公开(公告)号：US07529229B1

公开(公告)日：2009-05-05

申请号：US10847596

申请日：2004-05-17

申请人： Andrew L. Norrell ,  Dale M. Walsh ,  Don Bellenger

发明人： Andrew L. Norrell ,  Dale M. Walsh ,  Don Bellenger

IPC分类号： H04L12/66

CPC分类号： H04L12/5692

摘要： A local area network connected to an infrastructure access device that provides the home LAN with access to voice, data and television services. The infrastructure access device includes a gateway to voice over Internet Protocol services, an interface to a data network for data access, a router to multiplex signals from the gateways and the data network and a Digital Subscriber Line (DSL) transceiver connected to a gateway device in the customer premises. The gateway device includes a DSL transceiver to communicate over the DSL connecting it to the infrastructure access device to provide the home LAN with high performance communications services without the use of POTS. The DSL transceiver may communicate using a switched carrier modulation scheme to conserve power and reduce crosstalk.

摘要翻译： 连接到基础设施接入设备的局域网，其为家庭LAN提供对语音，数据和电视服务的访问。 基础设施接入设备包括通过因特网协议服务语音的网关，用于数据访问的数据网络的接口，用于复用来自网关和数据网络的信号的路由器以及连接到网关设备的数字用户线（DSL）收发器 在客户处所。 网关设备包括DSL收发器，用于通过DSL将DSL连接到基础设施接入设备，以便在不使用POTS的情况下为家庭LAN提供高性能通信服务。 DSL收发器可以使用交换载波调制方案进行通信，以节省功率并减少串扰。

公开(公告)号：US06421388B1

公开(公告)日：2002-07-16

申请号：US09085737

申请日：1998-05-27

申请人： Vladimir Parizhsky ,  Dale M. Walsh ,  Vitali Vinokour

发明人： Vladimir Parizhsky ,  Dale M. Walsh ,  Vitali Vinokour

IPC分类号： H04B1404

CPC分类号： H04B14/048

摘要： A method and apparatus for determining the correct decision regions in a PCM communication receiver utilizing a public Digital Telephone Network (DTN). A receiver receives samples from an analog loop of the DTN and quantizes the samples according to a reference lattice. The reference lattice defines a set of decision levels representing the quantization level for each PCM codeword. The receiver sets the reference lattice by scaling the lattice to account for the characteristics of the communication channel, which typically includes distortions of the digital data resulting in nonlinear behavior of the channel. The scaling and re-scaling thus accounts for PCM codeword translations or other channel distortion.

摘要翻译： 一种用于在使用公共数字电话网（DTN）的PCM通信接收机中确定正确决定区域的方法和装置。 接收机从DTN的模拟环路接收样本，并根据参考点量化样本。 参考点定义了一组表示每个PCM码字的量化级别的决策级别。 接收器通过缩放晶格来设置参考点，以考虑通信信道的特性，通常包括导致信道的非线性行为的数字数据的失真。 缩放和重新缩放因此考虑了PCM码字转换或其他信道失真。

公开(公告)号：US06034993A

公开(公告)日：2000-03-07

申请号：US970836

申请日：1997-11-14

申请人： Andrew L. Norrell ,  Dale M. Walsh

发明人： Andrew L. Norrell ,  Dale M. Walsh

IPC分类号： H03H21/00 ,  H03H7/30

CPC分类号： H03H21/0012

摘要： An apparatus and method for adaptively equalizing a signal received from a remote transmitter. The equalizer includes a filter having an output and a decision circuit coupled to the filter output. In addition, the equalizer has a reference coupled to the decision circuit. The reference includes a model of a non-linear characteristic of a remote transmitter. The method relates to adaptively equalizing a signal received from a remote transmitter. The method includes the step of receiving a signal corresponding to a predetermined reference level from the remote transmitter. Next, the received signal level is filtered to remove linear error terms. The next step of the method includes measuring a non-linear error term associated with the received and filtered signal. The measured non-linear error term may then be stored and used to make improved decisions on data signals transmitted from the remote transmitter.

摘要翻译： 一种用于对从远程发射机接收的信号进行自适应均衡的装置和方法。 均衡器包括具有耦合到滤波器输出的输出和判定电路的滤波器。 另外，均衡器具有耦合到判定电路的参考。 该参考文献包括远程发射机的非线性特征的模型。 该方法涉及对从远程发射机接收的信号进行自适应均衡。 该方法包括从远程发送器接收对应于预定参考电平的信号的步骤。 接下来，对接收到的信号电平进行滤波以消除线性误差项。 该方法的下一步包括测量与接收和滤波信号相关联的非线性误差项。 测量的非线性误差项可以被存储并用于对从远程发射机发送的数据信号做出改进的决定。

公开(公告)号：US4085449A

公开(公告)日：1978-04-18

申请号：US744994

申请日：1976-11-26

申请人： Dale M. Walsh ,  Karl I. Nordling

发明人： Dale M. Walsh ,  Karl I. Nordling

IPC分类号： H04M11/06 ,  H04L27/00 ,  H04L27/36 ,  H04L27/38 ,  H04M11/00 ,  H04J3/12 ,  H04M1/76

CPC分类号： H04L27/3881 ,  H04L27/365

摘要： A digital modem comprising a discrete analog/digital converter and digital processor for high-speed digital data transmission by means of analog signals over analog transmission facilities. The analog/digital converter comprises a transmitter section including a digital-to-analog converter and an analog matching interface, and a receiver section including an analog matching interface and analog-to-digital converter. The digital processor comprises a signal processor set, a processor control set and a multiplier/memory set capable of digital manipulation and computation of digitized data signals to accomplish the required encoding, filtering, modulation, demodulation, equalization, decoding and control function.

摘要翻译： 一种数字调制解调器，包括用于通过模拟传输设施的模拟信号进行高速数字数据传输的分立模拟/数字转换器和数字处理器。 模拟/数字转换器包括包括数模转换器和模拟匹配接口的发射机部分，以及包括模拟匹配接口和模拟 - 数字转换器的接收机部分。 数字处理器包括信号处理器组，处理器控制组和能够进行数字操作和计算数字化数据信号以实现所需编码，滤波，调制，解调，均衡，解码和控制功能的乘法器/存储器组。

公开(公告)号：US5515398A

公开(公告)日：1996-05-07

申请号：US212974

申请日：1994-03-15

申请人： Dale M. Walsh ,  Vladimir Parizhsky

发明人： Dale M. Walsh ,  Vladimir Parizhsky

IPC分类号： H04B3/46 ,  H04L1/24 ,  H04L12/26 ,  H04M3/30 ,  H04B1/38 ,  H04L5/16

CPC分类号： H04L43/50 ,  H04B3/46 ,  H04L1/244 ,  H04L12/2697 ,  H04M3/30

摘要： Techniques for generating a line probing signal. The probing signal is comprised of a plurality of different tones, where the tones have a predetermined phase relationship. The signal may be sent over a communication channel, such as a telephone line. By so using the line probing signal, the non-linearity of the electrical characteristics of the telephone line may be measured with increased accuracy.

摘要翻译： 生成线路探测信号的技术。 探测信号由多个不同的音调构成，其中音调具有预定的相位关系。 信号可以通过诸如电话线的通信信道发送。 通过使用线路探测信号，可以以更高的精度来测量电话线路的电气特性的非线性。

公开(公告)号：US06853637B1

公开(公告)日：2005-02-08

申请号：US09322887

申请日：1999-05-29

申请人： Andrew L. Norrell ,  Dale M. Walsh ,  Don Bellenger

发明人： Andrew L. Norrell ,  Dale M. Walsh ,  Don Bellenger

IPC分类号： H04L12/28 ,  H04L12/66 ,  H04J3/16

CPC分类号： H04L12/5692

摘要： A local area network connected to an infrastructure access device that provides the home LAN with access to voice, data and television services. The infrastructure access device includes a gateway to voice over Internet Protocol services, an interface to a data network for data access, a router to multiplex signals from the gateways and the data network and a Digital Subscriber Line (DSL) transceiver connected to a gateway device in the customer premises. The gateway device includes a DSL transceiver to communicate over the DSL connecting it to the infrastructure access device to provide the home LAN with high performance communications services without the use of POTS. The DSL transceiver may communicate using a switched carrier modulation scheme to conserve power and reduce crosstalk.

摘要翻译： 连接到基础设施接入设备的局域网，其为家庭LAN提供对语音，数据和电视服务的访问。 基础设施接入设备包括通过因特网协议服务语音的网关，用于数据访问的数据网络的接口，用于复用来自网关和数据网络的信号的路由器以及连接到网关设备的数字用户线（DSL）收发器 在客户处所。 网关设备包括DSL收发器，用于通过DSL将DSL连接到基础设施接入设备，以便在不使用POTS的情况下为家庭LAN提供高性能通信服务。 DSL收发器可以使用交换载波调制方案进行通信，以节省功率并减少串扰。

公开(公告)号：US5008901A

公开(公告)日：1991-04-16

申请号：US115354

申请日：1987-10-29

申请人： Clifford H. Wallach ,  Robert C. Suffern ,  Dale M. Walsh

发明人： Clifford H. Wallach ,  Robert C. Suffern ,  Dale M. Walsh

IPC分类号： H04L5/14 ,  H04M11/06

CPC分类号： H04L5/143 ,  H04M11/06

摘要： A modem for connecting data terminal equipment (DTE) to a remote DTE via a general switched telephone network or leased lines at data rates of 300, 1200 and 2400 bps using standard modulation techniques, and additonally providing virtual full duplex transmission capability at 9600 bps using trellis code modulation (TCM). The high-speed 9600 bps path is implemented by asymmetrical frequency division of the available bandwidth into a high speed, wideband forward channel (9600 bps) and a low speed, narrowband backchannel (300 bps). The high speed transmitting channel is assigned to that modem having the greatest data demand and the direction is dynamically reversed whenever the amount of data awaiting transmission over the low speed channel exceeds a predetermined maximum backlog, provided that a direction reversal has not taken place for at least a specified minimum interval during which use of the forward channel is guaranteed. To improve the efficiency of the backchannel, extended data formats are added to the MNP link protocol for use in backchannel transmission and to control direction reversals on the line. The modem is implemented with three available general purpose microprocessors with interprocessor communications being synchronized by a timer driven interrupt mechanism. A hardware timer/counter built into one of these processors is used to monitor the signals on the telephone line to detect and distinguish answer tones, voice signals, busy signals, ringback signals and dial tones. A hardware counter/timer is also used to measure the width of the start bit from the serial port to form the basis for a calculation of the baud rate being used by the DTE.

摘要翻译： 调制解调器，用于使用标准调制技术，通过一般交换电话网络或租用线路将数据终端设备（DTE）连接到数据速率为300,1200和2400bps，并以9600bps的速度提供虚拟全双工传输能力，使用 网格码调制（TCM）。 高速9600bps路由通过可用带宽的不对称分频实现为高速，宽带正向信道（9600bps）和低速窄带反向信道（300bps）。 高速发送信道被分配给具有最大数据需求的调制解调器，并且只要等待低速信道传输的数据量超过预定的最大积压，则方向被动态地反转，只要方向反向没有发生在 至少指定的最小间隔，在此期间保证使用前向通道。 为了提高反向通道的效率，将扩展数据格式添加到MNP链路协议，用于反向通道传输和控制线路上的方向反转。 调制解调器由三个可用的通用微处理器实现，处理器间通信由定时器驱动的中断机制同步。 这些处理器之一内置的硬件定时器/计数器用于监视电话线上的信号，以检测和区分应答音，语音信号，忙信号，回铃信号和拨号音。 硬件计数器/定时器也用于测量串行端口起始位的宽度，以形成计算DTE使用的波特率的基础。

公开(公告)号：US4290139A

公开(公告)日：1981-09-15

申请号：US972445

申请日：1978-12-22

申请人： Dale M. Walsh

发明人： Dale M. Walsh

IPC分类号： H03H21/00 ,  H04B3/04 ,  H04B3/06 ,  H04L7/02 ,  H04L7/04 ,  H04L25/03 ,  H04L25/04 ,  H04L25/40

CPC分类号： H04L7/042 ,  H04L25/03038 ,  H04L7/046

摘要： Portions of an adaptive equalizer can be used for exact preamble synchronization by modifying the digital filter section to recognize pre-determined sequences of signals in the received signal. This may be accomplished by applying to the modifying means of the digital filter input signals which are proportional to the complex conjugate of the signals in the received signal. When the signals in the tapped delay line are aligned with this complex conjugate, the output of the summing means will be discernibly greater than otherwise. As a result, a threshold device can be used to recognize the exact baud time the preselected signals in the received signal are contained in the tapped delay line.

摘要翻译： 通过修改数字滤波器部分以识别接收到的信号中的预定信号序列，可以将自适应均衡器的部分用于准确的前同步码同步。 这可以通过应用到与接收信号中的信号的复共轭成比例的数字滤波器输入信号的修改装置来实现。 当抽头延迟线中的信号与该复共轭对齐时，求和装置的输出将明显大于否。 结果，可以使用阈值装置来识别接收信号中预选信号包含在抽头延迟线中的精确波特时间。

公开(公告)号：US5963622A

公开(公告)日：1999-10-05

申请号：US902403

申请日：1997-07-29

申请人： Dale M. Walsh

发明人： Dale M. Walsh

IPC分类号： H04M11/00

CPC分类号： H04M11/066

摘要： A method for identifying that a data communications device is operable in a predetermined mode. The first step of the method provides for generating a frequency division modulation capabilities signal. The generated signal is limited to a predetermined frequency range. The method further provides for superimposing mode identification information upon the generated signal to form a modified signal. Like the generated signal, the modified signal falls within the predetermined range. The superimposed mode identification information may be applied by frequency modulating the generated signal.

摘要翻译： 一种用于识别数据通信设备在预定模式下可操作的方法。 该方法的第一步提供了生成频分调制能力信号。 产生的信号被限制在预定的频率范围内。 该方法进一步提供了对生成的信号叠加模式识别信息以形成修改信号。 与产生的信号一样，修正信号落在预定范围内。 可以通过对生成的信号进行频率调制来应用叠加模式识别信息。

公开(公告)号：US4890316A

公开(公告)日：1989-12-26

申请号：US264792

申请日：1988-10-28

申请人： Dale M. Walsh ,  Clifford H. Wallach

发明人： Dale M. Walsh ,  Clifford H. Wallach

IPC分类号： H04L5/14 ,  H04M11/06

CPC分类号： H04L5/143 ,  H04M11/06

摘要： A modem for connecting data terminal equipment (DTE) to a remote DTE via a the general switched telephone network or leased lines at data rates of 300, 1200 and 2400 bps using standard modulation techniques, and additionally providing virtual full duplex transmission capability at 9600 bps using trellis code modulation (TCM). The high-speed 9600 bps path is implemented by asymmetrical frequency division of the available bandwidth into a high speed, wideband forward channel (9600 bps) and a low speed, narrowband backchannel (300 bps). The high speed transmitting channel is assigned to that modem having the greatest data demand and the direction is dynamically reversed whenever the amount of data awaiting transmission over the low speed channel exceeds a predetermined maximum backlog, provided that a direction reversal has not taken place for at least a specified minimum interval during which use of the forward channel is guaranteed. The transmission speed of the high speed channel is adaptively adjusted in response to changes in the quality of the data link provided by the dial up telephone facility. Cyclic redundancy checking is used to monitor error rates and failed retraining attempts are also used to indicate the need for lower transmission speeds. The trellis decoding algorithm generates a metric value which is used during high speed transmission to indicate when a speed up should be attempted, and the equalization eyescatter signal is used for the same purpose when transmission is taking place at 4800 baud when trellis coding is not used. Rate change requests are sent over the low speed backchannel to the high speed channel which then executes a mandatory speed switch.

摘要翻译： 一种调制解调器，用于使用标准调制技术，通过一般交换电话网络或租用线路将数据终端设备（DTE）连接到数据速率为300,1200和2400bps，并提供9600bps的虚拟全双工传输能力 采用网格码调制（TCM）。 高速9600bps路由通过可用带宽的不对称分频实现为高速，宽带正向信道（9600bps）和低速窄带反向信道（300bps）。 高速发送信道被分配给具有最大数据需求的调制解调器，并且只要等待低速信道传输的数据量超过预定的最大积压，则方向被动态地反转，只要方向反向没有发生在 至少指定的最小间隔，在此期间保证使用前向通道。 响应于由拨号电话设备提供的数据链路的质量的变化，自适应地调整高速信道的传输速度。 循环冗余检查用于监视错误率，并且再次尝试失败也用于指示需要更低的传输速度。 网格解码算法产生在高速传输期间使用的度量值，以指示何时应尝试加速，并且当不使用网格编码时在4800波特发生传输时，均衡eyecatter信号用于相同目的 。 速率更改请求通过低速反向通道发送到高速通道，然后执行强制速度开关。