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    DSL modem apparatus and initialization method for DSL communication
    1.
    发明授权
    DSL modem apparatus and initialization method for DSL communication 失效
    DSL调制解调器装置和DSL通信的初始化方法

    公开(公告)号：US07200169B2

    公开(公告)日：2007-04-03

    申请号：US10404072

    申请日：2003-04-02

    申请人： Takashi Suzuki ,  Motoyoshi Nagai

    发明人： Takashi Suzuki ,  Motoyoshi Nagai

    IPC分类号： H04B1/38 ,  H04L5/16

    CPC分类号： H04L1/0065 ,  H04L1/0071 ,  H04L5/1438 ,  H04L27/2626 ,  H04L27/2662

    摘要： An ADSL modem apparatus including an IFFT unit that performs an inverse fast Fourier transform on transmission data, an FFT unit that performs a fast Fourier transform on reception data, and a processor that performs an initialization sequence according to a protocol, is provided. During the initialization sequence, the processor maintains and enables an interleave memory to be employed. After data transmission is initiated, the processor instructs a switch controller so that an interleave unit and de-interleave unit can use the interleave memory.

    摘要翻译： 一种ADSL调制解调装置，包括对发送数据进行快速傅立叶逆变换的IFFT单元，对接收数据进行快速傅里叶变换的FFT单元，以及根据协议进行初始化的处理单元。 在初始化序列期间，处理器维护和使能交织存储器。 在数据发送开始之后，处理器指示交换控制器，使得交错单元和去交织单元可以使用交织存储器。

    DSL modem apparatus and communication control method
    2.
    发明申请
    DSL modem apparatus and communication control method 审中-公开
    DSL调制解调器装置和通信控制方法

    公开(公告)号：US20050041730A1

    公开(公告)日：2005-02-24

    申请号：US10781690

    申请日：2004-02-20

    申请人： Nobuhiko Noma ,  Genzo Takagi ,  Motoyoshi Nagai ,  Mitsuhiro Araki ,  Akira Atsuta

    发明人： Nobuhiko Noma ,  Genzo Takagi ,  Motoyoshi Nagai ,  Mitsuhiro Araki ,  Akira Atsuta

    IPC分类号： H04J11/00 ,  H04B1/38 ,  H04B3/04 ,  H04L5/14 ,  H04L25/03 ,  H04L27/00 ,  H04L27/26 ,  H04L27/36

    CPC分类号： H04L5/14 ,  H04L27/2626 ,  H04L27/2657

    摘要： A processor executes an initialization sequence that exchanges predetermined signals prior to data communication. A complex operation circuit multiplies transmission data of a sub-carrier by gain compensation data and phase angle compensation data, which are prepared for the same sub-carrier. Therefore, modulation is done so that the multiplication results are simultaneously transmitted, by an IFFT unit, in a plurality of sub-carriers. In addition, the transmission data of a sub-carrier, during the data communication, is multiplied by gain compensation data and phase angle compensation data, which are prepared for the same sub-carrier.

    摘要翻译： 处理器执行在数据通信之前交换预定信号的初始化序列。 复合运算电路通过对同一子载波准备的增益补偿数据和相位角补偿数据来乘以副载波的发送数据。 因此，进行调制，使得乘法结果由IFFT单元在多个子载波中同时发送。 此外，在数据通信期间，子载波的发送数据被乘以为同一子载波准备的增益补偿数据和相位角补偿数据。

    ADSL modem apparatus and ADSL modem communication method
    3.
    发明申请
    ADSL modem apparatus and ADSL modem communication method 审中-公开
    ADSL调制解调器装置和ADSL调制解调器通信方式

    公开(公告)号：US20050031027A1

    公开(公告)日：2005-02-10

    申请号：US10781698

    申请日：2004-02-20

    申请人： Nobuhiko Noma ,  Genzo Takagi ,  Motoyoshi Nagai ,  Mitsuhiro Araki ,  Akira Atsuta

    发明人： Nobuhiko Noma ,  Genzo Takagi ,  Motoyoshi Nagai ,  Mitsuhiro Araki ,  Akira Atsuta

    IPC分类号： H04J11/00 ,  H04B1/38 ,  H04L12/16 ,  H04L29/10 ,  H04M11/06

    CPC分类号： H04M11/062

    摘要： An ADSL modem apparatus is provided that accurately obtains a communication distance to an opposing ADSL modem apparatus, and that enables ADSL communication in an area exceeding the communication distance conventionally used. In the ADSL modem apparatus, a transmitter-receiver transmits and receives a carrier specified by a communication standard in a handshake procedure, and a processor estimates a communication distance to an opposing ADSL modem apparatus in accordance with a reception level of the carrier.

    摘要翻译： 提供了一种ADSL调制解调器装置，其准确地获得与对方ADSL调制解调器装置的通信距离，并且能够在超过通常使用的通信距离的区域中进行ADSL通信。 在ADSL调制解调器装置中，发送接收器在握手过程中发送和接收由通信标准指定的载波，并且处理器根据载波的接收电平估计到相对的ADSL调制解调设备的通信距离。

    ADSL modem apparatus and communication method thereof
    4.
    发明申请
    ADSL modem apparatus and communication method thereof 审中-公开
    ADSL调制解调装置及其通信方法

    公开(公告)号：US20050025227A1

    公开(公告)日：2005-02-03

    申请号：US10772309

    申请日：2004-02-06

    申请人： Nobuhiko Noma ,  Genzo Takagi ,  Motoyoshi Nagai ,  Mitsuhiro Araki

    发明人： Nobuhiko Noma ,  Genzo Takagi ,  Motoyoshi Nagai ,  Mitsuhiro Araki

    IPC分类号： H04J11/00 ,  H04B1/38 ,  H04L5/16 ,  H04L12/20 ,  H04M3/00 ,  H04M11/00 ,  H04M11/06

    CPC分类号： H04M11/062

    摘要： A processor of a transceiver estimates a communication distance to an opposing ADSL modem apparatus by detecting a reception level of a communication distance detecting signal in accordance during an initialization sequence with the ITU-T regulated G.992. 1 or G. 992.2. The communication distance detecting signal is used to detect a communication distance to an opposing ADSL modem apparatus and has comb-shaped frequency characteristics. Based on the estimated communication distance, and by referring to a table showing attenuation of signal energy (stored in a RAM), the signal energy in a high frequency band (among the signal energy assigned to transmitting signals) is concentrated into a low frequency band during the communication.

    摘要翻译： 收发器的处理器通过根据ITU-T规定的G.992的初始化序列检测通信距离检测信号的接收电平来估计到相对ADSL调制解调器装置的通信距离。 1或G. 992.2。 通信距离检测信号用于检测与对方ADSL调制解调装置的通信距离，并具有梳状频率特性。 基于估计的通信距离，通过参照表示存储在RAM中的信号能量衰减的表（高频带中的信号能量（分配给发送信号的信号能量）中的信号能量集中在低频带 在沟通过程中

    DSL modem apparatus and communication control method
    6.
    发明申请
    DSL modem apparatus and communication control method 审中-公开
    DSL调制解调器装置和通信控制方法

    公开(公告)号：US20050036540A1

    公开(公告)日：2005-02-17

    申请号：US10781694

    申请日：2004-02-20

    申请人： Nobuhiko Noma ,  Genzo Takagi ,  Motoyoshi Nagai ,  Mitsuhiro Araki ,  Akira Atsuta

    发明人： Nobuhiko Noma ,  Genzo Takagi ,  Motoyoshi Nagai ,  Mitsuhiro Araki ,  Akira Atsuta

    IPC分类号： H04J11/00 ,  H04B1/38 ,  H04L5/02 ,  H04L5/14 ,  H04L7/02 ,  H04L29/08 ,  H04M11/06

    CPC分类号： H04L5/023 ,  H04L5/1469 ,  H04M11/06

    摘要： The present invention provides a communication control method between DSL modem apparatuses mutually connected via a metallic cable. One of the DSL modem apparatuses transmits transmission data using a plurality of sub-carriers simultaneously, while the other DSL modem apparatus decodes the transmission data in the plurality of sub-carriers. The both sides of DSL modem apparatuses exchange data signals by mutually synchronizing and alternatively sharing transmission timeslots and reception timeslots, using the same range of sub-carriers. In addition, the upstream (data transmission from a remote side to a center side) uses the same range of carrier indexes that are used in the downstream (data transmission from the center side to the remote side).

    摘要翻译： 本发明提供了经由金属电缆相互连接的DSL调制解调装置之间的通信控制方法。 DSL调制解调装置之一同时使用多个副载波发送发送数据，而另一个DSL调制解调装置解码多个子载波中的发送数据。 DSL调制解调设备的两侧通过使用相同范围的子载波互相同步并交替地共享传输时隙和接收时隙来交换数据信号。 此外，上游（从远程侧到中心侧的数据传输）使用与下游使用的相同的载波索引范围（从中心侧到远端的数据传输）。