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    CELLULAR COMMUNICATIONS NETWORK HAVING AIRBORNE TRANSCEIVERS
    1.
    发明专利
    CELLULAR COMMUNICATIONS NETWORK HAVING AIRBORNE TRANSCEIVERS 未知

    公开(公告)号：CA2412918C

    公开(公告)日：2010-11-02

    申请号：CA2412918

    申请日：2001-06-22

    Applicant: MOTOROLA INC

    Inventor： GROSS JONATHAN H ,  EMMONS THOMAS PETER JR ,  TESSLER MICHAEL A

    IPC: H04B7/185

    Abstract: A cellular communications network (200, FIG. 2) includes one or more aircraft (210), which provide communication channels to cellular communications units, and also communicate with one or more base transceiver stations (206) and a control center (214). The control center receives (502, 602) telemetry and flight parameter information from the aircraft, and calculates (510, 606) network parameters based on the information. The control center transmits (512, 608) messages to the cellular network, including the aircraft, based on the calculated network parameters, and the aircraft and cellular network controls (612) its operations according to information within these messages.

    2.
    发明专利
    未知

    公开(公告)号：AT292340T

    公开(公告)日：2005-04-15

    申请号：AT01950395

    申请日：2001-06-22

    Applicant: MOTOROLA INC

    Inventor： GROSS JONATHAN H ,  EMMONS THOMAS PETER JR ,  WHITE SCOTT C ,  HANSON DUKE E

    IPC: H04B7/185

    Abstract: The present invention corrects for Doppler shift in both forward and reverse links in a cellular communications system including an airborne repeater. A reverse link pilot reference signal in a band similar to a communications signal band is received at a reverse link processor, and the Doppler shift in the reverse feeder link is corrected based on the reverse link pilot reference signal. The Doppler shift in the forward feeder link is also corrected based on the reverse link pilot reference signal prior to the forward feeder link being affected by the Doppler shift. The present invention also compensates for signal strength variations due to changing flight pattern positions of the repeater. Pre-compensation for forward feeder link path losses due to movement of the airplane is performed to cause communications signals transmitted to and from the cellular communications system repeater to have identical strength before the signals are transmitted to the system user cell phones within the area of coverage.

    GEOLOCATION TECHNIQUES FOR AN AIRBORNE CELLULAR SYSTEM
    4.
    发明专利
    GEOLOCATION TECHNIQUES FOR AN AIRBORNE CELLULAR SYSTEM 未知

    公开(公告)号：CA2413430A1

    公开(公告)日：2002-01-03

    申请号：CA2413430

    申请日：2001-06-27

    Applicant: MOTOROLA INC

    Inventor： BERKE JAMES F ,  MCCRAW DAWN M ,  EMMONS THOMAS PETER JR ,  GROSS JONATHAN H

    IPC: H04B7/185

    Abstract: A method of locating a billing area associated with a cell phone call initiated in an airborne cellular communications system (10) enables service providers to more accurately identify system user locations within the system's area of coverage. In operation, propagation delay and beam number location of an initiated call are identified to determine a current handset radial beam location. The propagation delay is then mapped to a stored close st corresponding radial geographic billing location, and the call is then associated with the closest corresponding radial geographic billing location . Additional system accuracy may be provided by determining azimuthal position within a beam footprint (116\) by determining a handoff location of a signal from a first beam to a second beam, and then mapping handoff information to a closest corresponding azimuthal geographic billing location. Both the closes t corresponding radial and azimuthal geographic billing locations are then use d to identify a current handset location. Such a system user location techniqu e also enables an airborne system to comply with FCC E911 caller location requirements.

    DOPPLER CORRECTION FOR AIRBORNE CELLULAR SYSTEM
    5.
    发明专利
    DOPPLER CORRECTION FOR AIRBORNE CELLULAR SYSTEM 未知

    公开(公告)号：CA2412912A1

    公开(公告)日：2002-01-03

    申请号：CA2412912

    申请日：2001-06-22

    Applicant: MOTOROLA INC

    Inventor： GROSS JONATHAN H ,  HANSON DUKE E ,  WHITE SCOTT C ,  EMMONS THOMAS PETER JR

    IPC: H04B7/185

    Abstract: The present invention corrects for Doppler shift in both forward and reverse links in a cellular communications system (10) including an airborne repeate r. A reverse link pilot reference signal in a band similar to a communications signal band is received at a reverse link processor, and the Doppler shift i n the reverse feeder link is corrected based on the reverse link pilot referen ce signal. The Doppler shift in the forward feeder link is also corrected based on the reverse link pilot reference signal prior to the forward feeder link being affected by the Doppler shift. The present invention also compensates for signal strength variations due to changing flight pattern positions of t he repeater. Pre-compensation for forward feeder link path losses due to moveme nt of the airplane (35) is performed to cause communications signals transmitte d to and from the cellular communications system repeater to have identical strength before the signals are transmitted to the system user cell phones (18) within the area of coverage.

    9.
    发明专利
    未知

    公开(公告)号：DE10084655T1

    公开(公告)日：2002-08-01

    申请号：DE10084655

    申请日：2000-04-05

    Applicant: MOTOROLA INC

    Inventor： GROSS JONATHAN H ,  ERLICK JOHN RICHARD ,  EMMONS JUN THOMAS PETER

    IPC: H04B7/185 ,  H04B7/204

    Abstract: In a satellite communications system (100), system capacity is improved using a satellite (110 and 120) that includes a main mission antenna (MMA) (310 FIG. 3), antenna subsystem (320), and controller (350). Antenna subsystem (320) comprises a beamformer and associated software to optimize the beam shape and cell position with respect to the satellite's location. In one example, beam optimization is performed using a location based on latitude. Satellite (110 and 120) determines its spatial position and determines its latitudinal location based on this position information. The satellite determines the number of cells, the cell sizes, and the beam steering angles required at this latitudinal location. In other cases, beam optimization is performed using a location based on latitude and longitude, system loading, and satellite health and status.

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