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    WIRELESS COMMUNICATION SYSTEM, APPARATUS AND METHOD
    15.
    发明专利
    WIRELESS COMMUNICATION SYSTEM, APPARATUS AND METHOD 未知

    公开(公告)号：AU2003240784A1

    公开(公告)日：2003-12-19

    申请号：AU2003240784

    申请日：2003-05-07

    Applicant: MOTOROLA INC

    Inventor： SERFATY SALOMON ,  GLAZER NIMROD ,  SHAHAF MARK

    IPC: H04L12/56 ,  H04W12/00 ,  H04W12/08 ,  H04W48/02 ,  H04Q7/38

    Abstract: A wireless communication system includes at least one wireless base station 122 having a processor 208 coupled to a transmitter, encrypting network identification data 330 for transmission to a remote, mobile communication unit 112. The unit 112 includes a receiver for receiving encrypted network identification data 340, from at least one of the base stations 122 and a processor 360 to decrypt the encrypted network identification data 340 in order to determine whether or not that the serving base station is a valid one. In this manner, fraudulent wireless base stations or fraudulent networks may be detected more readily.

    Radio communication system synchronisation
    16.
    发明专利
    Radio communication system synchronisation 未知

    公开(公告)号：GB2380903A

    公开(公告)日：2003-04-16

    申请号：GB0124639

    申请日：2001-10-13

    Applicant: MOTOROLA INC

    Inventor： SERFATY SALOMON ,  BRODY RAFAEL

    IPC: H04J3/06 ,  H04L12/801 ,  H04L12/28

    Abstract: A synchronising method for a communication system, wherein the communication system comprises a master device and a slave device, and the communication system supports a plurality of types of links between the master device and the slave device, a first one of the types of links comprising asynchronous connectionless links and a second one of the types of links comprising synchronous connection-oriented links; the method comprising implementing synchronisation using a combination of the asynchronous links and the synchronous links. Implementation in a Bluetooth system is described. Use of a chirp signal as a timing signal is described. A communications unit and system in which the method may be employed are also described. The method may also be used in a wide personal area network (WPAN) such as Bluetooth (RTM).

    Adaptive equalizer reacquisition in fast time varying channels
    19.
    发明专利
    Adaptive equalizer reacquisition in fast time varying channels 未知

    公开(公告)号：GB2242597A

    公开(公告)日：1991-10-02

    申请号：GB9006106

    申请日：1990-03-17

    Applicant: MOTOROLA INC

    Inventor： SERFATY SALOMON

    IPC: H04L25/03 ,  H04L27/22 ,  H04L27/38

    Abstract: An adaptive equalizer equalises a received signal having a predetermined number of degrees of rotational symmetry, such as QPSK signal or 16 QAM signal, and periodic predetermined symbol sequences for retraining. During retraining, one parallel adaptive equalizer is initiated for each degree (N) of symmetry. The known sequence rotated by each multiple of 2 pi /N, from 0 to 2 pi (N - 1 )/N is injected into the respective equalizers. The most effective equalizer is selected at the end of the retraining period for further equalization of the received signal, thus overcoming phase ambiguities which might arise during fading.

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