公开(公告)号：US09673847B1

公开(公告)日：2017-06-06

申请号：US14952706

申请日：2015-11-25

Applicant: ANALOG DEVICES, INC.

Inventor： Christopher Mayer ,  David J. McLaurin ,  Martin S. McCormick ,  Chris Angell ,  Manish J. Manglani

IPC: H04B1/04 ,  H04L1/00 ,  H04B1/40 ,  H04B17/13

CPC classification number: H04B1/0475 ,  H04B1/40 ,  H04B17/13 ,  H04B2001/0425 ,  H04L1/0042

Abstract: Apparatus and methods for transceiver calibration are provided. In certain configurations, a transceiver includes a transmit channel and an observation channel. The transmit channel includes a transmit mixer that up-converts a transmit signal by a first or transmit local oscillator frequency. The observation channel includes an observation mixer that down-converts an observed signal from the transmit channel by a second or observation local oscillator frequency that is offset from the first local oscillator frequency. By observing the transmit channel using a local oscillator frequency that is offset relative to the transmit channel's local oscillator frequency, the observation channel can observe transmit channel impairments substantially independently from observation channel impairments.

公开(公告)号：US20170149457A1

公开(公告)日：2017-05-25

申请号：US14952706

申请日：2015-11-25

Applicant: ANALOG DEVICES, INC.

Inventor： Christopher Mayer ,  David J. McLaurin ,  Martin S. McCormick ,  Chris Angell ,  Manish J. Manglani

IPC: H04B1/04 ,  H04B1/40 ,  H04B17/13 ,  H04L1/00

CPC classification number: H04B1/0475 ,  H04B1/40 ,  H04B17/13 ,  H04B2001/0425 ,  H04L1/0042

Abstract: Apparatus and methods for transceiver calibration are provided. In certain configurations, a transceiver includes a transmit channel and an observation channel. The transmit channel includes a transmit mixer that up-converts a transmit signal by a first or transmit local oscillator frequency. The observation channel includes an observation mixer that down-converts an observed signal from the transmit channel by a second or observation local oscillator frequency that is offset from the first local oscillator frequency. By observing the transmit channel using a local oscillator frequency that is offset relative to the transmit channel's local oscillator frequency, the observation channel can observe transmit channel impairments substantially independently from observation channel impairments.

公开(公告)号：US09614557B1

公开(公告)日：2017-04-04

申请号：US14954857

申请日：2015-11-30

Applicant: Analog Devices, Inc.

Inventor： Christopher Mayer ,  David J. McLaurin ,  Chris Angell

IPC: H04B1/38 ,  H04L5/16 ,  H04B1/04 ,  H04L1/00 ,  H04B17/13

CPC classification number: H04B1/0475 ,  H04B1/40 ,  H04B17/13 ,  H04B2001/0425 ,  H04L1/0042

Abstract: A method and apparatus for phase adjustment of a RF transceiver is disclosed. Based on a first local oscillator signal and a second local oscillator signal, a beat signal that indicates the frequency and phase relationship between the first and second local oscillator signals can be generated. Using the beat signal, changing phase relationship between the first and second local oscillator signals can be cumulatively taken account for using phase averaging to allow quick restoration to observation of a previously observed channel.