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29 records (took 0.021 seconds)

    1.
    发明专利
    未知

    公开(公告)号：DE69029914T2

    公开(公告)日：1997-08-21

    申请号：DE69029914

    申请日：1990-05-14

    Applicant: MOTOROLA INC

    Inventor： EYUBOGLU VEDAT M ,  DONG PING

    IPC: G01R23/16 ,  G01R29/26 ,  H04B3/10 ,  H04L1/20 ,  H04L27/00 ,  H04L27/38 ,  H04L29/08 ,  H04L25/38

    Abstract: A modem receives data sent from a remote device over a communication channel by using a single carrier modulated signal. The modem includes a receiver which receives the modulated signal and a line probing signal sent by the remote device over the channel. The receiver is capable of receiving the modulated signal over any one of a plurality of frequency bands. A line probing processor measures characteristics of the channel based upon the received line probing signal. A selector selects one of the plurality of frequency bands, this selection being based upon the measured characteristics of the channel. The selected frequency band is to be used for receiving the modulated signal from the remote device.

    System and device for,and method of,detecting,characterizing, and mitigating deterministic distortion in a communications network
    3.
    发明专利
    System and device for,and method of,detecting,characterizing, and mitigating deterministic distortion in a communications network 未知

    公开(公告)号：GB2333662B

    公开(公告)日：2001-07-04

    申请号：GB9907894

    申请日：1997-10-15

    Applicant: MOTOROLA INC

    Inventor： EYUBOGLU VEDAT M ,  BARABELL ARTHUR J ,  HUMBLET PIERRE A

    IPC: H04M1/24 ,  H04J3/12 ,  H04L25/03 ,  H04L25/49 ,  H04B15/00 ,  H04L1/20 ,  H04L12/26 ,  H04L27/00 ,  H04L27/28 ,  H04M3/08 ,  H04M3/22

    Abstract: A system and device for, and method of, detecting, characterizing, and mitigating deterministic distortion in a communication system. An exemplary communication system includes a digital adaptor for sending octets on to a backbone of a PSTN, which then sends, and potentially distorts the octets, received by a line interface. The line interface converts the octets to baseband signals received by an analog adaptor. Several mechanisms and methods are described in which the analog and digital adaptor cooperate to detect the presence of distortion, in particular, robbed bit signaling, on the communication system. The characterization may then be used to mitigate the effects of the distortion. Several receive constellations are provided, each constructed in view of the transmit constellation and in view of the manner in which the deterministic distortion will distort signals transmitted over the system. The receive constellations differ from the transmit constellation. The analog adaptor uses an appropriate receive constellation based on the type of distortion expected at a given interval. The digital adaptor may similarly include several constellation in view of the same considerations.

    Modem
    6.
    发明专利
    Modem 未知

    公开(公告)号：HK1004586A1

    公开(公告)日：1998-11-27

    申请号：HK98103606

    申请日：1998-04-28

    Applicant: MOTOROLA INC

    Inventor： EYUBOGLU VEDAT M ,  DONG PING

    IPC: G01R23/16 ,  G01R29/26 ,  H04B3/10 ,  H04L1/20 ,  H04L27/00 ,  H04L27/38 ,  H04L29/08 ,  H04L

    Abstract: A modem receives data sent from a remote device over a communication channel by using a single carrier modulated signal. The modem includes a receiver which receives the modulated signal and a line probing signal sent by the remote device over the channel. The receiver is capable of receiving the modulated signal over any one of a plurality of frequency bands. A line probing processor measures characteristics of the channel based upon the received line probing signal. A selector selects one of the plurality of frequency bands, this selection being based upon the measured characteristics of the channel. The selected frequency band is to be used for receiving the modulated signal from the remote device.

    Modem
    7.
    发明专利
    Modem 未知

    公开(公告)号：GR3023410T3

    公开(公告)日：1997-08-29

    申请号：GR970401065

    申请日：1997-05-12

    Applicant: MOTOROLA INC

    Inventor： EYUBOGLU VEDAT M ,  DONG PING

    IPC: G01R23/16 ,  G01R29/26 ,  H04B3/10 ,  H04L1/20 ,  H04L27/00 ,  H04L27/38 ,  H04L29/08 ,  H04L25/38

    Abstract: A modem receives data sent from a remote device over a communication channel by using a single carrier modulated signal. The modem includes a receiver which receives the modulated signal and a line probing signal sent by the remote device over the channel. The receiver is capable of receiving the modulated signal over any one of a plurality of frequency bands. A line probing processor measures characteristics of the channel based upon the received line probing signal. A selector selects one of the plurality of frequency bands, this selection being based upon the measured characteristics of the channel. The selected frequency band is to be used for receiving the modulated signal from the remote device.

    8.
    发明专利
    未知

    公开(公告)号：DE69029914D1

    公开(公告)日：1997-03-27

    申请号：DE69029914

    申请日：1990-05-14

    Applicant: MOTOROLA INC

    Inventor： EYUBOGLU VEDAT M ,  DONG PING

    IPC: G01R23/16 ,  G01R29/26 ,  H04B3/10 ,  H04L1/20 ,  H04L27/00 ,  H04L27/38 ,  H04L29/08 ,  H04L25/38

    Abstract: A modem receives data sent from a remote device over a communication channel by using a single carrier modulated signal. The modem includes a receiver which receives the modulated signal and a line probing signal sent by the remote device over the channel. The receiver is capable of receiving the modulated signal over any one of a plurality of frequency bands. A line probing processor measures characteristics of the channel based upon the received line probing signal. A selector selects one of the plurality of frequency bands, this selection being based upon the measured characteristics of the channel. The selected frequency band is to be used for receiving the modulated signal from the remote device.

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