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41 records (took 0.022 seconds)

    35.
    发明专利
    未知

    公开(公告)号：IT1179389B

    公开(公告)日：1987-09-16

    申请号：IT4852284

    申请日：1984-07-06

    Applicant: MOTOROLA INC

    Inventor： KNEISEL THOMAS FREDERICK ,  BALZANO QUIRINO ,  FREEBURG THOMAS ARTHUR

    IPC: H01Q1/24 ,  H04B1/38 ,  H04B7/08 ,  H01Q

    Abstract: An adaptable homotropic antenna system for use with a portable communication transceiver is described. The antenna system can be used for reception or transmission and can be completely enclosed within the portable transceiver housing. The homotropic antenna system evaluates the quality of a received signal and if the signal is below a predetermined threshold level, an alternate antenna will be selected. The antenna system will continue to sample the available antennas until an antenna produces a signal of acceptable quality.

    36.
    发明专利
    未知

    公开(公告)号：IT1168619B

    公开(公告)日：1987-05-20

    申请号：IT4875083

    申请日：1983-07-26

    Applicant: MOTOROLA INC

    Inventor： BURKE TIMOTHY MARK ,  NOBLE SCOTT WILLIAM ,  FREEBURG THOMAS ARTHUR ,  KREBS JAY ROBERT

    IPC: H04B1/10 ,  H04B7/26 ,  H04M7/04 ,  H04W88/02 ,  H04B

    Abstract: A data signalling system for transmitting signals between at least one primary station and a plurality of secondary stations. The system is well adapted for use in multiple unit radio communications systems capable of noise and data communications. A register model is utilized which permits a highly flexible signalling system compatable with a wide range of communications networks. Data transfer is accomplished using fixed length data packets which are error correction encoded and transmitted utilizing PSK modulation.

    39.
    发明专利
    未知

    公开(公告)号：DK170484D0

    公开(公告)日：1984-03-28

    申请号：DK170484

    申请日：1984-03-28

    Applicant: MOTOROLA INC

    Inventor： BURKE TIMOTHY MARK ,  FREEBURG THOMAS ARTHUR ,  KREBS JAY ROBERT ,  NOBLE SCOTT WILLIAM

    IPC: H04B1/10 ,  H04B7/26 ,  H04M7/04 ,  H04W88/02

    Abstract: A data signalling system for transmitting signals between at least one primary station and a plurality of secondary stations. The system is well adapted for use in multiple unit radio communications systems capable of noise and data communications. A register model is utilized which permits a highly flexible signalling system compatable with a wide range of communications networks. Data transfer is accomplished using fixed length data packets which are error correction encoded and transmitted utilizing PSK modulation.

    COMMUNICATIONS SYSTEM
    40.
    发明专利
    COMMUNICATIONS SYSTEM 未知

    公开(公告)号：AU2903477A

    公开(公告)日：1979-03-29

    申请号：AU2903477

    申请日：1977-09-22

    Applicant: MOTOROLA INC

    Inventor： FREEBURG THOMAS ARTHUR ,  JOGLEKAR MANOHAR ACHYUT ,  PAJAKOWSKI LAWRENCE RICHARD

    IPC: E06B9/04 ,  H04B1/50 ,  H04B7/15 ,  H04B7/26

    Abstract: In a control circuitry for a two-way mobile radio voice/data shared communications system including a plurality of mobile stations with data and voice terminals, a base station, a dispatching station for voice and data, a voice/data processor interposed between the voice/data dispatching station and the base station, there is provided means for enabling transmission and reception of inbound and outbound voice and digital data signals between the base station and the mobile stations selectively to effect full-duplex voice/data shared communications.

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