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    Receiving station for cdma wireless system and method
    72.
    发明专利
    Receiving station for cdma wireless system and method 未知

    公开(公告)号：AU2003225019A8

    公开(公告)日：2003-11-03

    申请号：AU2003225019

    申请日：2003-04-17

    Applicant: INTERDIGITAL TECH CORP

    Inventor： HAIM JOHN W

    IPC: H04B1/707 ,  H04B7/26 ,  H04J13/00 ,  H04B7/216

    Abstract: A communication station, such as a UE or Node B of a 3GPP system, configured to receive channelization coded signals on physical channels of at least one composite channel within timeslots of a system time frame. The actual number of channelization codes received for the composite channel within a system time frame is determined. The transmitted channelization codes are then identified by performing a channelization code identification algorithm based on the determined number.

    Unidad de abonado y método para controlar la potencia de transmisión durante el establecimiento de un canal en un sistema de comunicación de AMDC
    75.
    发明专利
    Unidad de abonado y método para controlar la potencia de transmisión durante el establecimiento de un canal en un sistema de comunicación de AMDC 未知

    公开(公告)号：ES2530373T3

    公开(公告)日：2015-03-02

    申请号：ES07009968

    申请日：1997-06-23

    Applicant: INTERDIGITAL TECH CORP

    Inventor： OZLUTURK FATIH ,  LOMP GARY R ,  HAIM JOHN W

    IPC: H04B1/707 ,  H04B7/216 ,  H04J13/16 ,  H04L7/00 ,  H04W52/36 ,  H04W52/50 ,  H04W52/60

    Abstract: Un sistema que comprende: -una unidad de abonado (16) para controlar la potencia de transmisión durante el establecimiento de un canal en un sistema (10) de comunicación de acceso múltiple por división de código utilizando la transmisión de un código corto, que tiene un período mucho más corto que un código de expansión convencional, que es actualizada periódicamente y no porta datos durante el aumento de potencia inicial para limitar el exceso de potencia y las interferencias y permitir una rápida sincronización con una estación de base (14), comprendiendo la unidad de abonado: -medios (90; 158) para transmitir el código corto a una estación de base (14) a un nivel de potencia de transmisión que es más bajo que un nivel de potencia requerido para la detección por parte de la estación de base; -medios (160) para incrementar rápidamente dicha potencia de transmisión y transmitir repetidamente el código corto hasta que el código corto sea detectado por la estación de base, y, comprendiendo la estación de base: -medios (62) para transmitir la indicación a la unidad de abonado de que cese el incremento de potencia de transmisión una vez que el código corto haya sido detectado.

    FAST ADAPTIVE POWER CONTROL FOR A VARIABLE MULTIRATE COMMUNICATIONS SYSTEM
    76.
    发明专利
    FAST ADAPTIVE POWER CONTROL FOR A VARIABLE MULTIRATE COMMUNICATIONS SYSTEM 未知

    公开(公告)号：CA2569720C

    公开(公告)日：2013-04-23

    申请号：CA2569720

    申请日：2001-07-12

    Applicant: INTERDIGITAL TECH CORP

    Inventor： HAIM JOHN W

    IPC: H04B1/04 ,  H04W52/24 ,  H04B7/005 ,  H04B7/26 ,  H04L1/00 ,  H04W52/26

    Abstract: A system and a method of controlling transmitter power in a wireless communication system in which user data is processed as a multirate signal having a rate N(t) and in which the user data signal having rate N(t) is converted into a transmission data signal having a faster rate M(t) for transmission. The transmission power is adjusted on a relatively slow basis based on quality of data received by a receiver of the transmitted data. The transmitter power is determined as a function of N(t)/M(t) such that a change in the data rate in the multiple channels or the rate of the transmission data signal is compensated in advance of a quality of data based adjustment associated with such data rate change. Preferably, the user data signal having rate N(t) is converted into the transmission data signal having the faster rate M(t) by repeating selected data bits whereby the energy per bit to noise spectrum density ratio is increased in the transmission data signal.

    A METHOD OF CONTROLLING INITIAL POWER RAMP-UP IN CDMA SYSTEMS BY USING SHORT CODES
    80.
    发明专利
    A METHOD OF CONTROLLING INITIAL POWER RAMP-UP IN CDMA SYSTEMS BY USING SHORT CODES 未知

    公开(公告)号：CA2413954C

    公开(公告)日：2008-09-02

    申请号：CA2413954

    申请日：1997-06-23

    Applicant: INTERDIGITAL TECH CORP

    Inventor： OZLUTURK FATIH M ,  LOMP GARY R ,  HAIM JOHN W

    IPC: H04B1/707 ,  H04B7/216 ,  H04J13/16 ,  H04L7/00 ,  H04W52/36 ,  H04W52/50 ,  H04W52/60

    Abstract: A subscriber terminal using a method of controlling initial power ramp-up in CDMA systems by using short codes is disclosed. The subscriber terminal includes having its transmission power regulated, with means for transmitting a periodic signal at an initial predetermined power level and repeatedly retransmitting the periodic signal each retransmission occurring at successively higher power levels; means for receiving a confirmation signal, and means for terminating transmission of the periodic signal in response to the received confirmation; means for engaging in a closed loop power control procedure to regulate the subscriber unit transmission power, after the periodic signal transmission terminating; and means for transmitting a call signal. The subscriber terminal using a method of controlling initial power ramp-up in CDMA systems by using short codes is particularly useful for overcoming the problems of power overshoot and interference to other subscriber stations known in the art and to provide for a base station to quickly synchronize to the spreading code used by the subscriber unit.

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