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    71.
    发明专利
    未知

    公开(公告)号：DK1269655T3

    公开(公告)日：2004-09-06

    申请号：DK01926458

    申请日：2001-03-28

    Applicant: INTERDIGITAL TECH CORP

    Inventor： KAZAKEVICH LEONID ,  CABROL PATRICK

    IPC: H03F3/24 ,  H03F1/02 ,  H03F1/06 ,  H03F1/30 ,  H03G3/30 ,  H04B7/005

    Abstract: A communication signal input (20) provides a voice or data wireless signal (32) for transmission. A detector (14) removes the modulation component from the spread communication signal and provides a voltage to a voltage-to-current converter (16) controlled by a transmit power control (TPC) signal (26). An output current (30) and the output signal (38) are connected to a current mirror (18) that outputs a bias signal (34) to a radio frequency (RF) power amplifier (12). An independent claim is also included for a method of dynamically biasing an RF power amplifier.

    72.
    发明专利
    未知

    公开(公告)号：DE60104557D1

    公开(公告)日：2004-09-02

    申请号：DE60104557

    申请日：2001-10-12

    Applicant: INTERDIGITAL TECH CORP

    Inventor： JACQUES ALEXANDER ,  KAZAKEVICH LEONID ,  SILVERBERG AVI

    IPC: H03G3/20 ,  H03G3/30 ,  H04B1/16 ,  H04B7/005 ,  H04J3/00

    Abstract: In a TDD wireless communication system between transmitters and associated receivers, automatic gain control of a receiver is only applied during the corresponding time slot within the TDD signal time frame architecture. Successive received signal strengths are measured and gain levels are stored as estimates for an initial gain level in future time slots of the TDD signal. Estimating techniques, such as averaging or trending of received signal strength over successive time slots, and averaging or trending of gain level settings, provide improved estimation of future initial gain levels.

    75.
    发明专利
    未知

    公开(公告)号：ES2204186T3

    公开(公告)日：2004-04-16

    申请号：ES99967532

    申请日：1999-12-23

    Applicant: INTERDIGITAL TECH CORP

    Inventor： BIRD JOHN ,  KAZAKEVICH LEONID

    IPC: H03G3/30 ,  H04B1/04 ,  H04B1/40 ,  H04B3/08 ,  H04B3/36 ,  H04B7/26 ,  H04B17/00 ,  H04W88/08 ,  H04Q7/30

    Abstract: A wireless communications systems employing code-division multiple access information transmission techniques includes a transmission facility having ground-based transmission and reception electronic equipment, a remotely located RF power amplifier, an antenna, and an RF cable connecting the ground-based equipment with the remotely located RF power amplifier. Power level detectors in the ground-based equipment and in the remotely located RF power amplifier measure the signal level at each end of the RF cable. A microcontroller compares these measurements and adjusts a variable attenuator in the transmission signal path and a variable attenuator in the received signal path to compensate for signal level variability due to variations in signal loss.

    WIRELESS COMMUNICATION METHOD AND SYSTEM WITH CONTROLLED WTRU PEER-TO-PEER COMMUNICATIONS
    76.
    发明专利
    WIRELESS COMMUNICATION METHOD AND SYSTEM WITH CONTROLLED WTRU PEER-TO-PEER COMMUNICATIONS 未知

    公开(公告)号：CA2500656A1

    公开(公告)日：2004-04-15

    申请号：CA2500656

    申请日：2003-09-30

    Applicant: INTERDIGITAL TECH CORP

    Inventor： KAZAKEVICH LEONID ,  HUNKELER TERESA ,  CHANDRA ARTY ,  CHITRAPU PRABHAKAR R ,  REDDY GAUTAM G

    IPC: H04B7/26 ,  G01S5/00 ,  H04L12/28 ,  H04L12/56 ,  H04L29/02 ,  H04W4/02 ,  H04W64/00 ,  H04W84/00 ,  H04W88/04 ,  H04W88/06 ,  H04Q7/00

    Abstract: A wireless network provides controlled wireless communications with multi-mo de wireless WTRUs (33, 37). The wireless network has at least one base station (25) having a transceiver operating in an infrastructure communication mode withmulti mode WTRUs and a controller that transmits control signals via infrastructure communications with a WTRU that control peer-to-peer mode communications (40) of that WTRU with other WTRUs. A WTRU has transceiver components configured for selective operation in an infrastructure communication mode with a network base station and in a peer-to-peer communication mode with other WTRUs. The WTRU also has a transceiver controller configured to selectively control peer-to-peer mode communication s with other WTRUs based on communication signals received in infrastructure communications with a network base station. Preferably, the transceiver controller is configured to control the transceiver components to switch between infrastructure communication mode and peer-to-peer communication mod e based on(duality of Service criteria).

    80.
    发明专利
    未知

    公开(公告)号：NO20031590D0

    公开(公告)日：2003-04-08

    申请号：NO20031590

    申请日：2003-04-08

    Applicant: INTERDIGITAL TECH CORP

    Inventor： OLESEN ROBERT L ,  AXNESS TIMOTHY A ,  KAZAKEVICH LEONID

    IPC: H03G3/20 ,  H04L5/16 ,  H03M1/18 ,  H04B1/16 ,  H04B1/707 ,  H04B7/005 ,  H04B17/00 ,  H04J3/00 ,  H04L5/14 ,  H04B

    Abstract: A method and system for automatic gain control (AGC) in a TDD communication system, wherein each time slot of the communication signal contains a preamble in binary phase shift keying (BPSK) format, located at the beginning of the time slot. The channel estimation by the receiver is improved since the preamble allows AGC to quickly estimate the signal strength and adjust the gain accordingly. This permits all data symbols within the data burst, which follows the preamble, to be correctly received, and results in a midamble channel estimate that is much more accurate. It also allows the AGC circuit within the TDD receiver to be greatly simplified.

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