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    1.
    发明专利
    未知

    公开(公告)号：AT500662T

    公开(公告)日：2011-03-15

    申请号：AT08006410

    申请日：2008-03-31

    Applicant: QUALCOMM INC

    Inventor： HURT JAMES YOUNG ,  CHANDRASEKHAR PREETHI ,  RICK ROLAND REINHARD

    IPC: H04L1/00

    Abstract: A receiver is configured to determine a scaling factor and a carrier-to-interference cap for a communication signal based on the modulation format used or a measured carrier-to-interference ratio. The carrier-to-interference cap sets the limit for clipping of the signal to interference-plus-noise ratio of the communication signal.

    DIGITAL VARIABLE AMPLIFICATION FOLLOWED BY L-Q IMBALANCE CORRECTION
    3.
    发明申请
    DIGITAL VARIABLE AMPLIFICATION FOLLOWED BY L-Q IMBALANCE CORRECTION 审中-公开
    L-Q不平衡校正后的数字变量放大

    公开(公告)号：WO2014058752A3

    公开(公告)日：2014-06-12

    申请号：PCT/US2013063630

    申请日：2013-10-07

    Applicant: QUALCOMM INC

    Inventor： FERNANDES BARROS DANIEL JOSE ,  LUONG LE NGUYEN ,  HURT JAMES YOUNG ,  LY-GAGNON YANN ,  HUSTED PAUL JAMES

    IPC: H04L27/38 ,  H03D3/00 ,  H04L27/00

    CPC classification number: H04B1/1036 ,  G01S19/235 ,  H03D3/009 ,  H03J7/04 ,  H04B1/1027 ,  H04L27/2647 ,  H04L27/3809 ,  H04L27/3863 ,  H04L2027/003

    Abstract: Systems and methods are disclosed for compensating l-Q imbalance in a wireless receiver. The receiver may employ a quadrature down-converter (706, 708) configured to receive an RF signal input (702) and output an in-phase component and a quadrature component at an IF an IF rotation block (726, 728) configured to down-convert the in-phase and quadrature components to baseband and an l-Q correction block (736) configured to compensate for an l-Q imbalance in the received signal, wherein the l-Q correction block is positioned downstream from the IF rotation block in the signal path. Performing the l-Q correction after conversion to baseband and sample decimation (734) may allow the compensation calculations to operate at a reduced digital rate. Similarly, digitally adjusting the gain of the signal (732) prior to l-Q compensation may reduce the number of bits that are manipulated during the compensation process. These features may represent significant efficiencies as compared to l-Q corrections performed at IF.

    Abstract translation: 公开了用于补偿无线接收机中的I-Q不平衡的系统和方法。 接收机可以采用被配置为接收RF信号输入（702）的正交下变换器（706,708），并且在IF IF IF输出正相分量和正交分量，IF IF旋转块（726,728）被配置为向下 - 将同相和正交分量转换成基带和被配置为补偿接收信号中的lQ不平衡的lQ校正块（736），其中lQ校正块位于信号路径中的IF旋转块的下游。 在转换为基带和采样抽取之后执行l-Q校正（734）可以允许补偿计算以降低的数字速率运行。 类似地，在I-Q补偿之前数字地调整信号（732）的增益可以减少在补偿处理期间被操纵的位数。 与在IF执行的l-Q校正相比，这些特征可能表现出显着的效率。

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