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    Automatic gain control for wireless receiver
    1.
    发明专利
    Automatic gain control for wireless receiver 审中-公开
    无线接收机自动增益控制

    公开(公告)号：JP2011101391A

    公开(公告)日：2011-05-19

    申请号：JP2010274468

    申请日：2010-12-09

    Applicant: Qualcomm Inc ,  クゥアルコム・インコーポレイテッドQualcomm Incorporated

    Inventor： MURTHY VINAY ,  KRISHNAMOORTHI RAGHURAMAN ,  LI LINBO

    IPC: H04B1/16 ,  H03G3/20 ,  H03G3/30

    CPC classification number: H03G7/007 ,  H03G3/3068 ,  H03G3/3078 ,  H03G3/3089 ,  H04B1/18 ,  H04L27/2601 ,  H04L27/2614 ,  H04L27/2647

    Abstract: PROBLEM TO BE SOLVED: To provide techniques for performing an automatic gain control (AGC) at a wireless receiver. SOLUTION: The total gain for a wireless receiver is achieved with discrete gain steps for analog circuitry and continuous gain for a digital variable gain amplifier (DVGA) 230. An AGC loop is updated based on power measurements for an output signal from the DVGA. A first gain for the analog circuitry is selected from multiple discrete gain values based on the AGC loop to maintain the average power of a baseband signal within a predetermined range at an analog-to-digital converter (ADC) 220 input. A second gain for the DVGA is selected based on the AGC loop to maintain the average power of the output signal at a reference power level. The first gain is switched in a manner to avoid saturation of the ADC caused by the baseband signal and to provide switching hysteresis. The AGC may be performed in log domain and with multiple modes. COPYRIGHT: (C)2011,JPO&INPIT

    Abstract translation: 要解决的问题：提供在无线接收机处执行自动增益控制（AGC）的技术。 解决方案：通过用于模拟电路的离散增益步长和数字可变增益放大器（DVGA）230的连续增益来实现无线接收器的总增益。根据来自 DVGA。 基于AGC环路的多个离散增益值选择模拟电路的第一增益，以将基带信号的平均功率维持在模数转换器（ADC）220输入的预定范围内。 基于AGC环路选择DVGA的第二增益，以将输出信号的平均功率维持在参考功率电平。 第一增益以避免由基带信号引起的ADC饱和并提供开关滞后的方式进行切换。 AGC可以在对数域和多种模式下执行。 版权所有（C）2011，JPO＆INPIT

    Automatic gain control for wireless receiver
    2.
    发明专利
    Automatic gain control for wireless receiver 审中-公开
    无线接收机自动增益控制

    公开(公告)号：JP2011097608A

    公开(公告)日：2011-05-12

    申请号：JP2010274469

    申请日：2010-12-09

    Applicant: Qualcomm Inc ,  クゥアルコム・インコーポレイテッドQualcomm Incorporated

    Inventor： MURTHY VINAY ,  KRISHNAMOORTHI RAGHURAMAN ,  LI LINBO

    IPC: H04B1/16 ,  H03G3/20 ,  H03G3/30

    CPC classification number: H03G7/007 ,  H03G3/3068 ,  H03G3/3078 ,  H03G3/3089 ,  H04B1/18 ,  H04L27/2601 ,  H04L27/2614 ,  H04L27/2647

    Abstract: PROBLEM TO BE SOLVED: To provide techniques for performing automatic gain control (AGC) at a wireless receiver.
    SOLUTION: The total gain for a wireless receiver is achieved with discrete gain steps for analog circuitry and continuous gain for a digital variable gain amplifier (DVGA) 230. An AGC loop is updated based on power measurements for an output signal from the DVGA. A first gain for the analog circuitry is selected from among multiple discrete gain values based on the AGC loop to maintain the average power of a baseband signal within a predetermined range at input of an analog-to-digital converter (ADC) 220. A second gain for the DVGA is selected based on the AGC loop to maintain the average power of the output signal at a reference power level. The first gain is switched in a manner to avoid saturation of the ADC caused by the baseband signal and to provide switching hysteresis. The AGC may also be performed in log domain and with multiple modes.
    COPYRIGHT: (C)2011,JPO&INPIT

    Abstract translation: 要解决的问题：提供在无线接收机处执行自动增益控制（AGC）的技术。 解决方案：无线接收机的总增益是通过模拟电路的离散增益步长和数字可变增益放大器（DVGA）230的连续增益来实现的。AGC环路是根据来自 DVGA。 基于AGC环路从多个离散增益值中选择模拟电路的第一增益，以在模数转换器（ADC）220的输入处将基带信号的平均功率维持在预定范围内。第二增益值 基于AGC环路选择DVGA的增益以将输出信号的平均功率维持在参考功率电平。 第一增益以避免由基带信号引起的ADC饱和并提供开关滞后的方式进行切换。 AGC也可以在对数域和多种模式下执行。 版权所有（C）2011，JPO＆INPIT

    5.
    发明专利
    未知

    公开(公告)号：AT472853T

    公开(公告)日：2010-07-15

    申请号：AT06738525

    申请日：2006-03-13

    Applicant: QUALCOMM INC

    Inventor： MURTHY VINAY ,  KRISHNAMOORTHI RAGHURAMAN ,  LI LINBO

    IPC: H03G3/30

    Abstract: An automatic gain control loop is updated at a first update rate in an acquisition mode and at a second update rate in a tracking mode. The second update rate is slower than the first update rate.

    Channel monitoring methods in wireless broadcast systems
    6.
    发明专利
    Channel monitoring methods in wireless broadcast systems 未知

    公开(公告)号：AU2008279024A1

    公开(公告)日：2009-01-29

    申请号：AU2008279024

    申请日：2008-07-25

    Applicant: QUALCOMM INC

    Inventor： LING FUYUN ,  LI LINBO ,  KRISHNAMOORTHI RAGHURAMAN ,  MANTRAVADI ASHOK

    IPC: H04W48/16

    Abstract: A wireless communication method is disclosed, comprising measuring a received signal strength indicator (RSSI) for a current radio frequency (RF); determining whether the measured RSSI is above a predetermined threshold value; monitoring neighboring RFs; and detecting the presence of the FLO (forward link only) signal in the neighboring RFs without detecting a time-division multiplexed pliot (TDM1). Also disclosed is a method of monitoring radio frequencies (RFs) at an access terminal in a wireless communication environment to detect a FLO (Forward link only) signal without detecting a time-division multiplexed pliot (TDM1), the method comprising detecting an energy level for a wide-area identity (WID) channel associated with a received signal; comparing the energy level for the WID channel with a predetermined threshold; and detecting a presence of the FLO signal based upon the comparison.

    Methods and apparatus for RF channel switching in a multi-frequency network
    7.
    发明专利
    Methods and apparatus for RF channel switching in a multi-frequency network 未知

    公开(公告)号：AU2008228728A1

    公开(公告)日：2008-09-25

    申请号：AU2008228728

    申请日：2008-03-21

    Applicant: QUALCOMM INC

    Inventor： KRISHNAMOORTHI RAGHURAMAN ,  CHEN AN MEI ,  LI LINBO ,  MANTRAVADI ASHOK ,  GUPTA BINITA ,  SHAH DEVARSHI

    IPC: H04W76/02 ,  H04W48/12 ,  H04W72/02

    Abstract: Methods and apparatus for RF channel switching in a multi-frequency network. In an aspect, a method includes identifying a multiplex set that comprises one or more content flows, wherein the multiplex set is one of a vertical multiplex (VM) set and a unified multiplex (UM) set, generating an overhead message that associates one or more RF carrier frequencies with the one or more content flows, and transmitting the overhead message over the multi-frequency network. An apparatus includes input logic configured to receive an overhead message that associates one or more content flows with one or more RF carrier frequencies, and processing logic configured to detect a channel switch event that identifies a selected content flow, determine a selected RF carrier frequency associated with the selected content flow based on the overhead message, and switch to the selected RF carrier frequency to receive the selected content flow.

    DIVERSIDAD DE CONMUTACION EN SISTEMAS DE DIFUSION DE OFDM BASADO EN MULTIPLES ANTENAS RECEPTORAS
    8.
    发明专利
    DIVERSIDAD DE CONMUTACION EN SISTEMAS DE DIFUSION DE OFDM BASADO EN MULTIPLES ANTENAS RECEPTORAS 未知

    公开(公告)号：AR059115A1

    公开(公告)日：2008-03-12

    申请号：ARP060104242

    申请日：2006-09-27

    Applicant: QUALCOMM INC

    Inventor： LI LINBO ,  MANTRAVADI ASHOK ,  LING FUYUN

    IPC: H04B7/08

    Abstract: Sistemas y métodos para mejorar la calidad de la senal en los receptores de una red inalámbrica. En una forma de realizacion, una antena es seleccionada de un subconjunto de antenas basada en un parámetro de calidad de la senal tal como la energía de la senal recibida o la relacion de senal o ruido (SNR). En otra forma de realizacion, las multiples antenas son aplicadas a las trayectorias independientes del procesamiento de la senal para las antenas respectivas donde la salida de las trayectorias es combinada entonces para mejorar la calidad total de la senal en el receptor

    9.
    发明专利
    未知

    公开(公告)号：BRPI0808971A2

    公开(公告)日：2014-09-02

    申请号：BRPI0808971

    申请日：2008-03-21

    Applicant: QUALCOMM INC

    Inventor： GUPTA BINITA ,  CHEN AN MEI ,  SHAH DEVARSHI ,  LI LINBO ,  KRISHNAMOORTHI RAGHURAMAN ,  MANTRADAVI ASHOK

    IPC: H04W76/02 ,  H04W48/12 ,  H04W72/02

    Abstract: Methods and apparatus for RF channel switching in a multi-frequency network. In an aspect, a method includes identifying a multiplex set that comprises one or more content flows, wherein the multiplex set is one of a vertical multiplex (VM) set and a unified multiplex (UM) set, generating an overhead message that associates one or more RF carrier frequencies with the one or more content flows, and transmitting the overhead message over the multi-frequency network. An apparatus includes input logic configured to receive an overhead message that associates one or more content flows with one or more RF carrier frequencies, and processing logic configured to detect a channel switch event that identifies a selected content flow, determine a selected RF carrier frequency associated with the selected content flow based on the overhead message, and switch to the selected RF carrier frequency to receive the selected content flow.

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