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    A METHOD OF CONTROLLING INITIAL POWER RAMP-UP IN CDMA SYSTEMS BY USING SHORT CODES
    131.
    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：CA2413948C

    公开(公告)日：2008-11-18

    申请号：CA2413948

    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 base station using a method of controlling initial power ramp-up in CDMA systems by using short codes is disclosed for controlling transmission power during the establishment of communications between a base station and another communicating unit is disclosed. The base station includes means for detecting a periodic signal having an initial predetermined power level, which is repeatedly sent to the base station at increasing power levels; means for transmitting a confirmation signal when a periodic signal having a sufficient power for detection is received; and means for receiving a call signal and transmitting closed loop power commands to control transmission level of the call signal. The disclosed base station is particularly useful for overcoming the problems of power overshoot and interference to other base stations known in the art and to provide for a base station to quickly synchronize to the spreading code used by the communicating unit.

    TEMPORIZADOR DE APAGADO PRECISO QUE UTILIZA UN RELOJ DE BAJO COSTO Y DE BAJA EXACTITUD
    133.
    发明专利
    TEMPORIZADOR DE APAGADO PRECISO QUE UTILIZA UN RELOJ DE BAJO COSTO Y DE BAJA EXACTITUD 未知

    公开(公告)号：AR060816A2

    公开(公告)日：2008-07-16

    申请号：ARP070101790

    申请日：2007-04-25

    Applicant: INTERDIGITAL TECH CORP

    Inventor： BULTAN AYKUT ,  HAIM JOHN W ,  KAZAKEVICH LEONID

    IPC: H04B1/16 ,  H04B7/005 ,  H04B7/01 ,  H04B7/015 ,  H04W52/28

    Abstract: Una unidad inalámbrica de transmision/recepcion (WTRU) utiliza un oscilador que provee exactitud para parámetros de comunicaciones sincronizadas en un modo activo, y opera a potencia reducida durante un modo de recepcion discontinua (DRX). Un reloj de tiempo real (RTC) es utilizado como el estándar de frecuencia durante la operacion de potencia reducida, y se efectua un ajuste de frecuencia mientras que el RTC es utilizado como el estándar de frecuencia. Al efectuar el ajuste de frecuencia, el RTC es capaz de ser utilizado como el estándar de frecuencia para períodos de tiempo sustanciales, reducido así el consumo de potencia de la WTRU durante el modo DRX.

    RECEPTOR CDMA TDD MEJORADO.
    135.
    发明专利
    RECEPTOR CDMA TDD MEJORADO. 未知

    公开(公告)号：ES2286477T3

    公开(公告)日：2007-12-01

    申请号：ES03772036

    申请日：2003-07-29

    Applicant: INTERDIGITAL TECH CORP

    Inventor： DIFAZIO ROBERT A ,  HAIM JOHN W

    IPC: H04L12/56 ,  H04B7/005 ,  H04B7/26

    Abstract: Un método para el control de la transmisión discontinua total (DTX) en un receptor en un sistema de comunicaciones inalámbrico, estando el método caracterizado porque comprende los pasos de: (a) determinar (610) si la DTX total está permitida en el intervalo de tiempo actual; (b) si no está permitida la DTX total en el intervalo de tiempo actual, establecer entonces (612) en falso un indicador de DTX total para el cuadro anterior, y finalizar el método; (c) si se permite la DTX total en el intervalo de tiempo actual, entonces: (d) determinar (620) si se ha detectado una ráfaga especial; (e) si ha sido detectada una ráfaga especial, establecer entonces (622) en verdadero el indicador de DTX total para el cuadro anterior, y finalizar el método; (f) si no se ha detectado una ráfaga especial, entonces: (g) determinar (630) si ha sido aceptado un indicador de combinación de formato de transporte (TFCI); (h) si ha sido aceptado el TFCI, establecer entonces (612) en falso el indicador de DTX totalpara el cuadro anterior, y finalizar el método; y (i) si no ha sido aceptado el TFCI, finalizar entonces el método sin establecer en (632) el DTX total para el cuadro anterior.

    FAST ADAPTIVE POWER CONTROL FOR A VARIABLE MULTIRATE COMMUNICATIONS SYSTEM
    136.
    发明专利
    FAST ADAPTIVE POWER CONTROL FOR A VARIABLE MULTIRATE COMMUNICATIONS SYSTEM 未知

    公开(公告)号：HK1102413A1

    公开(公告)日：2007-11-23

    申请号：HK07110596

    申请日：2006-04-26

    Applicant: INTERDIGITAL TECH CORP

    Inventor： HAIM JOHN W

    IPC: H04B1/04 ,  H04B20060101 ,  H04B7/005 ,  H04B7/26 ,  H04W52/24 ,  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) 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.

    FAST ADAPTIVE POWER CONTROL FOR A VARIABLE MULTIRATE COMMUNICATIONS SYSTEM
    138.
    发明专利
    FAST ADAPTIVE POWER CONTROL FOR A VARIABLE MULTIRATE COMMUNICATIONS SYSTEM 未知

    公开(公告)号：CA2417242C

    公开(公告)日：2007-03-20

    申请号：CA2417242

    申请日：2001-07-12

    Applicant: INTERDIGITAL TECH CORP

    Inventor： HAIM JOHN W

    IPC: H04B1/04 ,  H04B7/005 ,  H04B7/26 ,  H04W52/24 ,  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) 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 chang e in the data rate in the multiple channels or the rate of the transmission da ta signal is compensated in advance of a quality of data based adjustment associated with such data rate change. Preferably, the user data signal havi ng 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 nois e spectrum density ratio is increased in the transmission data signal.

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