公开(公告)号：US20140171001A1

公开(公告)日：2014-06-19

申请号：US13777691

申请日：2013-02-26

Applicant: QUALCOMM INCORPORATED

Inventor： Udara C. Fernando ,  Li-Chung Chang ,  Vijay K. Chellappa ,  Frederic Bossu ,  Ketan Humnabadkar ,  Gurkanwal Singh Sahota

IPC: H04B17/00

CPC classification number: H04B17/21

Abstract: Techniques for calibrating a receiver based on a local oscillator (LO) signal from another receiver are disclosed. In an exemplary design, an apparatus (e.g., a wireless device or an integrated circuit) includes first and second local oscillator (LO) generators. The first LO generator generates a first LO signal used by a first receiver for frequency downconversion. The second LO generator generates a second LO signal used by a second receiver for frequency downconversion in a first operating mode. The second LO signal is used to generate a test signal for the first receiver in a second operating mode. The second LO signal may be provided as the test signal or may be amplitude modulated with a modulating signal to generate the test signal. The test signal may be used to calibrate residual sideband (RSB), second order input intercept point (IIP2), receive path gain, etc.

Abstract translation: 公开了基于来自另一接收机的本地振荡器（LO）信号来校准接收机的技术。 在示例性设计中，装置（例如，无线装置或集成电路）包括第一和第二本地振荡器（LO）发生器。 第一LO发生器产生用于频率下变频的第一接收机使用的第一LO信号。 第二LO发生器在第一操作模式中产生由第二接收机用于频率下变频的第二LO信号。 第二LO信号用于在第二操作模式中为第一接收机生成测试信号。 第二LO信号可以作为测试信号提供，或者可以用调制信号进行幅度调制以产生测试信号。 测试信号可用于校准残余边带（RSB），二阶输入截点（IIP2），接收路径增益等。

公开(公告)号：US20130260699A1

公开(公告)日：2013-10-03

申请号：US13645245

申请日：2012-10-04

Applicant: QUALCOMM INCORPORATED

Inventor： Udara C. Fernando ,  Puay H. See ,  Sudarsan Krishnan

IPC: H04B1/44

CPC classification number: H04B17/24 ,  H04B17/0085 ,  H04B17/13 ,  H04B17/21

Abstract: A wireless communication device configured for automatic calibration is described. The wireless communication device includes a testing load. The wireless communication device also includes a transceiver chip. The wireless communication device further includes a radio frequency connector switch that couples circuitry on the transceiver chip to one of the testing load, an external load and a radiating element.

Abstract translation: 描述了配置用于自动校准的无线通信设备。 无线通信设备包括测试负载。 无线通信设备还包括收发器芯片。 无线通信设备还包括射频连接器开关，其将收发器芯片上的电路耦合到测试负载之一，外部负载和辐射元件。

公开(公告)号：US09154243B2

公开(公告)日：2015-10-06

申请号：US13777691

申请日：2013-02-26

Applicant: QUALCOMM Incorporated

Inventor： Udara C. Fernando ,  Li-Chung Chang ,  Vijay K. Chellappa ,  Frederic Bossu ,  Ketan Humnabadkar ,  Gurkanwal Singh Sahota

IPC: H04B17/00 ,  H04B17/21 ,  H04B1/06

CPC classification number: H04B17/21

Abstract: Techniques for calibrating a receiver based on a local oscillator (LO) signal from another receiver are disclosed. In an exemplary design, an apparatus (e.g., a wireless device or an integrated circuit) includes first and second local oscillator (LO) generators. The first LO generator generates a first LO signal used by a first receiver for frequency downconversion. The second LO generator generates a second LO signal used by a second receiver for frequency downconversion in a first operating mode. The second LO signal is used to generate a test signal for the first receiver in a second operating mode. The second LO signal may be provided as the test signal or may be amplitude modulated with a modulating signal to generate the test signal. The test signal may be used to calibrate residual sideband (RSB), second order input intercept point (IIP2), receive path gain, etc.

Abstract translation: 公开了基于来自另一接收机的本地振荡器（LO）信号来校准接收机的技术。 在示例性设计中，装置（例如，无线装置或集成电路）包括第一和第二本地振荡器（LO）发生器。 第一LO发生器产生用于频率下变频的第一接收机使用的第一LO信号。 第二LO发生器在第一操作模式中产生由第二接收机用于频率下变频的第二LO信号。 第二LO信号用于在第二操作模式中为第一接收机生成测试信号。 第二LO信号可以作为测试信号提供，或者可以用调制信号进行幅度调制以产生测试信号。 测试信号可用于校准残余边带（RSB），二阶输入截点（IIP2），接收路径增益等。

公开(公告)号：US20140220920A1

公开(公告)日：2014-08-07

申请号：US13758846

申请日：2013-02-04

Applicant: QUALCOMM INCORPORATED

Inventor： Udara C. Fernando ,  Prasad Srinivasa Siva Gudem

IPC: H04W52/02

CPC classification number: H04W52/0245 ,  H04B1/0007 ,  H04B1/0021 ,  H04B1/0025 ,  H04B1/0028 ,  Y02D70/00 ,  Y02D70/1262 ,  Y02D70/40

Abstract: A wireless device for receiving wireless signals based on channel conditions is described. The wireless device includes a direct sampling path used when operating in a direct sampling mode. The wireless device also includes a zero intermediate frequency path used when operating in a normal sampling mode. The wireless device further includes a first switch coupling a filter module input to an input of the direct sampling path and an input of the zero intermediate frequency path. The wireless device also includes a second coupling a filter module output to an output of the direct sampling path and an output of the zero intermediate frequency path. The first switch and the second switch are configured to switch between the direct sampling path and the zero intermediate frequency path based on a received signal power.

Abstract translation: 描述了一种基于信道条件接收无线信号的无线设备。 无线设备包括当以直接采样模式操作时使用的直接采样路径。 无线设备还包括在正常采样模式下工作时使用的零中频路径。 无线设备还包括将滤波器模块输入耦合到直接采样路径的输入和零中频路径的输入的第一开关。 无线设备还包括第二耦合滤波器模块输出到直接采样路径的输出和零中频路径的输出。 第一开关和第二开关被配置为基于接收信号功率在直接采样路径和零中间路径之间切换。