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    71.
    发明专利
    未知

    公开(公告)号：ES2058207T3

    公开(公告)日：1994-11-01

    申请号：ES88117269

    申请日：1988-10-17

    Applicant: MOTOROLA INC

    Inventor： LABEDZ GERALD PAUL ,  BORTH DAVID EDWARD

    IPC: H04B7/005 ,  H04B7/01 ,  H04L27/38 ,  H04B7/26 ,  H04B7/185

    Abstract: The method and apparatus for rapid phase acquisition and random radio channel phase error compensation for a TDMA QPSK receiver is disclosed. Received quadrature signals having a known synchronizing sequence transmitted on one of the vectors is correlated to a local replica of the sequence. The output correlation detection signals are held for the duration of the TDMA timeslot and multiplied by the received quadrature signals to produce two pairs of products. The mutually exclusive product pairs are summed to recover data having the random phase error compensated.

    72.
    发明专利
    未知

    公开(公告)号：DE3851208D1

    公开(公告)日：1994-09-29

    申请号：DE3851208

    申请日：1988-10-17

    Applicant: MOTOROLA INC

    Inventor： LABEDZ GERALD PAUL ,  BORTH DAVID EDWARD

    IPC: H04L27/38 ,  H04B7/005 ,  H04B7/01 ,  H04B7/26 ,  H04B7/185

    Abstract: The method and apparatus for rapid phase acquisition and random radio channel phase error compensation for a TDMA QPSK receiver is disclosed. Received quadrature signals having a known synchronizing sequence transmitted on one of the vectors is correlated to a local replica of the sequence. The output correlation detection signals are held for the duration of the TDMA timeslot and multiplied by the received quadrature signals to produce two pairs of products. The mutually exclusive product pairs are summed to recover data having the random phase error compensated.

    76.
    发明专利
    未知

    公开(公告)号：DK101791A

    公开(公告)日：1991-06-25

    申请号：DK101791

    申请日：1991-05-28

    Applicant: MOTOROLA INC

    Inventor： DETTRO GREGORY J ,  LABEDZ GERALD PAUL ,  ATKINSON FREDERICK G

    IPC: H04J3/00 ,  H01J3/02 ,  H01J3/14 ,  H03G3/20 ,  H04J3/10 ,  H04J3/14 ,  H04J3/02 ,  H04L27/12

    Abstract: In a communications system having transmissions containing certain information-of-interest (147, 149) at predetermined intervals in the transmission, there is provided a method for isolating and processing that information-of-interest. The method is characterized by sensing the start of a transmission (141) and isolating for processing as the information-of-interest, the information received about instant(s) predeterminally removed in time (145) from the sensed start of transmission (141). Thus, the information-of-interest is isolated principally on the basis of elapsed time. The method for isolating and processing that information-of-interest is further characterized by sensing (249) the start of a transmission from the received signal power of the transmission exceeding a predetermined threshold (259); AGCing the transmission (233) and attenuating the AGC'd transmission from a maximum level to a desired level before the information-of-interest is expected to arrive; isolating for processing as the information-of-interest, the information received about instant(s) predeterminally removed in time from the sensed start of transmission, by timing (263) the expected interval between the instant that the start of the transmission is sensed and the predetermined instant that the information-in-interest should arrive (whereby the information-of-interest is isolated principally on the basis of elapsed time); tagging the information (247) isolated about that instant for processing; and beginning processing (275) with information just preceeding the isolated information (whereby the reliability of the information detection is enhanced by one-to-several bits).

    77.
    发明专利
    未知

    公开(公告)号：DK101791D0

    公开(公告)日：1991-05-28

    申请号：DK101791

    申请日：1991-05-28

    Applicant: MOTOROLA INC

    Inventor： DETTRO GREGORY J ,  LABEDZ GERALD PAUL ,  ATKINSON FREDERICK G

    IPC: H04J3/00 ,  H01J3/02 ,  H01J3/14 ,  H03G3/20 ,  H04J3/10 ,  H04J3/14 ,  H04J3/02 ,  H04L27/12

    Abstract: In a communications system having transmissions containing certain information-of-interest (147, 149) at predetermined intervals in the transmission, there is provided a method for isolating and processing that information-of-interest. The method is characterized by sensing the start of a transmission (141) and isolating for processing as the information-of-interest, the information received about instant(s) predeterminally removed in time (145) from the sensed start of transmission (141). Thus, the information-of-interest is isolated principally on the basis of elapsed time. The method for isolating and processing that information-of-interest is further characterized by sensing (249) the start of a transmission from the received signal power of the transmission exceeding a predetermined threshold (259); AGCing the transmission (233) and attenuating the AGC'd transmission from a maximum level to a desired level before the information-of-interest is expected to arrive; isolating for processing as the information-of-interest, the information received about instant(s) predeterminally removed in time from the sensed start of transmission, by timing (263) the expected interval between the instant that the start of the transmission is sensed and the predetermined instant that the information-in-interest should arrive (whereby the information-of-interest is isolated principally on the basis of elapsed time); tagging the information (247) isolated about that instant for processing; and beginning processing (275) with information just preceeding the isolated information (whereby the reliability of the information detection is enhanced by one-to-several bits).

    78.
    发明专利
    未知

    公开(公告)号：MX151011A

    公开(公告)日：1984-09-06

    申请号：MX18590481

    申请日：1981-02-10

    Applicant: MOTOROLA INC

    Inventor： LABEDZ GERALD PAUL

    IPC: H03H17/00 ,  G06F17/10 ,  G06F17/15 ,  H03D3/00 ,  H03G3/00 ,  H04W88/02 ,  H04H1/06

    Abstract: Method and apparatus for sampling input signals of different frequencies and providing a detect signal when the input frequency has a predetermined value suitable for use as a tone decoder for continuous tone controlled squelch systems. The method utilizes digital pseudo continuous correlation tone detection, and includes sample matrix limiting to provide rapid reverse burst turnoff, as well as background detection to avoid adjacent channel reverse burst turnoff falsing.

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