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    53.
    发明专利
    未知

    公开(公告)号：DE19681280C2

    公开(公告)日：1998-09-17

    申请号：DE19681280

    申请日：1996-12-21

    Applicant: MOTOROLA INC

    Inventor： BURKE TIMOTHY M

    IPC: H04L7/033 ,  H04L27/06 ,  H04L7/00 ,  H03D1/00

    Abstract: A control unit (102) efficiently decodes burst signal transmissions in a TDMA-based telecommunication system (100) by decimating down the number of samples requiring processing during symbol detection. The control unit (102) includes a sampling receiver (304) that inputs burst signals from cable access units, converts them to a pair of baseband quadrature signals, I and Q. The sampling receiver (304) also includes an A/D converter (314) that samples the I and Q signals at preferably four times the symbol rate. A digital signal processor circuit (306) produces a timing error signal for substantially all of the samples. The digital processor circuit (306) also accumulates a timing error sum for each of the four samples. The processor circuit (306) selects the optimum sample as the sample between the samples having the largest positive and negative error sums. The processor circuit (306) also includes a pi /4-DQPSK differential detector that processes the optimum sample of each symbol for symbol detection.

    54.
    发明专利
    未知

    公开(公告)号：DE19802226A1

    公开(公告)日：1998-08-13

    申请号：DE19802226

    申请日：1998-01-22

    Applicant: MOTOROLA INC

    Inventor： NEWLIN DOUGLAS J ,  BURKE TIMOTHY M

    IPC: H04N7/14 ,  H04N7/173 ,  H04N7/15

    Abstract: An apparatus (300, 400) and method are provided for multimedia communications, such as for video conferencing. One of the embodiments of the apparatus for multimedia input and control (300) includes a video input (310) to produce an input video signal; an audio input (320) to produce an input audio signal; a radio frequency modulator (350); a data/control input (330) to produce an input data signal; and a processor arrangement (360) responsive when operably coupled, through a set of program instructions, to produce a first processor signal to the radio frequency modulator to combine the input video signal with the input audio signal to form a composite audio/video signal, and the processor arrangement (360) further responsive to modulate the input data signal to form a modulated input data signal and produce a second processor signal to the radio frequency modulator to combine the input video signal with the modulated input data signal to form a combined video/data signal.

    56.
    发明专利
    未知

    公开(公告)号：ID19626A

    公开(公告)日：1998-07-23

    申请号：ID972465

    申请日：1997-07-16

    Applicant: MOTOROLA INC

    Inventor： BURKE TIMOTHY M ,  STEINBRENNER KURT ,  MANNETTE MICHAEL R

    IPC: H04L1/22 ,  H04M3/12 ,  G06F15/80

    Abstract: A telephony system having automatic timing adjustment for diverse routing of HFC systems has a signal stream routing through a signal line loop between a head-end and at least one communication unit. If a fault occurs within the signal line loop, recognized by the head-end when a short uplink burst from the communication unit does not align within a predetermined timing window, the head-end will cycle through predetermined delay parameters corresponding to various alternate signal line loops made up of redundant signal lines. Once the predetermined delay parameter corresponding to the current alternate signal line loop is determined, normal operation of the system resumes.

    58.
    发明专利
    未知

    公开(公告)号：DE19731476A1

    公开(公告)日：1998-02-05

    申请号：DE19731476

    申请日：1997-07-22

    Applicant: MOTOROLA INC

    Inventor： BURKE TIMOTHY M ,  STEINBRENNER KURT ,  MANNETTE MICHAEL

    IPC: H04L1/22 ,  H04M3/12 ,  H04M3/18

    Abstract: A telephony system having automatic timing adjustment for diverse routing of HFC systems has a signal stream routing through a signal line loop (140) between a head-end (120) and at least one communication unit (152). If a fault occurs within the signal line loop (140), recognized by the head-end (120) when a short uplink burst from the communication unit (152) does not align within a predetermined timing window, the head-end (120) will cycle through predetermined delay parameters corresponding to various alternate signal line loops made up of redundant signal lines (146, 148). Once the predetermined delay parameter corresponding to the current alternate signal line loop is determined, normal operation of the system resumes.

    Método y sistema para controlar el acceso a un canal
    60.
    发明专利
    Método y sistema para controlar el acceso a un canal 未知

    公开(公告)号：AR000272A1

    公开(公告)日：1997-06-18

    申请号：AR33448295

    申请日：1995-12-01

    Applicant: MOTOROLA INC

    Inventor： MEDENDORP DALE F ,  BURKE TIMOTHY M ,  VILMUR PAUL L ,  CORRIGAN RICHARD

    IPC: H04L12/28 ,  H04M11/00 ,  H04M19/08 ,  H04N7/10 ,  H04N7/16 ,  H04B3/44 ,  H04M19/00 ,  H04M11/06

    Abstract: La presente invención proporciona un método y un aparato para controlar el consumo de la energía y el acceso a los canales telefónicos (36) en en sistematelefónico por cable (10). El sistema (10) tiene dos subsistemas para limitar la alimentacióny el acceso: uno, cuando un teléfono (40) espera para recibiruna llamada, y un segundo subsistema cuando un abonado desea establecer una llamada. El teléfono (40) usualmente está en espera para recibir una llamadatelefónica. El primer subsistemareduce el consumo de energía por medio de un transceptor (114) y para el teléfono (40) que monitorea las llamadas entrantesen forma periódica y apaga el transceptor (114) cuando no las monitorea. El segundo subsistema limita el consumo de energía del sistema, y el acceso a loscanales (36) por medio de admitir sólo la corriente de retorno y el acceso a los canales (36) cuando un canal (36) se halla disponible para el uso. Estosdos subsistemas reducen el consumo de la alimentación del sistema y regulan el acceso a los canales telefónicos (36).

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