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34 records (took 0.023 seconds)

    1.
    发明专利
    未知

    公开(公告)号：SE520753C2

    公开(公告)日：2003-08-19

    申请号：SE9702784

    申请日：1997-07-23

    Applicant: MOTOROLA INC

    Inventor： KURBY CHRISTOPHER NEIL

    IPC: G01S1/00 ,  G01S19/06 ,  G01S19/14 ,  G01S19/25 ,  H04B7/185 ,  G01S5/14

    Abstract: In a telecommunication system (15) with at least one gateway (1), subscriber units (2), system controller (3), at least one communication satellite (4) and global positioning satellites (5), gateway (1) provides a global positioning data service to subscriber units (2). Gateway (1) receives ephemeris and almanac data on link (7) from global positioning satellites (5). Requests for portions of the data are received via link (11) and these portions are transmitted on link (10). Subscriber unit (2) receives on link (6) positioning information which is used by subscriber unit controller (33) to self-determine accurate location data. Subscriber unit (2) transmits a global positioning data service request via link (8) and receives the requested global positioning data service data via link (9).

    4.
    发明专利
    未知

    公开(公告)号：DE69926611T2

    公开(公告)日：2006-06-14

    申请号：DE69926611

    申请日：1999-06-01

    Applicant: MOTOROLA INC

    Inventor： HIETALA ALEX ,  KHLAT NADIM ,  CLEMENT PATRICK ,  KURBY CHRISTOPHER NEIL

    IPC: H03D3/00 ,  H04L27/22

    Abstract: A complex multiplier 51, for use in a radio receiver 20,30,50,60 for receiving a carrier signal modulated by a wanted signal, the modulated carrier signal occupying one of a plurality of channels whose central frequencies are separated from one another by a fixed frequency referred to as the channel spacing, the apparatus including a local oscillator 28 for generating first and second signals at a frequency which is not an integral multiple of half the channel spacing whereby when the received carrier signal is mixed with the first and second signals, a complex, digital Very Low Intermediate Frequency (VLIF) signal is generated in which the wanted signal is centred about a VLIF which is slightly larger than half the channel spacing. The complex multiplier phase and gain adjustment means for balancing the phase and gain of the I and Q components of the VLIF signal prior to or during its down-conversion to base-band.

    5.
    发明专利
    未知

    公开(公告)号：SE522147C2

    公开(公告)日：2004-01-20

    申请号：SE0202858

    申请日：2002-09-27

    Applicant: MOTOROLA INC

    Inventor： KURBY CHRISTOPHER NEIL

    IPC: G01S1/00 ,  G01S19/06 ,  G01S19/14 ,  G01S19/25 ,  H04B7/185 ,  H04Q7/38

    Abstract: In a telecommunication system (15) with at least one gateway (1), subscriber units (2), system controller (3), at least one communication satellite (4) and global positioning satellites (5), gateway (1) provides a global positioning data service to subscriber units (2). Gateway (1) receives ephemeris and almanac data on link (7) from global positioning satellites (5). Requests for portions of the data are received via link (11) and these portions are transmitted on link (10). Subscriber unit (2) receives on link (6) positioning information which is used by subscriber unit controller (33) to self-determine accurate location data. Subscriber unit (2) transmits a global positioning data service request via link (8) and receives the requested global positioning data service data via link (9).

    6.
    发明专利
    未知

    公开(公告)号：SE0202858L

    公开(公告)日：2002-09-27

    申请号：SE0202858

    申请日：2002-09-27

    Applicant: MOTOROLA INC

    Inventor： KURBY CHRISTOPHER NEIL

    IPC: G01S1/00 ,  G01S19/06 ,  G01S19/14 ,  G01S19/25 ,  H04B7/185 ,  H04Q7/38

    Abstract: In a telecommunication system (15) with at least one gateway (1), subscriber units (2), system controller (3), at least one communication satellite (4) and global positioning satellites (5), gateway (1) provides a global positioning data service to subscriber units (2). Gateway (1) receives ephemeris and almanac data on link (7) from global positioning satellites (5). Requests for portions of the data are received via link (11) and these portions are transmitted on link (10). Subscriber unit (2) receives on link (6) positioning information which is used by subscriber unit controller (33) to self-determine accurate location data. Subscriber unit (2) transmits a global positioning data service request via link (8) and receives the requested global positioning data service data via link (9).

    Transceiver and associated method for surviving fades
    7.
    发明专利
    Transceiver and associated method for surviving fades 未知

    公开(公告)号：GB2320656B

    公开(公告)日：2001-07-25

    申请号：GB9723275

    申请日：1997-11-05

    Applicant: MOTOROLA INC

    Inventor： KURBY CHRISTOPHER NEIL ,  ARENS JOHN W ,  RYAN KATHLEEN H

    IPC: H04L7/04 ,  H04B7/26 ,  H04B7/212 ,  H04J3/06

    Abstract: A time-framed communications transceiver maintains synchronization through fade conditions by resetting a counter (640) whenever new synchronization parameters are stored in a memory (630) based on bursts detected by a receiver (610) and a burst synchronizer (620). A transmitter (690) transmits bursts based upon the synchronization parameters in the memory (630) when the time counter (640) has not exceeded a predetermined period of time. The receiver (610) re-establishes the synchronization parameters in the memory (630) when the time counter exceeds another, longer predetermined period of time before transmission by the transmitter (690).

    SATELLITE-BASED RING ALERT APPARATUS AND METHOD OF USE
    9.
    发明专利
    SATELLITE-BASED RING ALERT APPARATUS AND METHOD OF USE 未知

    公开(公告)号：CA2201154A1

    公开(公告)日：1996-04-11

    申请号：CA2201154

    申请日：1995-07-28

    Applicant: MOTOROLA INC

    Inventor： OLDS KEITH ANDREW ,  VATT GREGORY BARTON ,  KURBY CHRISTOPHER NEIL

    IPC: H04B7/185 ,  H04Q7/38

    Abstract: A satellite communication system (116) provides users with global cellular coverage. To facilitate delivery of calls to users having subscriber units (300), a fixed channel is defined wherein subscriber units (300) are notified of incoming calls. Subscriber units (300) monitor this ring alert channel (48) and examine subscriber unit IDs (90) transmitted in a ring alert message (82) contained therein. When a subscriber unit (300) determines from the subscriber unit ID (90) that a call is being directed to it, it calls into a network to receive a call. Subscriber units (300) also monitor this fixed channel to receive a control channel directory identifying the location of a subscriber unit's broadcast (control) channels.

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