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    System for, and method of, transmitting and receiving through telephone lines signals representing data
    1.
    发明授权
    System for, and method of, transmitting and receiving through telephone lines signals representing data 失效
    通过电话线发送和接收表示数据的信号的系统和方法

    公开(公告)号：US5627885A

    公开(公告)日：1997-05-06

    申请号：US195628

    申请日：1994-02-14

    申请人： Eric Paneth ,  Mordechai Segal ,  Boaz Rippin ,  Ehud H. Rokach

    发明人： Eric Paneth ,  Mordechai Segal ,  Boaz Rippin ,  Ehud H. Rokach

    IPC分类号： H03H21/00 ,  H04B3/23 ,  H04L7/04 ,  H04L7/06 ,  H04L7/10 ,  H04L25/00 ,  H04L25/03 ,  H04L25/48 ,  H04M11/00

    CPC分类号： H04L25/00 ,  H04B3/23 ,  H04L25/03057 ,  H04L25/03866 ,  H04L7/043 ,  H04L7/06 ,  H04L7/10

    摘要： Analog signals representing individual digital values (.+-.1, .+-.3) pass through a telephone line to a receiver. These signals may be first provided in a pseudo random sequence. A linear echo canceller and a first adder eliminate, to an extent, echo signals resulting from second analog signals transmitted on the same telephone line by the receiver. A non-linear echo canceller and a second adder further reduce the echo signals and specifically reduce non-linear components in the echo signals. Adjustable signal delays achieve optimal performance of the linear and non-linear echo cancellers. An equalizer containing four (4) different modules then compensates for signal distortions introduced by the telephone line and minimizes the effect of noise in the telephone line. The equalizer modules are a digital gain control element, a feed forward digital filter and two (2) feedback digital filters. A detector module produces in one of several different ways at the receiver an estimate of the digital data (.+-.1, .+-.3) transmitted at the other end of the telephone line. The detector either extracts the digital information based on peaks in the received (non-equalized) signal or by adding the equalized signals with preset threshold values. A scrambler-descrambler module locally generates a replica of the digital symbols transmitted in analog form at the other end of the telephone line, based on a limited number (e.g. 23) of correctly detected digital values. The scrambler-descrambler module may also operate as a descrambler to recover data scrambled by the transmitter at the other end.

    摘要翻译： 表示各个数字值（+/- 1，+/- 3）的模拟信号通过电话线路传送到接收器。 这些信号可以首先以伪随机序列提供。 线性回波消除器和第一加法器在一定程度上消除由接收器在相同电话线上发送的第二模拟信号产生的回波信号。 非线性回波消除器和第二加法器进一步减少回波信号并且具体地减少回波信号中的非线性分量。 可调节的信号延迟实现了线性和非线性回波消除器的最佳性能。 包含四（4）个不同模块的均衡器然后补偿由电话线引入的信号失真，并最大限度地减少电话线路中噪声的影响。 均衡器模块是数字增益控制元件，前馈数字滤波器和两（2）个反馈数字滤波器。 检测器模块在接收机处以几种不同的方式之一产生在电话线的另一端传输的数字数据（+/- 1，+/- 3）的估计。 检测器根据接收（非均衡）信号中的峰值提取数字信息，或通过将均衡信号与预设阈值相加。 扰码解扰器模块基于有限数量（例如23个）正确检测的数字值本地生成在电话线的另一端以模拟形式传输的数字符号的副本。 加扰器解扰器模块还可以作为解扰器来操作，以恢复另一端由发射机加扰的数据。

    System for, and method of, transmitting and receiving through telephone lines signals representing data
    2.
    发明授权
    System for, and method of, transmitting and receiving through telephone lines signals representing data 失效
    通过电话线发送和接收表示数据的信号的系统和方法

    公开(公告)号：US5778055A

    公开(公告)日：1998-07-07

    申请号：US717248

    申请日：1996-09-20

    申请人： Eric Paneth ,  Mordechai Segal ,  Boaz Rippin ,  Ehud H. Rokach

    发明人： Eric Paneth ,  Mordechai Segal ,  Boaz Rippin ,  Ehud H. Rokach

    IPC分类号： H03H21/00 ,  H04B3/23 ,  H04L7/04 ,  H04L7/06 ,  H04L7/10 ,  H04L25/00 ,  H04L25/03 ,  H04L25/48 ,  H04M11/00

    CPC分类号： H04L25/00 ,  H04B3/23 ,  H04L25/03057 ,  H04L25/03866 ,  H04L7/043 ,  H04L7/06 ,  H04L7/10

    摘要： Analog signals representing individual digital values (.+-.1, .+-.3) pass through a telephone line to a receiver. These signals may be first provided in a pseudo random sequence. A linear echo canceller and a first adder eliminate, to an extent, echo signals resulting from second analog signals transmitted on the same telephone line by the receiver. A non-linear echo canceller and a second adder further reduce the echo signals and specifically reduce non-linear components in the echo signals. Adjustable signal delays achieve optimal performance of the linear and non-linear echo cancellers. An equalizer containing four (4) different modules then compensates for signal distortions introduced by the telephone line and minimizes the effect of noise in the telephone line. The equalizer modules are a digital gain control element, a feed forward digital filter and two (2) feedback digital filters. A detector module produces in one of several different ways at the receiver an estimate of the digital data (.+-.1, .+-.3) transmitted at the other end of the telephone line. The detector either extracts the digital information based on peaks in the received (non-equalized) signal or by adding the equalized signals with preset threshold values. A scrambler-descrambler module locally generates a replica of the digital symbols transmitted in analog form at the other end of the telephone line, based on a limited number (e.g. 23) of correctly detected digital values. The scrambler-descrambler module may also operate as a descrambler to recover data scrambled by the transmitter at the other end.

    摘要翻译： 表示各个数字值（+/- 1，+/- 3）的模拟信号通过电话线路传送到接收器。 这些信号可以首先以伪随机序列提供。 线性回波消除器和第一加法器在一定程度上消除由接收器在相同电话线上发送的第二模拟信号产生的回波信号。 非线性回波消除器和第二加法器进一步减少回波信号并且具体地减少回波信号中的非线性分量。 可调节的信号延迟实现了线性和非线性回波消除器的最佳性能。 包含四（4）个不同模块的均衡器然后补偿由电话线引入的信号失真，并最大限度地减少电话线路中噪声的影响。 均衡器模块是数字增益控制元件，前馈数字滤波器和两（2）个反馈数字滤波器。 检测器模块在接收机处以几种不同的方式之一产生在电话线的另一端传输的数字数据（+/- 1，+/- 3）的估计。 检测器根据接收（非均衡）信号中的峰值提取数字信息，或通过将均衡信号与预设阈值相加。 扰码解扰器模块基于有限数量（例如23个）正确检测的数字值本地生成在电话线的另一端以模拟形式传输的数字符号的副本。 加扰器解扰器模块还可以作为解扰器来操作，以恢复另一端由发射机加扰的数据。

    Bi-directional chaining of network access ports
    3.
    发明授权
    Bi-directional chaining of network access ports 有权
    网络接入端口的双向链接

    公开(公告)号：US06680904B1

    公开(公告)日：2004-01-20

    申请号：US09472683

    申请日：1999-12-27

    申请人： Menachem Kaplan ,  David Zelig ,  Roy Kinamon ,  Eli Aloni ,  Ron Sdayoor ,  Eric Paneth ,  Eli Magal

    发明人： Menachem Kaplan ,  David Zelig ,  Roy Kinamon ,  Eli Aloni ,  Ron Sdayoor ,  Eric Paneth ,  Eli Magal

    IPC分类号： G01R3108

    CPC分类号： H04L49/3081 ,  H04L12/56 ,  H04L2012/5603 ,  H04L2012/5614 ,  H04L2012/5627 ,  H04Q11/0478

    摘要： Network access apparatus includes first and second master units, each having a physical interface to a packet-switched network. A plurality of slave units, each slave unit having one or more ports to respective subscriber lines, are linked by a plurality of physical interface lines in one or more daisy chains, in which the slave units are mutually connected in series by the physical interface lines therebetween. Each daisy chain includes at least a first slave unit connected by one of the physical interface lines to the first master unit and a last slave unit connected by another of the physical interface lines to the second master unit.

    摘要翻译： 网络接入设备包括第一和第二主单元，每个具有到分组交换网络的物理接口。 多个从单元，具有一个或多个端口到相应用户线的每个从单元由一个或多个菊花链中的多个物理接口线链接，其中从单元通过物理接口线串联连接 之间。 每个菊花链包括至少一个第一从单元，其通过物理接口线之一连接到第一主单元，以及由另一物理接口线连接到第二主单元的最后一个从单元。

    Digital signals and frequency correction in a digital wireless system
    8.
    发明授权
    Digital signals and frequency correction in a digital wireless system 失效
    数字信号和数字无线系统中的频率校正

    公开(公告)号：US4893317A

    公开(公告)日：1990-01-09

    申请号：US256415

    申请日：1988-10-12

    申请人： David N. Critchlow ,  Graham M. Avis ,  Sandra J. Earlam ,  Karle J. Johnson ,  Bruce A. Smetana ,  Gregory L. Westling ,  Eric Paneth ,  Moshe Yehushua

    发明人： David N. Critchlow ,  Graham M. Avis ,  Sandra J. Earlam ,  Karle J. Johnson ,  Bruce A. Smetana ,  Gregory L. Westling ,  Eric Paneth ,  Moshe Yehushua

    IPC分类号： H04B7/26 ,  H03D3/00 ,  H03D7/16 ,  H03H17/06 ,  H03L7/095 ,  H04B1/38 ,  H04B1/50 ,  H04B7/005 ,  H04L27/152 ,  H04L27/18 ,  H04L27/22 ,  H04L27/233 ,  H04M1/00 ,  H04M1/253 ,  H04M1/725 ,  H04M11/06 ,  H04Q7/20 ,  H04Q7/38

    CPC分类号： H04M1/72502 ,  H03D3/006 ,  H03D7/165 ,  H03H17/0657 ,  H03L7/095 ,  H04B1/50 ,  H04L27/1525 ,  H04L27/2338 ,  H03D2200/005 ,  H03D2200/0052 ,  H03D2200/0058 ,  H03D2200/0062 ,  H03D2200/0082 ,  H03D3/007 ,  H03D7/161

    摘要： A digital wireless subscriber telephone unit for wireless connection with a base station. The subscriber unit has a baseband processor which is coupled to storage device for the baseband functions. The baseband processor is direct access coupled to a modem processor whereby the two processors may communicate with each other. The modem processor generally acts as the master in the system, although lock-out circuit may be used in certain circumstances. The signal from the modem processor is converted to an analog signal, which is subjected to deglitching, and the deglitched signal is then upconverted and filtered to form an IF signal which is thereafter amplified. The amplified IF signal is combined with a signal generated by a synthesizer to provide an RF signal. On the basis of certain signals received from the base station, the baseband processor produces initiating signals which determine whether the subscriber unit will be in the transmit mode or the receive mode. In intervals between actuation of the system, a training mode is used wherein a known signal from the modem processor is compared with a looped-back signal to produce correction constants to compensate for undesirable variations in the IF, these constants being stored for use in correcting actual received signals. During demodulation, the modulated digital signals are fed to the modem processor in the form of time multiplexed I and Q samples and are demultiplexed. The demultiplexed I and Q samples are fed to an equalizer and frequency correction circuit for minimization of errors and for production of a frequency correction signal which is used to correct any errors in the timing of the system and in the output of the synthesizer. 2

    摘要翻译： 一种用于与基站无线连接的数字无线用户电话单元。 用户单元具有耦合到用于基带功能的存储设备的基带处理器。 基带处理器是与调制解调器处理器相连的直接访问器，由此两个处理器可以彼此进行通信。 调制解调器处理器通常用作系统中的主机，尽管在某些情况下可以使用锁定电路。 来自调制解调器处理器的信号被转换成模拟信号，该模拟信号经过去抖动，然后将去抖动信号上变频和滤波，以形成IF信号，此后被放大。 放大的IF信号与由合成器产生的信号组合以提供RF信号。 基于从基站接收到的某些信号，基带处理器产生确定用户单元是处于发送模式还是接收模式的启动信号。 在系统的启动之间的间隔中，使用训练模式，其中将来自调制解调器处理器的已知信号与环回信号进行比较以产生校正常数以补偿IF中的不期望的变化，这些常数被存储用于校正 实际接收信号。 在解调期间，经调制的数字信号以时分复用I和Q采样的形式馈送到调制解调处理器，并被解复用。 解复用的I和Q采样被馈送到均衡器和频率校正电路，用于最小化误差并产生用于校正系统的定时和合成器的输出中的任何误差的频率校正信号。

    Modem for RF subscriber telephone system
    9.
    发明授权
    Modem for RF subscriber telephone system 失效
    RF用户电话系统调制解调器

    公开(公告)号：US4644561A

    公开(公告)日：1987-02-17

    申请号：US713923

    申请日：1985-03-20

    申请人： Eric Paneth ,  David N. Critchlow ,  Moshe Yehushua

    发明人： Eric Paneth ,  David N. Critchlow ,  Moshe Yehushua

    IPC分类号： H03D7/00 ,  A63B31/00 ,  H04L27/18 ,  H04L27/20 ,  H04L27/22 ,  H04L27/227

    CPC分类号： H04L27/2273 ,  H04L27/2032

    摘要： A modem including a modulator section for converting a bit stream, wherein each given number of successive bits defines a symbol, into a phase modulated intermediate frequency (IF) signal, the symbols in the modulator section being phase modulated and then digitally filtered to provide a filtered signal that, when converted into an analog signal, provides a modulation signal of a frequency that is centered about a predetermined frequency and deviates therefrom in accordance with the value of the phase modulated symbol, the analog signal then being filtered and passed to a mixer for up conversion to an IF signal; and a demodulator section for converting the IF signal into a bit stream, the demodulator section including a microprocessor which not only filters received digital signals but contains a memory for storing filter coefficients for use in the filtering of received digital signals; the modem being also operable in a training mode wherein a sequence of predetermined symbols is provided to the filter in the modulator section and the resultant phase modulated IF signal is receivable in the demodulator section, the microprocessor acting to adjust the filter coefficients stored in its memory until the reconstructed phase modulated symbols correspond to the sequence of predetermined symbols provided to the filter in the modulator section.

    摘要翻译： 一种调制解调器，包括用于将位流中的每个给定数量的连续比特定义为符号的调制器部分转换成相位调制中频（IF）信号，调制器部分中的符号被相位调制，然后进行数字滤波，以提供 滤波后的信号，当转换为模拟信号时，提供以预定频率为中心的频率的调制信号，并根据相位调制符号的值偏移，然后将模拟信号滤波并传送到混频器 用于转换成IF信号; 以及解调器部分，用于将IF信号转换成比特流，解调器部分包括微处理器，其不仅对接收到的数字信号进行滤波，而且包含用于存储用于接收的数字信号的滤波的滤波器系数的存储器; 调制解调器还可以在训练模式中操作，其中向调制器部分中的滤波器提供一系列预定符号，并且所得到的相位调制IF信号可接收在解调器部分中，微处理器用于调整存储在其存储器中的滤波器系数 直到重构的相位调制符号对应于在调制器部分中提供给滤波器的预定符号的序列。