公开(公告)号：US09136989B2

公开(公告)日：2015-09-15

申请号：US14050934

申请日：2013-10-10

Applicant: MOTOROLA SOLUTIONS, INC

Inventor： Dennis M. Drees ,  Bryan A. Hoon

IPC: H04B1/04 ,  H04L1/20 ,  H03C1/62

CPC classification number: H04L1/206 ,  H04L27/14

Abstract: In an embodiment, an apparatus comprises an in-phase-quadrature (IQ) signal amplifier having an IQ baseband input, an IQ mixer input connected to the IQ signal amplifier, a carrier leakage detector connected to outputs of the IQ mixer, and a carrier-null offset signal generator connected to the carrier leakage detector. The IQ mixer is configured to be driven by an IQ carrier signal. The carrier leakage detector is configured to output an in-phase leakage level measurement and a quadrature leakage level measurement in the absence of an IQ baseband signal at the IQ baseband input. The carrier-null offset signal generator is configured to (i) inject an in-phase carrier-null offset signal based on the in-phase leakage level measurement and (ii) inject a quadrature carrier-null offset signal based on the quadrature leakage level measurement.

Abstract translation: 在一个实施例中，一种装置包括具有IQ基带输入的同相正交（IQ）信号放大器，连接到IQ信号放大器的IQ混频器输入，连接到IQ混频器的输出的载波泄漏检测器，以及载波 - 负偏移信号发生器连接到载波泄漏检测器。 IQ混频器配置为由IQ载波信号驱动。 载波泄漏检测器被配置为在IQ基带输入处没有IQ基带信号的情况下输出同相泄漏电平测量和正交泄漏电平测量。 载波零点偏移信号发生器被配置为（i）基于同相泄漏电平测量注入同相载波偏移信号，以及（ii）基于正交泄漏电平注入正交载波 - 零偏移信号 测量。