end crosstalk and far-end crosstalk. A FEXT canceller is placed at the transmitter rather than at the receiver according to an aspect of the invention. In some embodiment, a FEXT canceller can be placed at the receiver only or the combination of both ends. The FEXT canceller is continuously adapted with information sent back from a remote receiver and with data from a neighbor transmitter that causes the crosstalk at the remote receiver. This allows the FEXT canceller to quickly adapt to a change in crosstalk function or conditions with the surrounding environment, for example, aging, temperature, humidity, physical pressure, etc. In some embodiments, an adaptation control signal is sent back from the receiver to the transmitter by using an overhead bit in the frame format. In some embodiments, part of the FEXT canceller is built-in at the remote receiver.
摘要翻译： 本发明有效地消除了回波，近端串扰和远端串扰。 根据本发明的一个方面，FEXT消除器被放置在发射器而不是接收器处。 在一些实施例中，FEXT消除器可以仅放置在接收器处或两端的组合。 FEXT消除器连续地适应从远程接收器发回的信息和来自邻近发射机的数据，这些数据导致远端接收机的串扰。 这允许FEXT消除器快速适应与周围环境（例如老化，温度，湿度，物理压力等）的串扰功能或条件的变化。在一些实施例中，自适应控制信号从接收器发送回 发送器通过使用帧格式的开销位。 在一些实施例中，FEXT消除器的一部分内置在远程接收器中。
-
公开(公告)号：US20050070228A1
公开(公告)日：2005-03-31
申请号：US10910155
申请日：2004-08-02
申请人： Susuma Hara , Mark Callicotte
发明人： Susuma Hara , Mark Callicotte
摘要： Interference reduction with a current-mode transversal filter having taps including binary current sources is provided. Each binary current source provides an output current having either of two distinct values, depending on a binary input. The product of a tap coefficient and an interference data signal value is obtained by independently generating the contribution from each interference data bit using a binary current source and providing these contributions to a current summing junction. Binary current sources can be implemented in analog, digital, or mixed-mode circuitry. Echo, near end cross talk, and far end cross talk are examples of interference that can be reduced in this manner. The use of binary current sources provides significant flexibility, especially in connection with multilevel modulation schemes such as pulse amplitude modulation (PAM).
-
公开(公告)号：US06934265B2
公开(公告)日：2005-08-23
申请号：US10910155
申请日：2004-08-02
申请人： Susuma Hara , Mark Callicotte
发明人： Susuma Hara , Mark Callicotte
摘要： Interference reduction with a current-mode transversal filter having taps including binary current sources is provided. Each binary current source provides an output current having either of two distinct values, depending on a binary input. The product of a tap coefficient and an interference data signal value is obtained by independently generating the contribution from each interference data bit using a binary current source and providing these contributions to a current summing junction. Binary current sources can be implemented in analog, digital, or mixed-mode circuitry. Echo, near end cross talk, and far end cross talk are examples of interference that can be reduced in this manner. The use of binary current sources provides significant flexibility, especially in connection with multilevel modulation schemes such as pulse amplitude modulation (PAM).
摘要翻译： 提供了具有包括二进制电流源的抽头的电流模式横向滤波器的干扰减少。 根据二进制输入，每个二进制电流源提供具有两个不同值之一的输出电流。 抽头系数和干扰数据信号值的乘积是通过使用二进制电流源独立地产生来自每个干扰数据位的贡献，并将这些贡献提供给电流求和结点。 二进制电流源可以在模拟，数字或混合模式电路中实现。 回波，近端串扰和远端串扰是可以以这种方式减少的干扰的示例。 使用二进制电流源提供了显着的灵活性，特别是与诸如脉冲幅度调制（PAM）的多电平调制方案有关。
-
-
-
-
-
-
搜索结果
7 条记录 (耗时 0.014 秒)
