公开(公告)号：US09654159B2

公开(公告)日：2017-05-16

申请号：US14137042

申请日：2013-12-20

Applicant: MOTOROLA SOLUTIONS, INC

Inventor： Raul Salvi ,  Joseph P Heck ,  Geetha B Nagaraj ,  Shafiullah Syed

IPC: H04B1/12 ,  H04B1/00 ,  H03G3/30

CPC classification number: H04B1/123 ,  H03G3/3052 ,  H04B1/0067

Abstract: Disclosed herein are systems for and methods of using a mirrored wideband baseband current for automatic gain control of an RF receiver. In an embodiment, a system includes an RF receiver having an adjustable gain and being configured to direct convert a received wideband RF signal to a wideband baseband current signal. The system further includes a current replicator coupled to the receiver and configured to generate a mirrored current of the wideband baseband current signal. The system further includes a wideband signal-level detector configured to receive the mirrored current from the current replicator, and to measure and output a signal-level value of the mirrored current. The system further includes an automatic gain-control circuit configured to receive the signal-level value from the wideband signal-level detector, and to adjust the gain of the receiver based at least in part on the received signal-level value.

公开(公告)号：US09385763B1

公开(公告)日：2016-07-05

申请号：US14605481

申请日：2015-01-26

Applicant: MOTOROLA SOLUTIONS, INC

Inventor： Qicai Shi ,  Neiyer S Correal ,  Joseph P Heck ,  Spyros Kyperountas ,  Robert E Stengel

IPC: H04B1/04

CPC classification number: H04B1/1036 ,  H04B1/7107 ,  H04J11/0066 ,  H04L25/03821

Abstract: A communication device includes a receiver that is capable of canceling in -channel interference. The receiver includes an antenna for receiving a wireless signal comprising in-channel components and an out-of-channel component, wherein the in-channel components comprise a desired component and an in-channel interference component. A first filter of the receiver filters the wireless signal by blocking at least a portion of the out-of-channel component to produce a first signal comprising the in -channel components, and at least a second filter of the receiver filters the wireless signal by blocking at least a portion of the in-channel components to produce a second signal comprising the out-of-channel component. An in-channel interference estimator of the receiver generates an in-channel interference estimation signal based on the second signal. And a combiner of the filter combines the first signal and the second signal to at least partially cancel the in-channel interference component of the first signal.

Abstract translation: 通信设备包括能够消除信道间干扰的接收机。 接收机包括用于接收包括信道内分量和信道外分量的无线信号的天线，其中，信道内分量包括期望分量和信道内干扰分量。 接收机的第一滤波器通过阻挡信道外分量的至少一部分来产生包括信道内分量的第一信号来对无线信号进行滤波，并且接收器的至少第二滤波器通过 阻塞信道内分量的至少一部分以产生包括信道外分量的第二信号。 接收机的信道内干扰估计器基于第二信号产生信道内干扰估计信号。 并且滤波器的组合器组合第一信号和第二信号以至少部分地消除第一信号的信道内干扰分量。