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    Apparatus for controlling initial power ramp-up in a CDMA system by using short codes
    13.
    发明申请
    Apparatus for controlling initial power ramp-up in a CDMA system by using short codes 有权
    用于通过使用短码来控制CDMA系统中的初始功率提升的装置

    公开(公告)号：US20020187797A1

    公开(公告)日：2002-12-12

    申请号：US10211090

    申请日：2002-08-02

    Applicant: InterDigital Technology Corporation

    Inventor： Fatih M. Ozluturk ,  Gary R. Lomp

    IPC: H04B007/00 ,  H04Q007/00 ,  H04Q007/20

    CPC classification number: H04W52/36 ,  H04B1/707 ,  H04B1/7075 ,  H04B1/70753 ,  H04B1/70755 ,  H04B1/70758 ,  H04B1/7077 ,  H04B1/708 ,  H04B7/2628 ,  H04B2201/70701 ,  H04B2201/70702 ,  H04B2201/70703 ,  H04B2201/7071 ,  H04W52/367 ,  H04W52/50 ,  H04W52/60

    Abstract: An apparatus for controlling transmission power during the establishment of a channel in a CDMA communication system utilizes the transmission of a short code from a subscriber unit to a base station during initial power ramp-up. The short code is a sequence for detection by the base station which has a much shorter period than a conventional spreading code. The ramp-up starts from a power level that is lower than the required power level for detection by the base station. The subscriber unit quickly increases transmission power while repeatedly transmitting the short code until the signal is detected by the base station. Once the base station detects the short code, it sends an indication to the subscriber unit to cease increasing transmission power. The use of short codes limits power overshoot and interference to other subscriber units and permits the base station to quickly synchronize to the spreading code used by the subscriber unit.

    Abstract translation: 用于在CDMA通信系统中建立信道期间控制发射功率的装置利用在初始功率提升期间从用户单元向基站传输短码。 短码是用于基站检测的序列，其具有比常规扩展码短得多的周期。 斜坡上升从低于基站检测所需功率电平的功率电平开始。 用户单元快速增加发射功率，同时重复发送短码直到基站检测到信号。 一旦基站检测到短码，它就向用户单元发送指示，以停止增加发射功率。 使用短码限制了其他用户单元的功率过冲和干扰，并允许基站快速同步到用户单元使用的扩展码。

    Modem for processing CDMA signals
    17.
    发明申请
    Modem for processing CDMA signals 有权
    用于处理CDMA信号的调制解调器

    公开(公告)号：US20030179819A1

    公开(公告)日：2003-09-25

    申请号：US10417384

    申请日：2003-04-16

    Applicant: InterDigital Technology Corporation

    Inventor： Gary R. Lomp ,  Leonid Kazakevich ,  Jeffrey S. Polan ,  David K. Mesecher

    IPC: H04L005/16 ,  H04B001/38

    CPC classification number: H04B7/0894 ,  H04J13/00 ,  H04W52/52

    Abstract: A modem is configured for demodulating a communication signal associated with a unique code-division multiple access (CDMA) code. The modem includes an adaptive matched filter and a vector correlator. The vector correlator generates filter coefficients for the adaptive matched filter based on signal distortion determined by the vector correlator. The vector correlator has a processing capacity of at least eleven chips whereby the vector correlator compensates for a known phase distortion and for multipath distortion ascertainable within its processing capacity. The adaptive matched filter processes communication signals with the unique CDMA code using coefficients generated by the vector correlator.

    Abstract translation: 调制解调器被配置用于解调与唯一码分多址（CDMA）码相关联的通信信号。 调制解调器包括自适应匹配滤波器和向量相关器。 矢量相关器基于由矢量相关器确定的信号失真产生自适应匹配滤波器的滤波器系数。 矢量相关器具有至少十一个芯片的处理能力，由此矢量相关器补偿已知的相位失真和在其处理能力内可确定的多径失真。 自适应匹配滤波器使用由矢量相关器产生的系数来处理具有唯一CDMA码的通信信号。

    Spread spectrum adaptive power control
    18.
    发明申请
    Spread spectrum adaptive power control 失效
    扩频自适应功率控制

    公开(公告)号：US20020122460A1

    公开(公告)日：2002-09-05

    申请号：US10071964

    申请日：2002-02-07

    Applicant: InterDigital Technology Corporation

    Inventor： Gary R. Lomp

    IPC: H04B015/00 ,  H04K001/00 ,  H04L027/30

    CPC classification number: H04W52/04 ,  H03G3/3042 ,  H03G3/3047 ,  H04B1/69 ,  H04B1/707 ,  H04B1/709 ,  H04B1/7093 ,  H04B1/7115 ,  H04B1/712 ,  H04B2201/70707 ,  H04J13/00 ,  H04J13/0003 ,  H04J13/10 ,  H04J13/16 ,  H04W52/22 ,  H04W52/221 ,  H04W52/225 ,  H04W52/228 ,  H04W52/36 ,  H04W52/362 ,  H04W52/367 ,  H04W52/52 ,  H04W52/54

    Abstract: A system and method for adaptive power control of a spread spectrum transmitter of a mobile unit operating in a cellular-communications network having a plurality of mobile units in communication with a base station. In response to a received signal from the mobile unit, the received signal having a first spread-spectrum signal and an interfering signal, an automatic gain control (AGC) circuit within the base station generates an AGC-output signal which is despread by a base despreader and then processed as a received-power level. A power command signal is generated using a threshold test and the received-power level. The power command signal is transmitted to the mobile station as a second spread-spectrum signal. The mobile station despreader despreads the second spread-spectrum signal as a power adjust signal and, responsive to the power adjust signal, increases or decreases the power level of the first spread spectrum signal.

    Abstract translation: 一种用于在具有与基站通信的多个移动单元的蜂窝通信网络中操作的移动单元的扩频发射机的自适应功率控制的系统和方法。 响应于来自移动单元的接收信号，具有第一扩频信号和干扰信号的接收信号，基站内的自动增益控制（AGC）电路产生AGC输出信号，其被基地 解扩器，然后作为接收功率级别进行处理。 使用阈值测试和接收功率电平来产生电力指令信号。 功率指令信号作为第二扩频信号发送到移动台。 移动站去扩展器将第二扩频信号解扩展为功率调整信号，并且响应于功率调整信号，增加或减少第一扩频信号的功率电平。

    CDMA subscriber unit having an improved antenna system
    19.
    发明申请
    CDMA subscriber unit having an improved antenna system 有权

    公开(公告)号：US20020093932A1

    公开(公告)日：2002-07-18

    申请号：US10073545

    申请日：2002-02-11

    Applicant: InterDigital Technology Corporation

    Inventor： Gary R. Lomp ,  Leonid Kazakevich ,  Jeffrey S. Polan ,  David K. Mesecher

    IPC: H04B007/216

    CPC classification number: H04B7/0894 ,  H04J13/00 ,  H04W52/52

    Abstract: A CDMA subscriber unit includes an antenna system having multiple antennas and delay units for receiving a transmitted signal and outputting a combined signal having a known distortion imparted by the antenna system. The combined signal is in turn processed by a modem, which compensates for the known distortion in a manner which provides improved signal gain. The improved signal gain permits a reduction in transmit power and, accordingly, increased capacity of the base station. Where the antenna system is to be remotely located from related signal processing equipment, separate units for the RF receiver/transmitter and the other signal processing equipment are provided so that the RF receiver/transmitter may also be remotely located along with the antenna system.

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