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    METHOD AND APPARATUS FOR SWITCHED DIVERSITY RECEPTION OF A RADIO SIGNAL
    42.
    发明专利
    METHOD AND APPARATUS FOR SWITCHED DIVERSITY RECEPTION OF A RADIO SIGNAL 未知

    公开(公告)号：HUT71649A

    公开(公告)日：1996-01-29

    申请号：HU9501746

    申请日：1993-12-06

    Applicant: MOTOROLA INC

    Inventor： SIWIAK KAZIMIERZ ,  SCHWENDEMAN ROBERT JOHN ,  BREEDEN ROBERT LOUIS

    IPC: H04B7/08

    Abstract: A method and apparatus in a data communication receiver (100) for diversity reception of a radio signal including a predictably repetitive, predetermined data bit pattern (304) comprises a processor (114) controlling (600) an antenna switch (106) to select between a first antenna feed (102) and a second antenna feed (104) as a momentary source of the radio signal during transmissions of the predetermined data bit pattern (304). The radio signal received from the momentary source is monitored by a data receiver (110) during the transmission of the predetermined bit pattern (304) to derive the data therefrom, and at least one bit error count is determined (604, 610) by the processor (114). After completion of the predetermined bit pattern (304), an antenna feed (102, 104) for the radio signal is selected (616, 620) in response to the at least one bit error count.

    MULTIPLE SUBCHANNEL FLEXIBLE PROTOCOL METHOD AND APPARATUS
    44.
    发明专利
    MULTIPLE SUBCHANNEL FLEXIBLE PROTOCOL METHOD AND APPARATUS 未知

    公开(公告)号：CA2189150A1

    公开(公告)日：1995-11-09

    申请号：CA2189150

    申请日：1995-05-01

    Applicant: MOTOROLA INC

    Inventor： SCHWENDEMAN ROBERT JOHN ,  MOORE MORRIS

    IPC: H04W88/18 ,  H04Q7/08 ,  H04Q7/16

    Abstract: A communication system (100) broadcasting over a plurality of subchannels comprises a resource controller unit (204) having at least one of the plurality of subchannels serving as a control channel for addressing subscribers and directing them to receive messages or data on a set or a subset of the plurality of the subchannels, input means (240) for sending messages to the resource controller unit, and a selective call receiver (106) addressable by the resource controller unit, capable of receiving messages as directed by the resource controller on any of the subchannels and time slots directed by the resource controller.

    SELECTIVE CALL SIGNALLING SYSTEM
    45.
    发明专利
    SELECTIVE CALL SIGNALLING SYSTEM 未知

    公开(公告)号：CA2060513C

    公开(公告)日：1995-10-10

    申请号：CA2060513

    申请日：1990-07-13

    Applicant: MOTOROLA INC

    Inventor： DELUCA MICHAEL JOSEPH ,  SNOWDEN GREGORY OLON ,  SCHWENDEMAN ROBERT JOHN ,  JASINSKI LEON

    IPC: G08B7/00 ,  G08B5/22 ,  H04W88/18 ,  H04B1/16

    Abstract: A paging system has a signal for transmitting a variable amount of messages to paging receivers. The signal has a synchronization signal (100), an address field (104), an information and a boundary signal indicative of the boundary between the address field and the information field. Each message has an address which is included within the address field and may have message information which is included in the information field. The information field includes two portions, a first portion (106) having a plurality of packets for holding a predetermined amount of information and a second portion (108) for holding a variable amount of information. If the message information is greater than the predetermined amount, it is stored in the second portion of information field and a vector signal indicating the location of the message information is stored in the first information field.

    48.
    发明专利
    未知

    公开(公告)号：DK123991A

    公开(公告)日：1991-06-25

    申请号：DK123991

    申请日：1991-06-25

    Applicant: MOTOROLA INC

    Inventor： KUZNICKI WILLIAM JOSEPH ,  SCHWENDEMAN ROBERT JOHN

    IPC: H04B7/005 ,  H04J3/06 ,  H04L25/24 ,  H04W52/42 ,  H04W88/18 ,  H04B1/00 ,  H04L29/02 ,  H04J15/00

    Abstract: A transmitter, having controllable transmission functions is described for transmitting coded message signals to a plurality of portable communications receivers, the coded message signals including and message information interleaved with transmitter control signals synchornized with the message information. The transmitter includes a receiving section for receiving the coded message signals from an input source for transmission. A decoder which couples to the receiving section decodes the synchronized transmitter control signals to derive transmission control signals. A transmitter section, responsive to the transmission control signals, transmits the coded message signals. Additional transmission control signals may also be derived from one or more receiver control signals embedded in the coded message signals.

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