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    • 1. 发明授权
    • Controlled simultaneous analog and digital communication
    • 同时控制的模拟和数字通信
    • US5537441A
    • 1996-07-16
    • US67519
    • 1993-06-14
    • Gordon BremerJoseph Q. ChapmanP. Michael HendersonKurt E. HolmquistKenneth D. KoRichard K. Smith
    • Gordon BremerJoseph Q. ChapmanP. Michael HendersonKurt E. HolmquistKenneth D. KoRichard K. Smith
    • H04J7/00H04L27/34H04L5/12
    • H04J7/00H04L27/3483
    • A method and apparatus for control of concurrent communication of analog information and digital information. In general terms, when the communication channel is viewed as a multi-dimensional space, the digital information signal is divided into symbols, and the symbols are mapped onto the signal space with a preset distance between them. The analog signal, generally limited in magnitude to less than half the distance separating the symbols, is converted to component signals and added (i.e., vector addition) to the symbols. The sum signal is then transmitted to the receiver where the symbols are detected and subtracted from the received signal to yield the analog signal components. The transmitted analog signal is recreated from those components. Both half-duplex and full-duplex operation is available in accordance with this invention. The illustrative embodiment includes a controller that is sensitive to input signals applied to the modem disclosed herein. To wit, the control is sensitive to signals from the analog port, signals from the digital port, and signals from the port that carries the combined digital and analog signals. Operation of the near-end modem is controlled as well as operation of the far-end modem.
    • 一种用于控制模拟信息和数字信息的并发通信的方法和装置。 一般来说,当通信信道被视为多维空间时,数字信息信号被划分为符号,并且符号以它们之间的预定距离映射到信号空间。 通常将模拟信号限制为小于分隔符号的距离的一半,被转换成分量信号并且相加(即矢量相加)到符号。 然后将和信号发送到接收机,其中检测符号并从接收信号中减去符号以产生模拟信号分量。 传输的模拟信号从这些组件重新创建。 根据本发明,半双工和全双工操作都可用。 说明性实施例包括对施加到本文公开的调制解调器的输入信号敏感的控制器。 就是说,这个控制对来自模拟端口的信号,来自数字端口的信号以及来自端口的信号都是敏感的,这些信号带有组合的数字和模拟信号。 近端调制解调器的操作受到远端调制解调器的操作和控制。
    • 5. 发明授权
    • Digital subscriber line service over loaded loops
    • 数字用户线服务负载循环
    • US07289610B2
    • 2007-10-30
    • US10435219
    • 2003-05-08
    • Gordon BremerWilliam L. BettsEdward A. ThoenesJoseph Q. Chapman
    • Gordon BremerWilliam L. BettsEdward A. ThoenesJoseph Q. Chapman
    • H04M11/00
    • H04L12/66H04L5/16
    • The preferred embodiments of the present invention generally provide improved communications over a subscriber loop that is loaded with at least one and potentially a plurality of load coils. The preferred embodiments of the present invention will work over loaded subscriber loops that also support a native POTS interface as well as over loaded subscriber loops that are not providing a native POTS interface. Furthermore, although the preferred embodiments of the present invention are intended to address the technical and business problems of service providers delivering digital subscriber line service over loaded loops, the preferred embodiments will also work over unloaded loops. Various duplexing strategies such as, but not limited to, time-division duplexing (TDD), adaptive time-division duplexing (ATDD), four-wire duplexing, and/or extended performance echo cancelled duplexing (EP ECD) provide improved performance on loaded loops that generally offer significant signal attenuation at frequencies above 4 KHz. In addition, such duplexing strategies can start and stop quickly enough to pass various POTS interface signaling generally without creating a significant adverse effect on DSL data communications.
    • 本发明的优选实施例通常提供加载有至少一个并且潜在地多个负载线圈的用户环路的改进的通信。 本发明的优选实施例可以用于也支持本地POTS接口的负载用户环路以及不提供本机POTS接口的过载用户环路。 此外,尽管本发明的优选实施例旨在解决在负载环路上提供数字用户线服务的服务提供商的技术和业务问题,但优选实施例也将在无负载环路上工作。 诸如但不限于时分双工(TDD),自适应时分双工(ATDD),四线双工和/或扩展性能回波消除双工(EP ECD)的各种双工策略在加载 通常在高于4KHz的频率下提供有效信号衰减的环路。 此外,这种双工策略可以快速启动和停止,足以通过各种POTS接口信令,而不会对DSL数据通信产生显着的不利影响。