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.