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    INITIAL CELL SEARCH ALGORITHM
    103.
    发明专利
    INITIAL CELL SEARCH ALGORITHM 未知

    公开(公告)号：CA2599806A1

    公开(公告)日：2002-09-06

    申请号：CA2599806

    申请日：2002-02-04

    Applicant: INTERDIGITAL TECH CORP

    Inventor： DEMIR ALPASLAN ,  GRIECO DONALD M

    IPC: H04B1/707 ,  H04B7/208 ,  H04B7/26 ,  H04J3/06 ,  H04L7/04 ,  H04W48/16

    Abstract: A method and an apparatus are disclosed for establishing a communication link between a user equipment (UE) and a base station in a wireless communication network. An incoming communication signal is sampled, wherein the sampling includes generating even and odd signal samples of the communication signal, a signal strength magnitude is approximated for each of the signal samples, and the signal strength magnitudes of the signal samples are accumulated. A peak sample is then identified, wherein the peak sample is the signal sample with a highest accumulated signal strength magnitude, an index value is assigned to the peak sample, wherein the index value indicates a chip location of a primary scrambling code, and a chip offset is assigned to the index value based on the index value. A code group number and slot offset is determined based on the chip offset, the primary scrambling code is retrieved based on the code group number and slot offset, and a search frequency of a UE is adjusted based on the primary scrambling code.

    104.
    发明专利
    未知

    公开(公告)号：DE60230052D1

    公开(公告)日：2009-01-08

    申请号：DE60230052

    申请日：2002-10-10

    Applicant: INTERDIGITAL TECH CORP

    Inventor： DEMIR ALPASLAN ,  OZLUTURK FATIH M

    IPC: H04B1/707 ,  H04B1/7073 ,  H04B1/7077 ,  H04B1/708 ,  H04B1/7093 ,  H04B7/216 ,  H04B7/26 ,  H04L7/08

    Abstract: A User Equipment (UE) receives and samples communication signals, where the communication signals have a time frame format, a transmission chip rate and a synchronization code associated with a time slot that includes a midamble that indicates a modulation of the synchronization code where a specified modulation of received synchronization codes identifies the timing for a timeslot in which data is to be received. The UE preferably includes a synchronization code determination circuit, a midamble determination circuit, and a phase modulation sequence detection circuit operatively associated with the midamble determination circuit. The UE can be configured for use with the low chip rate option of the Third Generation Partnership Project (3GPP) Universal Mobile Telecommunication System (UMTS) standards that employ a predefined set of downlink SYNC codes that point to midambles which indicate SYNC code modulation sequence to enable reading of data in a subsequent Broadcast Channel (BCH) message.

    105.
    发明专利
    未知

    公开(公告)号：DE60225861D1

    公开(公告)日：2008-05-08

    申请号：DE60225861

    申请日：2002-02-04

    Applicant: INTERDIGITAL TECH CORP

    Inventor： DEMIR ALPASLAN ,  GRIECO DONALD M

    IPC: H04B1/707 ,  H04B7/26 ,  H04J3/06 ,  H04L7/04 ,  H04W48/16

    Abstract: A method and an apparatus are disclosed for establishing a communication link between a user equipment (UE) and a base station in a wireless communication network. An incoming communication signal is sampled, wherein the sampling includes generating even and odd signal samples of the communication signal, a signal strength magnitude is approximated for each of the signal samples, and the signal strength magnitudes of the signal samples are accumulated. A peak sample is then identified, wherein the peak sample is the signal sample with a highest accumulated signal strength magnitude, an index value is assigned to the peak sample, wherein the index value indicates a chip location of a primary scrambling code, and a chip offset is assigned to the index value based on the index value. A code group number and slot offset is determined based on the chip offset, the primary scrambling code is retrieved based on the code group number and slot offset, and a search frequency of a UE is adjusted based on the primary scrambling code.

    INITIAL CELL SEARCH ALGORITHM
    106.
    发明专利
    INITIAL CELL SEARCH ALGORITHM 未知

    公开(公告)号：CA2439378C

    公开(公告)日：2007-11-20

    申请号：CA2439378

    申请日：2002-02-04

    Applicant: INTERDIGITAL TECH CORP

    Inventor： GRIECO DONALD M ,  DEMIR ALPASLAN

    IPC: H04B1/707 ,  H04B7/26 ,  H04J3/06 ,  H04L7/04 ,  H04W48/16

    Abstract: A system and method for establishing initial synchronization for the link between a UE and a base station in a communication network uses window exclusion logic in order to avoid a deadlock condition upon a detection of t he wrong public land mobile network (PLMN). The communication signal is process ed in a three step decision process. The first decision step (12) determines a chip offset of the strongest path detected over a frame of samples. In response to the first decision (12), the second step (14) generates a scrambling code group number and slot offset for retrieving the second synchronization code. The third decision step (16) retrieves a primary scrambling code in response to the code group number for synchronizing the U E to the base station.

    METODO Y APARATO PARA CALCULAR Y CORREGIR UN ERROR DE FRECUENCIA DE BANDA DE BASE EN UN RECEPTOR.
    108.
    发明专利
    METODO Y APARATO PARA CALCULAR Y CORREGIR UN ERROR DE FRECUENCIA DE BANDA DE BASE EN UN RECEPTOR. 未知

    公开(公告)号：MX2007005534A

    公开(公告)日：2007-06-19

    申请号：MX2007005534

    申请日：2005-10-19

    Applicant: INTERDIGITAL TECH CORP

    Inventor： DEMIR ALPASLAN ,  PIETRASKI PHILIP J ,  YANG RUI ,  BELURI MIHAELA C

    IPC: H03H7/40

    Abstract: Se proporciona un metodo y aparato para calcular y corregir un error de frecuencia de banda de base en un receptor. En una modalidad, un ecualizador realiza la ecualizacion sobre una corriente de datos de muestra y genera valores de interposicion de filtro en base en la ecualizacion. Se genera una senal de error de frecuencia calculada en base en por lo menos uno de los valores de interposicion de filtro. Se genera un fasor giratorio en base en la senal de error de frecuencia calculada. La senal de fasor giratorio se multiplica con la corriente de datos de muestra para corregir la frecuencia de la corriente de datos de muestra. En otra modalidad, un calculador de canal realiza el calculo de canal y genera indicadores de receptor de inclinacion en base por lo menos uno de los indicadores. Se genera una senal de error de frecuencia calculada en base en por lo menos uno de los indicadores.

    110.
    发明专利
    未知

    公开(公告)号：AT345601T

    公开(公告)日：2006-12-15

    申请号：AT05108806

    申请日：2002-02-04

    Applicant: INTERDIGITAL TECH CORP

    Inventor： DEMIR ALPASLAN ,  GRIECO DONALD M

    IPC: H04B1/707 ,  H04B7/26 ,  H04J3/06 ,  H04L7/04 ,  H04W48/16 ,  H04Q7/38

    Abstract: A method and an apparatus are disclosed for establishing a communication link between a user equipment (UE) and a base station in a wireless communication network. An incoming communication signal is sampled, wherein the sampling includes generating even and odd signal samples of the communication signal, a signal strength magnitude is approximated for each of the signal samples, and the signal strength magnitudes of the signal samples are accumulated. A peak sample is then identified, wherein the peak sample is the signal sample with a highest accumulated signal strength magnitude, an index value is assigned to the peak sample, wherein the index value indicates a chip location of a primary scrambling code, and a chip offset is assigned to the index value based on the index value. A code group number and slot offset is determined based on the chip offset, the primary scrambling code is retrieved based on the code group number and slot offset, and a search frequency of a UE is adjusted based on the primary scrambling code.

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