Method for producing and recovering a data stream for a DMT transceiver
    11.
    发明授权
    Method for producing and recovering a data stream for a DMT transceiver 失效
    用于产生和恢复DMT收发器的数据流的方法

    公开(公告)号:US5619505A

    公开(公告)日:1997-04-08

    申请号:US378697

    申请日:1995-01-26

    CPC classification number: H04L27/2608

    Abstract: A data stream provided to a DMT transmitter (114) is altered to produce an ordered data stream. The ordered data stream is produced by storing the data stream using a first addressing scheme, and then reading the data using a second addressing scheme. The ordered data stream is then converted in to a DMT symbol which is transmitted to a DMT receiver (112). The DMT receiver (112), using the first and second addressing schemes, recovers the ordered data stream and then the original data stream.

    Abstract translation: 提供给DMT发射机(114)的数据流被改变以产生有序数据流。 有序数据流通过使用第一寻址方案存储数据流,然后使用第二寻址方案读取数据来产生。 然后将有序数据流转换为发送到DMT接收器(112)的DMT符号。 使用第一和第二寻址方案的DMT接收机(112)恢复有序数据流,然后恢复原始数据流。

    Method and apparatus for a DMT transmitter having a data for matter
coupled directly to a constellation encoder
    13.
    发明授权
    Method and apparatus for a DMT transmitter having a data for matter coupled directly to a constellation encoder 失效
    用于具有直接耦合到星座编码器的物质数据的DMT发射机的方法和装置

    公开(公告)号:US5606577A

    公开(公告)日:1997-02-25

    申请号:US378847

    申请日:1995-01-26

    CPC classification number: H04L27/2602 H04L27/2626

    Abstract: In a communication system that utilizes DMT technology to couple a primary site (102) to a plurality of secondary sites (104-108), the primary site (102) and each of the secondary sites (104-108) includes a DMT transmitter. Such a DMT transmitter includes a discrete multi-tone encoder that receives an ordered data stream and produces an encoded data stream based on bit loading information, and a data formatter operably coupled to the discrete multi-tone encoder, wherein the data formatter receives transmit data entries and produces the ordered data stream based on carrier channel allocation information.

    Abstract translation: 在利用DMT技术将主站点(102)耦合到多个次要站点(104-108)的通信系统中,主站点(102)和每个次站点(104-108)包括DMT发射机。 这种DMT发射机包括离散多音调编码器,其接收有序数据流并基于比特加载信息产生编码数据流,以及可操作地耦合到离散多音调编码器的数据格式化器,其中数据格式器接收发射数据 并根据载波信道分配信息产生有序数据流。

    Method and apparatus for allocating carrier channels
    14.
    发明授权
    Method and apparatus for allocating carrier channels 失效
    用于分配载波信道的方法和装置

    公开(公告)号:US5495483A

    公开(公告)日:1996-02-27

    申请号:US378841

    申请日:1995-01-26

    Abstract: In a communication system that utilizes DMT technology to couple a primary site (102) to a plurality of secondary sites (104-108), carrier channel allocations may be performed as follows. When a call request is received, the primary site (102) determines the number of required bits based on the bandwidth requirements of the call. Next, the primary site (102) determines whether the maximum bit loading of a given carrier channel exceeds the number of required bits. If yes, the primary site allocates a carrier channel having a bit loading that most closely matches the number of required bits. If no, the primary site allocates the carrier channel having the maximum bit loading to the call, then calculates a remaining number of required bits. From here, the primary site repeats the above process until a sufficient number of carrier channels have been allocated to the call.

    Abstract translation: 在利用DMT技术将主站点(102)耦合到多个次要站点(104-108)的通信系统中,可以如下执行载波信道分配。 当接收到呼叫请求时,主站点(102)基于呼叫的带宽要求来确定所需位数。 接下来,主站点(102)确定给定载波信道的最大位负载是否超过所需位数。 如果是,主站点分配具有最接近匹配所需位数的位加载的载波信道。 如果否,主站点将具有最大位负载的载波信道分配给呼叫,然后计算剩余的所需位数。 从这里,主站点重复上述过程,直到足够数量的载波信道被分配给呼叫。

    Method for allocating data and power in a discrete multi-tone communication system
    15.
    发明授权
    Method for allocating data and power in a discrete multi-tone communication system 失效
    在离散多音通信系统中分配数据和功率的方法

    公开(公告)号:US06259746B1

    公开(公告)日:2001-07-10

    申请号:US09007218

    申请日:1998-01-14

    CPC classification number: H04L27/2608

    Abstract: In the present invention, carriers associated with a discrete multi-tone (DMT) communications system (10) are sorted according to bit allocation capacity. The number of bits needed to attain a specified bit rate are then allocated beginning with the carrier having the greatest bit allocation capacity and proceeding toward the carrier having the least bit allocation capacity until all bits to are allocated. Once allocated, the power to any unused bins is reduced. Different subsets of the carriers between line cards can be specified in order to reduce crosstalk between adjacent lines.

    Abstract translation: 在本发明中,根据比特分配容量对与离散多音(DMT)通信系统(10)相关联的载波进行分类。 然后从具有最大位分配容量的载波开始分配达到指定比特率所需的比特数,并且朝向具有最小比特分配容量的载波进行分配,直到所有比特被分配为止。 一旦分配,任何未使用的箱的功率就会降低。 可以指定线路卡之间的载波的不同子集,以减少相邻线路之间的串扰。

    Method and apparatus for reducing peak-to-average requirements in
multi-tone communication circuits
    16.
    发明授权
    Method and apparatus for reducing peak-to-average requirements in multi-tone communication circuits 失效
    用于减少多音通信电路中的峰值与平均要求的方法和装置

    公开(公告)号:US5835536A

    公开(公告)日:1998-11-10

    申请号:US383026

    申请日:1995-02-02

    CPC classification number: H04L27/3411 H04L27/2614 H04L27/2618

    Abstract: A symbol generator (804) generates a time-domain discrete multi-tone symbol (810). A magnitude comparator (812) compares the magnitude of the time-domain discrete multi-tone symbol (810) with a magnitude threshold. When the magnitude of the time-domain discrete multi-tone symbol (810) compares unfavorably to the magnitude threshold, a magnitude adjusting symbol (816) is added to the time-domain discrete multi-tone symbol (810) such that the magnitude of the time-domain discrete multi-tone symbol (810) is reduced, thereby reducing the peak-to-average requirements (PAR).

    Abstract translation: 符号生成器(804)生成时域离散多色调符号(810)。 幅度比较器(812)将时域离散多音调符号(810)的幅度与幅度阈值进行比较。 当时域离散多音调符号(810)的大小与幅度阈值不利地比较时,幅度调整符号(816)被加到时域离散多音调符号(810),使得 降低了时域离散多音调符号(810),从而降低了峰值平均要求(PAR)。

    System and method for interfacing telephony voice signals with a broadband access network
    17.
    发明授权
    System and method for interfacing telephony voice signals with a broadband access network 有权
    将电话语音信号与宽带接入网接口的系统和方法

    公开(公告)号:US06879667B1

    公开(公告)日:2005-04-12

    申请号:US10131121

    申请日:2002-04-23

    CPC classification number: H04M7/125 H04L12/66

    Abstract: A voice gateway (18) in a telecommunications network (1) includes a plurality of telephony port modules (102). Each telephony port module (102) receives telephony voice signals from a public switched telephony network (13). Each telephony port module (102) includes one or more digital signal processors (110) that perform one or more processing functions on the telephony voice signals. A particular telephony port module (102) may receive a telephony voice signal and use its associated digital signal processor (110) to process the received telephony voice signal or transfer the received telephony voice signal for processing to any digital signal processor (110) on any telephony port module (102). Telephony signals may also be transferred for processing to digital signal processors (110) on another voice gateway (18) in a voice gateway system.

    Abstract translation: 电信网络(1)中的语音网关(18)包括多个电话端口模块(102)。 每个电话端口模块(102)从公共交换电话网络(13)接收电话语音信号。 每个电话端口模块(102)包括在电话语音信号上执行一个或多个处理功能的一个或多个数字信号处理器(110)。 特定电话端口模块(102)可以接收电话语音信号并使用其相关联的数字信号处理器(110)来处理所接收的电话语音信号或者将所接收的电话语音信号传送到任何数字信号处理器(110) 电话端口模块(102)。 也可以将电话信号传送到语音网关系统中另一语音网关(18)上的数字信号处理器(110)进行处理。

    Method and apparatus for echo cancellation updates in a multicarrier transceiver system
    19.
    发明授权
    Method and apparatus for echo cancellation updates in a multicarrier transceiver system 有权
    用于多载波收发器系统中的回波消除更新的方法和装置

    公开(公告)号:US06683859B1

    公开(公告)日:2004-01-27

    申请号:US09438619

    申请日:1999-11-12

    CPC classification number: H04B3/23 H04L27/2626 H04L27/2647

    Abstract: An echo canceler (34) includes a summing device (104) that subtracts a correction signal from a received signal, the difference of which represents the far-end signal with an error component. Instead of adapting its coefficients using the output of the summing device (104), the echo canceler (34) uses the difference between the input and output of a decision device (108) as an estimate of the error component alone. The estimate of the error component is then used to adapt the coefficients according to the adaptive least mean squares (LMS) algorithm. In one embodiment, the decision device (108) forms discrete multi-tone symbols based on the equalized output of the summing device. In this embodiment, the echo canceler (34) performs an inverse of the equalization step efficiently by replacing a division operation with a multiply operation and a corresponding power-of-two shift operation.

    Abstract translation: 回波消除器(34)包括从接收信号中减去校正信号的求和装置(104),该差值表示具有误差分量的远端信号。 代替使用求和装置(104)的输出来适配其系数,回波消除器(34)使用决策装置(108)的输入和输出之间的差作为单独的误差分量的估计。 然后使用误差分量的估计来根据自适应最小均方(LMS)算法来适应系数。 在一个实施例中,判决设备(108)基于求和设备的均衡输出来形成离散多音调符号。 在本实施例中,回波消除器(34)通过用乘法运算和相应的二次幂移位运算来代替除法运算来有效地执行均衡步骤的逆。

    Method and apparatus for a DMT receiver having a data de-formatter
coupled directly to a constellation decoder
    20.
    发明授权
    Method and apparatus for a DMT receiver having a data de-formatter coupled directly to a constellation decoder 失效
    具有直接耦合到星座解码器的数据解格式器的DMT接收机的方法和装置

    公开(公告)号:US5539777A

    公开(公告)日:1996-07-23

    申请号:US378431

    申请日:1995-01-26

    CPC classification number: H04L5/023

    Abstract: In a communication system that utilizes DMT technology to couple a primary site (102) to a plurality of secondary sites (104-108), the primary site (102) and each of the secondary sites (104-108) includes a DMT receiver. Such a DMT receiver includes a discrete multi-tone decoder that receives a time domain discrete multi-tone symbol and produces an ordered data stream based on bit loading information and a data de-formatter, operably coupled to the discrete multi-tone decoder, wherein the data de-formatter receives the ordered data stream and produces a recovered data stream based on carrier channel allocation information.

    Abstract translation: 在利用DMT技术将主站点(102)耦合到多个次要站点(104-108)的通信系统中,主站点(102)和每个次站点(104-108)包括DMT接收机。 这种DMT接收机包括离散多音调解码器,其接收时域离散多音调符号,并且基于比特加载信息产生有序数据流,并且可操作地耦合到离散多音调解码器的数据解格式器,其中 数据解码器接收有序数据流,并且基于载波信道分配信息产生恢复的数据流。

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