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    METHOD AND APPARATUS FOR OPTIMIZING SPECTRUM UTILIZATION BY A COGNITIVE RADIO NETWORK
    4.
    发明专利
    METHOD AND APPARATUS FOR OPTIMIZING SPECTRUM UTILIZATION BY A COGNITIVE RADIO NETWORK 未知

    公开(公告)号：CA2728838A1

    公开(公告)日：2010-04-08

    申请号：CA2728838

    申请日：2009-08-24

    Applicant: MOTOROLA INC

    Inventor： CHAUDHRI APOORV ,  GURNEY DAVID P ,  KUFFNER STEPHEN L ,  RAO YADUNANDANA N ,  SIMMS MATTHEW E

    IPC: H04W16/14 ,  H04W72/02

    Abstract: A technique for a secondary communication system to utilize spectrum designated to another (or primary) communication system is provided. By ranking a plurality of secondary base stations based on base station transmit power, calculated required transmit power and path loss, a set of cri-teria is developed for selecting a highest ranked secondary base station for operation within a primary's spectrum. The ranking may be adapted based on mobility of the secondary's subscriber; and as such the secondary system communicates within the primary's spectrum using the adaptively ranked base stations. Channel selection may also be ranked. The technique and apparatus allows a cognitive radio (CR) net-work to operate within an incumbent network's spectrum.

    FLEXIBLE CORRELATION AND QUEUEING IN CDMA COMMUNICATION SYSTEMS
    7.
    发明专利
    FLEXIBLE CORRELATION AND QUEUEING IN CDMA COMMUNICATION SYSTEMS 未知

    公开(公告)号：AU2003223290A1

    公开(公告)日：2003-11-10

    申请号：AU2003223290

    申请日：2003-03-17

    Applicant: MOTOROLA INC

    Inventor： GURNEY DAVID P ,  SCHOOLER ANTHONY R ,  YE ZHUAN ,  KIM YUN

    IPC: H04B1/709 ,  G06F17/15 ,  H04B7/08 ,  H04L27/30

    Abstract: A programmable correlator for a communication system includes an input queue coupled with an analog-to-digital converter (ADC). The input queue includes a random access memory (RAM) wherein sampled data streams from the ADC are written into the RAM. The input queue has two banks of memory of width 2M. A flexible complex correlator is operable on M samples. The correlator is coupled to read M complex samples out of 2M samples from the input queue. A pseudo-noise (PN) crossbar unit operates to rotate a generated PN code to match a rotation of the input queue data in the complex correlator.

    METHOD AND APPARATUS FOR SPECTRUM SHARING BETWEEN AN INCUMBENT COMMUNICATION SYSTEM AND A COGNITIVE RADIO SYSTEM
    9.
    发明专利
    METHOD AND APPARATUS FOR SPECTRUM SHARING BETWEEN AN INCUMBENT COMMUNICATION SYSTEM AND A COGNITIVE RADIO SYSTEM 未知

    公开(公告)号：CA2693483A1

    公开(公告)日：2009-02-05

    申请号：CA2693483

    申请日：2008-07-30

    Applicant: MOTOROLA INC

    Inventor： GURNEY DAVID P ,  CHAUDHRI APOORV ,  RAO YADUNANDANA N ,  SIMMS MATTHEW E

    IPC: H04W16/14

    Abstract: Efficient frequency spectrum sharing between at least one incumbent communication system(s) (102, 152) and at least one cognitive radio (CR) system (105) is provided. The incumbent system's system parameters and CR system's operational requirements are copied to a mirrored database (106B). The mirrored database (106B) is controlled by a either a central authority (108) or a database manager having delegated authority (508). The mirrored database (106B) is accessed by the CR system (105). The mirrored database (106B) can be modified and updated by the central authority (108) or delegated database manager (508) to correct for interference detected in the incumbent system caused (152) by the cognitive radio system (105). The cognitive radio system (105) utilizes the updated mirrored database (106B) to avoid interfering with the incumbent system (102, 152) to determine CR system operating parameters thus enhancing the ability to share spectrum.

    METHOD AND APPARATUS FOR OPTIMIZING SPECTRUM UTILIZATION BY A COGNITIVE RADIO NETWORK
    10.
    发明专利
    METHOD AND APPARATUS FOR OPTIMIZING SPECTRUM UTILIZATION BY A COGNITIVE RADIO NETWORK 未知

    公开(公告)号：CA2728838C

    公开(公告)日：2014-07-15

    申请号：CA2728838

    申请日：2009-08-24

    Applicant: MOTOROLA INC

    Inventor： CHAUDHRI APOORV ,  GURNEY DAVID P ,  KUFFNER STEPHEN L ,  RAO YADUNANDANA N ,  SIMMS MATTHEW E

    IPC: H04W16/14 ,  H04W72/02

    Abstract: A technique for a secondary communication system to utilize spectrum designated to another (or primary) communication system is provided. By ranking a plurality of secondary base stations based on base station transmit power, calculated required transmit power and path loss, a set of cri-teria is developed for selecting a highest ranked secondary base station for operation within a primary's spectrum. The ranking may be adapted based on mobility of the secondary's subscriber; and as such the secondary system communicates within the primary's spectrum using the adaptively ranked base stations. Channel selection may also be ranked. The technique and apparatus allows a cognitive radio (CR) net-work to operate within an incumbent network's spectrum.

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