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    I/Q CALIBRATION OF TRANSMIT AND RECEIVE PATHS IN OFDM FDD COMMUNICATION SYSTEMS
    3.
    发明申请
    I/Q CALIBRATION OF TRANSMIT AND RECEIVE PATHS IN OFDM FDD COMMUNICATION SYSTEMS 审中-公开
    OFDM FDD通信系统中的发送和接收码的I / Q校准

    公开(公告)号：WO2010014805A1

    公开(公告)日：2010-02-04

    申请号：PCT/US2009/052247

    申请日：2009-07-30

    Applicant: QUALCOMM INCORPORATED ,  KOHLMANN, Michael

    Inventor： KOHLMANN, Michael

    IPC: H04L27/26 ,  H04L27/36 ,  H04L27/38 ,  H04L27/00

    CPC classification number: H04L27/368 ,  H04L27/2627 ,  H04L27/2649 ,  H04L27/3863 ,  H04L2027/0016 ,  H04L2027/0018 ,  H04L2027/0024

    Abstract: I/Q gain and phase mismatches of both transmit and receive paths of an OFDM FDD transceiver are simultaneously estimated. An up-converted RF signal is generated when the transmit path performs IQ modulation on a reference signal having a single sideband tone. The up-converted RF signal is sent via a loop-back path to the receive path. A down-converted evaluation signal is generated when the receive path performs IQ demodulation on the up-converted RF signal. The single evaluation signal is used to determine the transmit path gain and phase mismatches and the receive path gain and phase mismatches. The four I/Q mismatches are estimated without using significant hardware not otherwise used in the regular transmission of data signals. The I/Q mismatches in data signals are corrected by pre-processing the up-converted RF signals and post-processing the down-converted RF signals by adding attenuated components of the in-phase and quadrature-phase signals to each other.

    Abstract translation: 同时估计OFDM FDD收发器的发送和接收路径的I / Q增益和相位失配。 当发送路径对具有单个边带色调的参考信号执行IQ调制时，产生上变频的RF信号。 经上变频的RF信号通过环回路径发送到接收路径。 当接收路径对上转换的RF信号执行IQ解调时，产生下变频的评估信号。 单个评估信号用于确定发射路径增益和相位不匹配以及接收路径增益和相位不匹配。 在不使用数据信号的常规传输中没有使用的重要硬件的情况下，估计四个I / Q不匹配。 数据信号中的I / Q不匹配通过预处理上转换的RF信号并且通过将同相和正交相位信号的衰减分量相加来对下变频的RF信号进行后处理来校正。

    RF TRANSCEIVER IC HAVING INTERNAL LOOPBACK CONDUCTOR FOR IP2 SELF TEST
    5.
    发明申请
    RF TRANSCEIVER IC HAVING INTERNAL LOOPBACK CONDUCTOR FOR IP2 SELF TEST 审中-公开
    具有IP2自检功能的内部回路导线器的射频收发器IC

    公开(公告)号：WO2010057035A1

    公开(公告)日：2010-05-20

    申请号：PCT/US2009/064454

    申请日：2009-11-13

    Applicant: QUALCOMM INCORPORATED ,  KO, Jin-Su ,  KOHLMANN, Michael ,  AHRARI, Bahman

    Inventor： KO, Jin-Su ,  KOHLMANN, Michael ,  AHRARI, Bahman

    IPC: H04B1/40 ,  H03D7/00 ,  H04B17/00

    CPC classification number: H04B1/40 ,  H03D7/168

    Abstract: An RF transceiver integrated circuit has a novel segmented, low parasitic capacitance, internal loopback conductor usable for conducting IP2 self testing and/or calibration. In a first novel aspect, the transmit mixer of the transceiver is a current mode output mixer. The receive mixer is a passive mixer that has a low input impedance. In the loopback mode, the transmit mixer drives a two tone current signal to the passive mixer via the loopback conductor. In a second novel aspect, only one quadrature branch of the transmit mixer is used to generate both tones required for carrying out an IP2 test. In a third novel aspect, a first calibration test is performed using one quadrature branch of the transmit mixer at the same time that a second calibration test is performed using the other quadrature branch, thereby reducing loopback test time and power consumption.

    Abstract translation: RF收发器集成电路具有新颖的分段，低寄生电容，可用于进行IP2自检和/或校准的内部环回导体。 在第一个新颖的方面，收发器的发射混频器是电流模式输出混频器。 接收混频器是具有低输入阻抗的无源混频器。 在环回模式下，发射混频器通过环回导体将两声音电流信号驱动到无源混频器。 在第二个新颖的方面，发射混频器只有一个正交分支用于产生执行IP2测试所需的两个音调。 在第三个新颖的方面，使用发射混频器的一个正交分支进行第一校准测试，同时使用其他正交分支执行第二校准测试，从而减少环回测试时间和功耗。

    ENHANCING DATA THROUGHPUT USING MULTIPLE RECEIVERS
    7.
    发明申请
    ENHANCING DATA THROUGHPUT USING MULTIPLE RECEIVERS 审中-公开
    使用多个接收器增强数据吞吐量

    公开(公告)号：WO2015138098A1

    公开(公告)日：2015-09-17

    申请号：PCT/US2015/016485

    申请日：2015-02-19

    Applicant: QUALCOMM INCORPORATED

    Inventor： KOHLMANN, Michael ,  PERSICO, Charles James ,  KIM, Beomsup

    IPC: H04B1/3805

    CPC classification number: H04B7/0868 ,  H04B1/0082 ,  H04B1/16 ,  H04B1/18 ,  H04B1/3805 ,  H04W24/08

    Abstract: An apparatus includes a first low noise amplifier (LNA) in a first receive path. The apparatus further includes receive circuitry in the first receive path. The receive circuitry is configured to receive an output of the first LNA and to receive an output of a second LNA within a second receive path.

    Abstract translation: 一种装置包括在第一接收路径中的第一低噪声放大器（LNA）。 该装置还包括在第一接收路径中的接收电路。 接收电路被配置为接收第一LNA的输出并且在第二接收路径内接收第二LNA的输出。

    POWER FALLBACK WIRELESS LOCAL AREA NETWORK RECEIVER
    9.
    发明申请
    POWER FALLBACK WIRELESS LOCAL AREA NETWORK RECEIVER 审中-公开
    功率倒退无线局域网接收机

    公开(公告)号：WO2017192203A1

    公开(公告)日：2017-11-09

    申请号：PCT/US2017/020736

    申请日：2017-03-03

    Applicant: QUALCOMM INCORPORATED

    Inventor： EMADI, Mohammad ,  KHALILI, Alireza ,  TAGHIVAND, Mazhareddin ,  KIM, Youhan ,  DIETZE, Kai ,  KOHLMANN, Michael ,  GARDNER, James ,  YUCEK, Tevfik ,  KIM, Beomsup

    IPC: H04W52/02

    CPC classification number: H04W52/0245 ,  H04B17/318 ,  H04W84/12 ,  Y02D70/1262 ,  Y02D70/142 ,  Y02D70/144 ,  Y02D70/164 ,  Y02D70/22

    Abstract: Power conservation in a radio frequency front end of a user equipment (UE) during wireless local area network (WLAN) communication is achieved by adjusting a power mode of the radio frequency front end. In one instance, the UE determines a signal strength of a received frame of a packet during a short training field of a preamble of the received frame. The determining occurs when a WLAN receiver is operating in a low power mode. The UE then switches the WLAN receiver to a high power mode during the short training field of the preamble or during a first segment of a long training field of the preamble when the signal strength is above a predetermined signal strength.

    Abstract translation: 在无线局域网（WLAN）通信期间用户设备（UE）的射频前端中的功率节省是通过调整射频前端的功率模式来实现的。 在一个实例中，UE在接收帧的前导码的短训练字段期间确定分组的接收帧的信号强度。 当WLAN接收器在低功率模式下运行时，确定发生。 然后，当信号强度高于预定信号强度时，UE在前导码的短训练字段期间或在前导码的长训练字段的第一段期间将WLAN接收器切换到高功率模式。

    METHODS AND APPARATUS FOR POWER AMPLIFIER CALIBRATION
    10.
    发明申请
    METHODS AND APPARATUS FOR POWER AMPLIFIER CALIBRATION 审中-公开
    功率放大器校准的方法和装置

    公开(公告)号：WO2012142181A1

    公开(公告)日：2012-10-18

    申请号：PCT/US2012/033154

    申请日：2012-04-11

    Applicant: QUALCOMM Incorporated ,  STEELE, Gregory ,  KOHLMANN, Michael ,  GARDNER, James, M.

    Inventor： STEELE, Gregory ,  KOHLMANN, Michael ,  GARDNER, James, M.

    IPC: H04B17/00 ,  H03G3/30

    CPC classification number: H03G3/3042 ,  H04B17/13

    Abstract: This disclosure provides systems, methods and apparatus for calibrating actual output power of a transmit power sensor for closed loop power control using a quality metric such as error vector magnitude (EVM) to improve power detection accuracy. In one aspect a method for correlating an output of a transmit power sensor with actual output power of a wireless transmitter is provided. The method includes deriving a characteristic correlation between an actual output power of a set of transmit amplifiers and an output power and of a set of corresponding power detection circuits over a range of transmit power levels in a corresponding set of wireless communication devices. The method further includes storing the characteristic correlation in a wireless device that is not part of the set from which the characteristic correlation was derived. The method further includes sensing an output of a transmit power sensor of the wireless device while the wireless transmitter of the wireless device transmits according to one or more first gain settings. The method further includes producing an estimate of actual output power based at least in part on the characteristic correlation. The method further includes adjusting gain setting data based at least in part on the estimate of actual output power.

    Abstract translation: 本公开提供了使用诸如误差矢量幅度（EVM）的质量度量来校准发射功率传感器的闭环功率控制的实际输出功率的系统，方法和装置，以提高功率检测精度。 在一个方面，提供了一种用于将发射功率传感器的输出与无线发射机的实际输出功率相关联的方法。 该方法包括在相应的一组无线通信设备中的发射功率电平的范围内导出一组发射放大器的实际输出功率与输出功率与一组相应功率检测电路之间的特性相关性。 该方法还包括将特征相关性存储在不是从其导出特征相关性的集合的一部分的无线设备中。 该方法还包括在无线设备的无线发射机根据一个或多个第一增益设置发射时，感测无线设备的发射功率传感器的输出。 该方法还包括至少部分地基于特征相关性产生实际输出功率的估计。 该方法还包括至少部分地基于实际输出功率的估计来调整增益设置数据。

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