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    142.
    发明专利
    未知

    公开(公告)号：DE69936293D1

    公开(公告)日：2007-07-26

    申请号：DE69936293

    申请日：1999-01-07

    Applicant: INTERDIGITAL TECH CORP

    Inventor： MESECHER DAVID K ,  OZLUTURK FATIH M

    IPC: H01Q3/26 ,  H01Q1/24 ,  H04B1/12 ,  H04B1/38 ,  H04B7/08

    Abstract: An improved base station which cancels the effects of known fixed interference sources and produces a signal substantially free from the interference sources thereby increasing total channel capacity. The adaptive interference canceller base station includes a main antenna for receiving signals from other communication stations and at least one directional antenna directed toward an interference source. The main and directional antennas are coupled together such that an output signal substantially free from the interference is generated.

    CANCELLATION OF PILOT AND UNWANTED TRAFFIC SIGNALS IN A CDMA SYSTEM
    143.
    发明专利
    CANCELLATION OF PILOT AND UNWANTED TRAFFIC SIGNALS IN A CDMA SYSTEM 未知

    公开(公告)号：MY129383A

    公开(公告)日：2007-03-30

    申请号：MYPI20011838

    申请日：2001-04-18

    Applicant: INTERDIGITAL TECH CORP

    Inventor： OZLUTURK FATIH M

    IPC: H04B1/707

    Abstract: A GLOBAL PILOT AND UNWANTED TRAFFIC SIGNAL CANCELLER (61) FOR A SPREAD SPECTRUM COMMUNICATION SYSTEM (19) RECEIVER THAT REDUCES THEIR CONTRIBUTIVE NOISE EFFECTS. THE PRESENT INVENTIVE EFFECTIVELY CANCELS THE GLOBAL PILOT AND UNWANTED, ACTIVE TRAFFIC SIGNALS PRIOR TO DECODING A DESIRED TRAFFIC SIGNAL AT THE RECEIVER ((63). THE SYSTEM AND METHOD DECREASES THE BIT ERROR RATE (BER) YIELDING AN INCREASED SIGNAL-TO-NOISE RATIO.(FIG1 )

    ADAPTIVE RF AMPLIFIER PRELIMITER
    144.
    发明专利
    ADAPTIVE RF AMPLIFIER PRELIMITER 未知

    公开(公告)号：CA2451976C

    公开(公告)日：2007-01-16

    申请号：CA2451976

    申请日：2000-08-23

    Applicant: INTERDIGITAL TECH CORP

    Inventor： KIERNAN BRIAN ,  OZLUTURK FATIH M

    IPC: H03G3/20 ,  H03G11/04 ,  H04B1/04 ,  H04B1/707 ,  H04B7/005 ,  H04B7/216 ,  H04W52/22 ,  H04W52/34

    Abstract: The invention reduces transient peaks in signals transmitted in CDMA communication systems. A plurality of spread spectrum data signals are combined into a combined signal having fluctuating power level corresponding to the combination of the data signals. The combined signal is modulated to produce an RF signal f or transmission. The average power of the combined signal is measured over a selected time period. The combined signal power level is adaptively limited to a calculated power level based at least in part on the measured power.

    UN METODO Y UN APARATO PARA IMPLEMENTAR CODIFICACION (SFBC) EN UN SISTEMA DE COMUNICACION INALAMBRICA (OFDM)
    145.
    发明专利
    UN METODO Y UN APARATO PARA IMPLEMENTAR CODIFICACION (SFBC) EN UN SISTEMA DE COMUNICACION INALAMBRICA (OFDM) 未知

    公开(公告)号：AR050455A1

    公开(公告)日：2006-10-25

    申请号：ARP050103396

    申请日：2005-08-12

    Applicant: INTERDIGITAL TECH CORP

    Inventor： HUANG YUEJIN ,  KWAK JAEYOUNG ,  BULTAN AYKUT ,  ZEIRA ELDAD M ,  KOO CHANG-SOO ,  OLESEN ROBERT L ,  OZLUTURK FATIH M ,  PASAD KALPENDU R

    IPC: H04J99/00 ,  H04L27/08

    Abstract: La presente se refiere a un método y aparato para implementar la codificadora por bloques en espacio y frecuencia (SFBC) en un sistema de comunicaciones inalámbricas multiplex por division de frecuencia ortogonal (OFDM). La presente se aplica tanto a un modo de bucle cerrado como a un modo de bucle abierto. En el modo de bucle cerrado, la carga de potencia y la formacion del haz propio se realizan en base a la informacion del estado del canal (CSI). Una corriente de datos codificada en el canal se multiplexa en dos o más corrientes de datos. La carga de potencia se efectua en base a la CSI en cada una de las corrientes de datos multiplexadas. La codificacion SFBC se realiza en las corrientes de datos para cada una de las subportadoras agrupadas en pares. Luego, se realiza una formacion de haces propios en base a la CSI para calcular los haces propios en multiples antenas de transmision. La carga de potencia puede realizarse en dos o más bloques de codificacion SFBC o en cada modo propio. Adicionalmente, la carga de potencia puede efectuarse a través de las subportadoras o grupos de subportadoras para modos propios débiles.

    ADAPTIVE RF AMPLIFIER PRELIMITER
    146.
    发明专利
    ADAPTIVE RF AMPLIFIER PRELIMITER 未知

    公开(公告)号：MY126275A

    公开(公告)日：2006-09-29

    申请号：MYPI20020837

    申请日：2002-03-08

    Applicant: INTERDIGITAL TECH CORP

    Inventor： OZLUTURK FATIH M ,  KIERNAN BRIAN

    IPC: H03G11/04

    Abstract: THE INVENTION REDUCES TRANSIENT PEAKS IN SIGNALS TRANSMITTED IN CDMA COMMUNICATION SYSTEMS. A PLURALITY OF SPREAD SPECTRUM DATA SIGNALS ARE COMBINED (34) INTO A COMBINED SIGNAL (44) HAVING FLUCTUATING POWER LEVEL CORRESPONDING TO THE COMBINATION OF THE DATA SIGNALS. THE COMBINED SIGNAL (44) IS MODULATED (36) TO PRODUCE AN RF SIGNAL FOR TRANSMISSION. THE AVERAGE POWER OF THE COMBINED SIGNAL (44) IS MEASURED (52) OVER A SELECTED TIME PERIOD. THE COMBINED SIGNAL POWER LEVEL IS ADAPTIVELY LIMITED (54) TO A CALCULATED POWER LEVEL BASED AT LEAST IN PART ON THE MEASURED POWER. (FIG. 5)

    A METHOD OF CONTROLLING INITIAL POWER RAMP-UP IN CDMA SYSTEMS BY USING SHORT CODES.
    148.
    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：CA2413937C

    公开(公告)日：2006-04-11

    申请号：CA2413937

    申请日：1997-06-23

    Applicant: INTERDIGITAL TECH CORP

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

    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 transmitted subsequent to the confirmation signal transmitting. 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.

    ADAPTIVE CANCELLATION OF FIXED INTERFERERS
    149.
    发明专利
    ADAPTIVE CANCELLATION OF FIXED INTERFERERS 未知

    公开(公告)号：CA2419411C

    公开(公告)日：2006-01-03

    申请号：CA2419411

    申请日：1999-01-07

    Applicant: INTERDIGITAL TECH CORP

    Inventor： OZLUTURK FATIH M ,  MESECHER DAVID K

    IPC: H04B15/00 ,  H04Q7/36

    Abstract: An improved base station which cancels the effects of known fixed interference sources produces a signal substantially free from the interference sources thereby increasing total channel capacity. The adaptive interference cancele r system includes a main antenna for receiving signals from other communication stations and at least one directional antenna directed toward an interference source. The main and directional antennas are coupled to the adaptive canceler, which weights signals received by the directional antennas and sums the weighted signals to produc e a cancellation signal. The adaptive canceler subtracts the cancellation signal from the signals received by the main antenna to provide an output signal substantial ly free from the interference generated by the one or more known interference source s.

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