A digital post-distortion technique for noncontact accurate movement measurement using interferometric radar

Changzhan Gu, Changzhi Li

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

Signal distortion may happen in conventional accoupled interferometric radar when measuring slow target movements. Existing solutions to preserve signal integrity add to hardware complexity and are at extra cost. In this paper, a digital post-distortion (DPD) technique is proposed to compensate the signal distortion in baseband digital domain. For the first time, at no extra hardware cost, an ac-coupled interferometric radar can be used to measure slow movements without losing any signal information-even those with stationary moment. The DPD technique is realized by applying a compensation function, which is the inverse of the baseband system response and obtained in hardware calibration, to the digitized baseband I/Q signals. Both simulation and experimental results show that the proposed technique is robust to recover distorted signals.

Original languageEnglish
Title of host publication2015 IEEE MTT-S International Microwave Symposium, IMS 2015
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9781479982752
DOIs
StatePublished - Jul 24 2015
EventIEEE MTT-S International Microwave Symposium, IMS 2015 - Phoenix, United States
Duration: May 17 2015May 22 2015

Publication series

Name2015 IEEE MTT-S International Microwave Symposium, IMS 2015

Conference

ConferenceIEEE MTT-S International Microwave Symposium, IMS 2015
CountryUnited States
CityPhoenix
Period05/17/1505/22/15

Keywords

  • Interferometric radar
  • compensation
  • distortion
  • post-distortion
  • signal integrity

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