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：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。