公开(公告)号：US06792040B1

公开(公告)日：2004-09-14

申请号：US09430678

申请日：1999-10-29

Applicant: Gordon Taylor Davis ,  Ajay Dholakia ,  Fredy D. Neeser ,  Malcolm Scott Ware ,  Hua Ye

Inventor： Gordon Taylor Davis ,  Ajay Dholakia ,  Fredy D. Neeser ,  Malcolm Scott Ware ,  Hua Ye

IPC: H04L516

CPC classification number: H04M11/06 ,  H03G3/3036 ,  H04L5/1438 ,  H04L25/03063

Abstract: Modems, methods, and computer program products provide a dual power mode capability in which a maximum power limit is determined for a received signal and, based on that determination, at least one modem operational parameter is adjusted and/or digital impairment learning (DIL) sequence is selected. Adjustments made to the operational parameters may allow a modem to operate in a high power mode to achieve a higher downstream data rate. The higher downstream data rate may be attributed to an improved SNR resulting from an increase in data transmission power. Moreover, the modem may also operate in a normal power mode where the operational parameters may be set to maximize the client modem receiver's dynamic range. By selecting the DIL sequence based on the power limit, a DIL signal containing symbols having power levels within the power limit may be selected.

Abstract translation: 调制解调器，方法和计算机程序产品提供双功率模式能力，其中为接收到的信号确定最大功率限制，并且基于该确定，调整至少一个调制解调器操作参数和/或数字损伤学习（DIL） 选择序列。 对操作参数进行的调整可允许调制解调器以高功率模式工作，以实现更高的下行数据速率。 较高的下行数据速率可能归因于由于数据传输功率的增加而导致的改善的SNR。 此外，调制解调器还可以以正常功率模式操作，其中可以设置操作参数以最大化客户端调制解调器接收机的动态范围。 通过基于功率限制选择DIL序列，可以选择包含具有功率限制内的功率电平的符号的DIL信号。

公开(公告)号：US06775320B1

公开(公告)日：2004-08-10

申请号：US09663001

申请日：2000-09-15

Applicant: Marcos C. Tzannes ,  Michael A. Tzannes ,  David C. Hunter ,  Richard W. Gross ,  Halil Padir

Inventor： Marcos C. Tzannes ,  Michael A. Tzannes ,  David C. Hunter ,  Richard W. Gross ,  Halil Padir

IPC: H04L516

CPC classification number: H04L47/803 ,  H04B1/38 ,  H04L1/0018 ,  H04L1/0025 ,  H04L1/0057 ,  H04L1/007 ,  H04L1/0071 ,  H04L1/0075 ,  H04L5/0007 ,  H04L5/0042 ,  H04L5/0053 ,  H04L5/0064 ,  H04L5/008 ,  H04L5/0087 ,  H04L5/0096 ,  H04L25/4915 ,  H04L27/2608 ,  H04L47/10 ,  H04L47/18 ,  H04L47/263 ,  H04L47/826 ,  H04L47/828 ,  H04M11/062

Abstract: A transceiver and method for communicating over a communications channel having a plurality of subchannels are described. In particular, the transceiver is capable of dynamically switching between communicating data for a first active application set and communicating data for a second different active application set. An active application set is defined as the set of one or more active applications for which the transceiver is currently communicating data. As part of communicating data for the first active application set, the transceiver allocates the subchannels to the one or more applications in the first application set. The transmission requirements of the first active application set defines a first communication state of the transceiver. When the transceiver dynamically transitions to communicating data for the second different application set, the transceiver reallocates the subchannels to the one or more applications in the second different application set. The transmission requirements of the second different active application set defines a second communication state of the transceiver.

Abstract translation: 描述了一种用于通过具有多个子信道的通信信道进行通信的收发器和方法。 特别地，收发器能够在用于第一活动应用集的通信数据和用于第二不同活动应用集的通信数据之间动态切换。 活动应用集被定义为收发器正在向其传送数据的一个或多个活动应用的集合。 作为用于传送第一活动应用集的数据的一部分，收发器将子信道分配给第一应用集中的一个或多个应用。 第一活动应用集合的传输要求定义了收发信机的第一通信状态。 当收发机动态地转换到用于第二不同应用集的通信数据时，收发器将子信道重新分配给第二不同应用集中的一个或多个应用。 第二不同活动应用集合的传输要求定义了收发信机的第二通信状态。

公开(公告)号：US06768770B1

公开(公告)日：2004-07-27

申请号：US09556487

申请日：2000-04-21

Applicant: Georg Lipperer ,  Peter Sehrig ,  Josef Schmal

Inventor： Georg Lipperer ,  Peter Sehrig ,  Josef Schmal

IPC: H04L516

CPC classification number: H04B1/44

Abstract: A transceiver has bidirectional internal interface lines which can be connected to a baseband circuit. The transceiver is switchable by the baseband circuit between a transmission mode and a reception mode. The internal interface lines are connected to at least one quadrature modulator which in the transmission mode is connected to the interface lines, and to a quadrature demodulator which in the reception mode is connected to the interface lines. In the alternative, the demodulator is set to high impedance in the transmission mode and the modulator is set to high impedance in the reception mode.

Abstract translation: 收发器具有可连接到基带电路的双向内部接口线路。 收发器可以由传输模式和接收模式之间的基带电路切换。 内部接口线连接到至少一个正交调制器，其在传输模式下连接到接口线，并连接到正交解调器，其在接收模式下连接到接口线。 或者，在发送模式下将解调器设置为高阻抗，并且在接收模式下将调制器设置为高阻抗。

公开(公告)号：US06687286B1

公开(公告)日：2004-02-03

申请号：US09465683

申请日：1999-12-17

Applicant: Robert Henry Leonowich ,  Ayal Shoval

Inventor： Robert Henry Leonowich ,  Ayal Shoval

IPC: H04L516

CPC classification number: H04L25/4904 ,  H04L25/4917

Abstract: A single, 10/100 twisted-pair driver for Ethernet and Fast Ethernet applications designed in a 0.25 &mgr;m, 3.3V, digital CMOS process is described. The combined driver sources either 10 Mbaud Manchester data or 125 Mbaud MLT3/NRZI data. In 10 Mbaud mode the driver incorporates programmable features such as an additional common-mode current for various linearity performance as function of power supply dissipation. In 125 Mbaud mode of operation, the driver can be configured for different duty cycle distortion and for various rise and fall-times as a trade-off in EMI performance and remote receiver cable length performance. As well, rise/fall-time asymmetry performance is programmable as a trade-off in supply power dissipation. The driver can be run optimally during a transition and sub-optimally when sending multiple “0” symbols to save power. These power dissipation numbers can be reduced through programmable modes when more relaxed performance targets are acceptable.

Abstract translation: 描述了一个用于以0.25mum，3.3V，数字CMOS工艺设计的以太网和快速以太网应用的10/100双绞线驱动器。 组合的驾驶员可以获得10 Mbaud Manchester数据或125 Mbaud MLT3 / NRZI数据。 在10 Mbaud模式下，驱动器集成了可编程功能，例如额外的共模电流，可作为电源功耗的各种线性性能。 在125 Mbaud工作模式下，驱动器可以配置为不同的占空比失真和各种上升和下降时间作为EMI性能和远程接收器电缆长度性能的折衷。 此外，上升/下降时间不对称性能可编程为供电功耗的折衷。 驱动程序可以在转换期间最佳运行，并且在发送多个“0”符号以节省电力时，可以非常优化。 当更宽松的性能目标可以接受时，这些功耗数字可以通过可编程模式降低。

公开(公告)号：US06636560B1

公开(公告)日：2003-10-21

申请号：US09234570

申请日：1999-01-20

Applicant: Alan Gatherer

Inventor： Alan Gatherer

IPC: H04L516

CPC classification number: H04L25/497

Abstract: The operation of a line card in the local exchange of a point-to-point switched telephone network is modified to increase the data rate of voiceband modem transmission by increasing the sampling rate and providing controlled intersymbol interference using partial response techniques.

Abstract translation: 修改点对点交换电话网络的本地交换中的线路卡的操作，以通过增加采样率并使用部分响应技术提供受控的符号间干扰来提高语音频带调制解调器传输的数据速率。

公开(公告)号：US06556545B1

公开(公告)日：2003-04-29

申请号：US09468522

申请日：1999-12-21

Applicant: Ronald D. Boesch

Inventor： Ronald D. Boesch

IPC: H04L516

CPC classification number: H04B1/403

Abstract: An RF full-duplex communication device operates in a selected range of channels spaced by a selected increment. A transmitter and a receiver are connected to a duplex filter for simultaneously transmitting and receiving signals. A low frequency offset channel stepper is adapted to selectively shift frequency either the designated duplex spacing or offset therefrom. A high frequency channel stepper is connected to the transmitter and selectively connected to the receiver either directly or through the low frequency offset channel stepper, where the high frequency channel stepper is adapted to selectively shift frequency in steps substantially equal to the selected increment. A controller is adapted to (a) selectively connect the high frequency channel stepper directly to the receiver when the device is in a camping mode not transmitting a signal, (b) selectively connect the high frequency channel stepper to the receiver through the low frequency offset channel stepper and cause the low frequency offset channel stepper to shift frequency the normal duplex spacing when the device is in a normal communicating mode, and (c) selectively connect the high frequency channel stepper to the receiver through the low frequency offset channel stepper and cause the low frequency offset channel stepper to shift frequency on the incrementally spaced grid when the device is in a slotted communicating mode. The controller controls a switch for connecting or disconnecting the low frequency offset channel stepper from the receiver.

Abstract translation: RF全双工通信设备在所选择的增量间隔的选定范围内操作。 发射机和接收机连接到双工滤波器，用于同时发送和接收信号。 低频偏移通道步进器适于选择性地将频率移动到指定的双工间隔或偏移。 高频信道步进器连接到发射机并且直接或通过低频偏移信道步进器选择性地连接到接收机，其中高频信道步进器适于选择性地基本上等于所选择的增量的频率移位频率。 控制器适于（a）当设备处于不发送信号的野营模式时，选择性地将高频信道步进器连接到接收机，（b）通过低频偏移选择性地将高频信道步进器连接到接收机 并且当设备处于正常通信模式时，使低频偏移信道步进器将频率移动到正常的双工间隔，并且（c）通过低频偏移信道步进器选择性地将高频信道步进器连接到接收机，并且导致 低频偏移通道步进器，以便当设备处于时隙通信模式时在逐渐间隔的格栅上移动频率。 控制器控制用于从接收器连接或断开低频偏移通道步进器的开关。

公开(公告)号：US06553063B1

公开(公告)日：2003-04-22

申请号：US09430466

申请日：1999-10-29

Applicant: Thuji Simon Lin ,  Steven Jaffe ,  Robindra Joshi

Inventor： Thuji Simon Lin ,  Steven Jaffe ,  Robindra Joshi

IPC: H04L516

CPC classification number: H04L25/03178 ,  H04L1/0003 ,  H04L25/03184 ,  H04L27/34

Abstract: A device of dynamic communication of information allows, on the average, non-integer bits per symbol transmission, using a compact code set or a partial response decoding receiver. A stream of k or k+1 data bits is grouped into bit vectors which then are mapped onto corresponding signal constellations forming transmission symbols. Two or more symbols can be grouped and further encoded, so that a symbol is spread across the two or more symbols being communicated. Sequence estimation using, for example, maximum likelihood techniques, as informed by noise estimates relative to the received signal. Each branch metric in computing the path metric of a considered sequence at the receiver is weighted by the inverse of the noise power. It is desirable that the constellation selection, sequence estimation and noise estimation be performed continuously and dynamically.

Abstract translation: 使用紧凑代码集或部分响应解码接收器的信息的动态通信装置平均允许每个符号传输的非整数比特。 将k或k + 1个数据比特流分组成比特向量，然后映射到形成传输符号的相应的信号星座上。 可以对两个或更多个符号进行分组和进一步编码，使得符号分布在所传送的两个或更多个符号之间。 使用例如最大似然技术的序列估计，通过相对于接收信号的噪声估计来通知。 在接收机处计算所考虑的序列的路径度量的每个分支度量被噪声功率的倒数加权。 期望连续动态地执行星座选择，序列估计和噪声估计。

公开(公告)号：US06445729B1

公开(公告)日：2002-09-03

申请号：US09222379

申请日：1998-12-29

Applicant: Keun-Mo Kang

Inventor： Keun-Mo Kang

IPC: H04L516

CPC classification number: H04B1/38 ,  H03G1/0088 ,  H04B1/707

Abstract: A transceiver apparatus in a code division multiple access system is disclosed. The apparatus includes a low noise amplifier for amplifying a signal received via an antenna, a first filter for extracting components of a usable band from the amplified signal, and a voltage controlled amplifier for amplifying the filtered. A down mixer converts the amplified signal to an intermediate frequency, a second filter eliminates unnecessary waves generated during the conversion operation of the down mixer, and an automatic gain controlled amplifier amplifies the signal filtered by the second filter. A demodulator demodulates the signal amplified by the automatic gain controlled amplifier, and a control unit receives the demodulated signal, and determines the degree of amplification of each amplifier based on the power level of the received signal, and outputs control signals respectively adapted to determine the degree of amplification and whether or not an amplification should be conducted in a drive amplifier, based on the power level of the received signal.

Abstract translation: 公开了一种码分多址系统中的收发器装置。 该装置包括用于放大经由天线接收的信号的低噪声放大器，用于从放大信号中提取可用频带的分量的第一滤波器和用于放大经滤波的电压控制放大器。 降压混频器将放大的信号转换为中频，第二滤波器消除在下混频器的转换操作期间产生的不必要的波，并且自动增益控制放大器放大由第二滤波器滤波的信号。 解调器解调由自动增益控制放大器放大的信号，并且控制单元接收解调信号，并且基于接收信号的功率电平确定每个放大器的放大程度，并且输出分别适于确定 基于接收信号的功率电平，放大度以及是否应在驱动放大器中进行放大。

公开(公告)号：US06263016B1

公开(公告)日：2001-07-17

申请号：US09018771

申请日：1998-02-04

Applicant: Donald Morgan Bellenger ,  Richard Guy Carrington Williams

Inventor： Donald Morgan Bellenger ,  Richard Guy Carrington Williams

IPC: H04L516

CPC classification number: H04L47/263 ,  H04L5/1438 ,  H04L47/10 ,  H04L47/11 ,  Y02D50/10

Abstract: The current invention provides methods for relieving congestion associated with interfacing multiple types of subscriber link traffic, i.e. voice, voice-band data, and broad-band data, with a network such as the public switched telephone network (PSTN). In an embodiment of the invention waste of modem resources is diminished by reducing the magnitude of the transmission parameters between a data terminal and modem resources during intervals of reduced data flow. This frees scarce modem resources for other sessions. In another embodiment of the invention the time required to initiate session setup is reduced. This reduces the time devoted by modem facilities to call setup at the start of session, or after an idle period.

Abstract translation: 本发明提供了用于与诸如公共交换电话网（PSTN）的网络与多种类型的用户链路业务即语音，语音频带数据和宽带数据进行接口相关联的减轻拥塞的方法。 在本发明的一个实施例中，通过在减少的数据流的间隔期间减少数据终端和调制解调器资源之间的传输参数的大小来减少调制解调器资源的浪费。 这为其他会话释放了稀缺的调制解调器资源。 在本发明的另一个实施例中，启动会话建立所需的时间减少。 这减少了调制解调器设施在会话开始时或空闲时段之后拨打设置的时间。

公开(公告)号：US06240128B1

公开(公告)日：2001-05-29

申请号：US09096425

申请日：1998-06-11

Applicant: Raja Banerjea ,  Bahman Barazesh ,  Yhean-Sen Lai ,  Kannan Rajamani

Inventor： Raja Banerjea ,  Bahman Barazesh ,  Yhean-Sen Lai ,  Kannan Rajamani

IPC: H04L516

CPC classification number: H04B3/23 ,  H04L5/16

Abstract: A so-called post equalization echo canceler is utilized in conjunction with transmitter and receiver data timing synchronization to enhance tracking of the echo path impulse response and convergence of the transversal filter in the post equalization echo canceler. This is realized by employing the equalization error in the receiver to adapt coefficients of the post equalization echo canceler transversal filter, in conjunction, with the transmitter and receiver data timing synchronization. The timing synchronization is realized by using sample rate conversion of the transmit sample rate to the receive sample rate and, in one example, variable phase interpolation of the converted timing signal. The receiver timing is recovered, and a phase error signal generated by the timing recovery unit is advantageously employed to adjust a variable phase interpolator in the receiver and a variable phase interpolator in a path supplying the transmitter signal to an input of the post equalization echo canceler. This insures that both the adaptive transversal filter of the post equalization echo canceler and a transversal filter in an equalizer in the receiver are operating on data having the same timing. In this example, the timing is that of the received data signal. In an embodiment of the invention, the post equalization echo canceler is utilized in conjunction with a so-called conventional, e.g., a primary, echo canceler. The conventional echo canceler is employed before the equalizer to cancel a major portion of any echo signal, while the post equalization echo canceler is employed after the equalizer to cancel residual echo signals caused primarily by drift in the hybrid network. To this end, the conventional echo canceler is “trained” during the initial half-duplex operation of the modem and, then, updating of its impulse response is inhibited, while the post equalization echo canceler is allowed to continue adapting.

Abstract translation: 所谓后置均衡回波消除器与发射机和接收机数据定时同步结合使用，以增强跟踪均衡回波消除器中的回波路径脉冲响应和横向滤波器的收敛。 这通过在接收机中采用均衡误差来实现，以使后均衡回波消除器横向滤波器的系数与发射机和接收机的数据定时同步相结合。 通过使用发送采样率的采样率转换为接收采样率，并且在一个示例中，转换的定时信号的可变相位插值来实现定时同步。 接收器定时被恢复，并且有利地采用由定时恢复单元产生的相位误差信号来调整接收机中的可变相位内插器和将发射机信号提供给后均衡回波消除器的输入的路径中的可变相位内插器 。 这确保后均衡回波消除器的自适应横向滤波器和接收机中的均衡器中的横向滤波器对具有相同定时的数据进行操作。 在该示例中，定时是所接收的数据信号的时序。 在本发明的一个实施例中，后均衡回波消除器与所谓常规的，例如主回波消除器结合使用。 在均衡器之前采用传统的回波消除器来消除任何回波信号的主要部分，而在均衡器之后采用后均衡回波消除器来消除主要由混合网络中的漂移引起的残余回波信号。 为此，传统的回波消除器在调制解调器的初始半双工操作期间被“训练”，然后，抑制其脉冲响应的更新，同时允许后均衡回波消除器继续适配。