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    12.
    发明专利
    未知

    公开(公告)号：DE69735788T2

    公开(公告)日：2007-01-11

    申请号：DE69735788

    申请日：1997-03-12

    Applicant: MOTOROLA INC

    Inventor： FREEBURG THOMAS A ,  GROSSMAN DANIEL B ,  ODLYZKO PAUL

    IPC: H04L12/28 ,  H04L12/56 ,  H04Q11/04 ,  H04W36/12

    Abstract: A radio communications system (10) having a mobile station (30) and at least two base stations (13, 14). ATM radio channels (31, 32) are provided between the remote station and base stations. Each of the ATM channels supports communication though ATM cells over a common frequency band. At least one ATM node (21) is coupled to the base stations. A base station controller (11) is coupled to the ATM node. The base station controller has a combiner (303) for combining cell streams received from the first and second base stations and an ATM signalling circuit (330) for sending ATM commands to the ATM node for dividing cell streams at the ATM node to the first and second base stations. The remote station (30) has a logic unit (520) for combining cell streams received from the first and second base stations during a handoff from the first base station to the second base station.

    Bit error rate detection
    13.
    发明专利
    Bit error rate detection 未知

    公开(公告)号：GR3024456T3

    公开(公告)日：1997-11-28

    申请号：GR970402029

    申请日：1997-08-14

    Applicant: MOTOROLA INC

    Inventor： FREEBURG THOMAS A

    IPC: H04L1/00 ,  H04L1/02 ,  H04L1/20

    Abstract: There is provided a scheme for bit error rate detection. It is characterised by: detecting the bit value present in a received multi-level signal (102), more narrowly detecting the bit value present in that received multi-level signal (104), comparing the results of narrow detection with the results detected otherwise to identify errors in detection (203, 206, 207 and 209), and accumulating detected symbol errors over unit time. Bit error rate detection can be used for antenna selection-selecting one of a plurality of diversity antennas when the error rate exceeds (213) a certain error threshold.

    16.
    发明专利
    未知

    公开(公告)号：ES2072876T3

    公开(公告)日：1995-08-01

    申请号：ES89113865

    申请日：1989-07-27

    Applicant: MOTOROLA INC

    Inventor： FREEBURG THOMAS A

    IPC: H04B7/26 ,  H04B7/08 ,  H04B7/10 ,  H04W16/24

    Abstract: A communication system for relatively high data bit rate RF communication overcomes multipath interference by employing relatively narrow beam antenna sectors and by selecting the best communication path established between two terminals (110, 120), at least one of which has narrow beam antenna sectors (1-6). The communication path selection process includes determining the signal integrity (380) of data communicated between the terminals. One implementation includes the narrow beam antenna sectors (16 & A-F) at each terminal.

    17.
    发明专利
    未知

    公开(公告)号：DE68922536D1

    公开(公告)日：1995-06-14

    申请号：DE68922536

    申请日：1989-07-27

    Applicant: MOTOROLA INC

    Inventor： FREEBURG THOMAS A

    IPC: H04B7/26 ,  H04B7/08 ,  H04B7/10 ,  H04W16/24

    Abstract: A communication system for relatively high data bit rate RF communication overcomes multipath interference by employing relatively narrow beam antenna sectors and by selecting the best communication path established between two terminals (110, 120), at least one of which has narrow beam antenna sectors (1-6). The communication path selection process includes determining the signal integrity (380) of data communicated between the terminals. One implementation includes the narrow beam antenna sectors (16 & A-F) at each terminal.

    18.
    发明专利
    未知

    公开(公告)号：AT122512T

    公开(公告)日：1995-05-15

    申请号：AT89113865

    申请日：1989-07-27

    Applicant: MOTOROLA INC

    Inventor： FREEBURG THOMAS A

    IPC: H04B7/26 ,  H04B7/08 ,  H04B7/10 ,  H04W16/24

    Abstract: A communication system for relatively high data bit rate RF communication overcomes multipath interference by employing relatively narrow beam antenna sectors and by selecting the best communication path established between two terminals (110, 120), at least one of which has narrow beam antenna sectors (1-6). The communication path selection process includes determining the signal integrity (380) of data communicated between the terminals. One implementation includes the narrow beam antenna sectors (16 & A-F) at each terminal.

    Networked satellite and terrestrial cellular radiotelephone systems
    19.
    发明专利
    Networked satellite and terrestrial cellular radiotelephone systems 未知

    公开(公告)号：AU6751594A

    公开(公告)日：1994-09-08

    申请号：AU6751594

    申请日：1994-07-18

    Applicant: MOTOROLA INC

    Inventor： FREEBURG THOMAS A

    IPC: H04B7/204 ,  H04B7/185 ,  H04Q7/38 ,  H04B7/19

    Abstract: There is provided a mechanism for networking satellite and terrestrial networks. It comprises: maintaining subscriber-received power levels of terrestrial network transmissions about one order of magnitude above co-channel satellite transmissions to overcome interference and maintaining subscriber transmissions to terrestrial networks at power levels about one order of magnitude of the below co-channel transmissions to satellite networks to avoid causing interference at the satellite. Such power level maintenance is provided by the network in communication with such subscriber. Moreover, a non-orbiting ("grounded") satellite cooperates as a switching node of both the satellite network and a terrestrial network to relay information between a terrestrial subscriber and the satellite radiotelephone network over a terrestrial network. The terrestrial network and the satellite network may communicate via either the inter-satellite spectrum or the terrestrial-to-satellite spectrum.

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