DC-coupled Doppler radar sensor with software-configured fine-tuning architectures for precise monitoring of complex motion patterns

Yihong Yang, Changzhan Gu, Richard Gale, Jinghong Chen, Changzhi Li

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

2 Scopus citations

Abstract

In most of the traditional miniature Doppler radar systems, AC coupling is used between the RF front-end and baseband amplifier. However, the AC coupling can lose very low frequency and DC information, which represent the stationary moment when detecting the movement of the object under test. Although a larger coupling capacitor can alleviate the problem to some extent, it will slow down the system response by increasing the settling time. DC-coupled radar sensors using fine-tuning architectures are proposed in this paper to preserve the DC information. This solution is realized for both on-chip design and board-level design. In the on-chip design, a two-stage variable gain amplifier (VGA) with software-configured DC tuning is proposed. In the board-level design, the AC coupling capacitors are removed and an adaptive feedback loop is used to perform DC offset calibration. Simulations and experiments show that the proposed DC-tuning architectures can completely relieve the radar sensor from circuit saturation and allow it to accurately monitor motions with stationary moments.

Original languageEnglish
Title of host publication2012 IEEE 13th Annual Wireless and Microwave Technology Conference, WAMICON 2012
DOIs
StatePublished - 2012
Event2012 IEEE 13th Annual Wireless and Microwave Technology Conference, WAMICON 2012 - Cocoa Beach, FL, United States
Duration: Apr 15 2012Apr 17 2012

Publication series

Name2012 IEEE 13th Annual Wireless and Microwave Technology Conference, WAMICON 2012

Conference

Conference2012 IEEE 13th Annual Wireless and Microwave Technology Conference, WAMICON 2012
Country/TerritoryUnited States
CityCocoa Beach, FL
Period04/15/1204/17/12

Keywords

  • AC coupling
  • DC coupling
  • DC offset
  • DC tuning
  • Doppler radar
  • displacement measurment
  • variable gain amplifier

Fingerprint

Dive into the research topics of 'DC-coupled Doppler radar sensor with software-configured fine-tuning architectures for precise monitoring of complex motion patterns'. Together they form a unique fingerprint.

Cite this