A Heterodyne 77-GHz FMCW Radar with Offset PLL Frequency Stabilization

Reinhard Feger; Erich Kolmhofer; Florian Starzer; Friedrich Wiesinger; Stefan Scheiblhofer; Andreas Stelzer

A Heterodyne 77-GHz FMCW Radar with Offset PLL Frequency Stabilization

Reinhard Feger, Erich Kolmhofer, Florian Starzer, Friedrich Wiesinger, Stefan Scheiblhofer, Andreas Stelzer

Department of RF-Systems

Research output: Chapter in Book/Report/Conference proceeding › Conference proceedings › peer-review

Abstract

This contribution describes the realization of a heterodyne frequency-modulated continuous-wave (FMCW) radar system operating in the frequency band from 76 GHz to 77 GHz. To implement the heterodyne principle two voltage controlled oscillators (VCOs) are operated in order to produce frequency ramp signals with a fixed frequency offset. This allows to mitigate effects occurring in homodyne systems like, e.g., DC-offsets or low-frequency noise components. To avoid large divider values in the control loop the presented system is based on an offset phase-locked-loop configuration. In the presented implementation the same downconverter is used to implement the offset-loop for both VCOs, which has the positive effect that errors and noise influences in the downconversion process—at least partly—cancel out in the final FMCW output signal.

Original language	English
Title of host publication	Digest to the IEEE Topical Conference on Wireless Sensor and Sensor Networks
Editors	IEEE
Pages	9-12
Number of pages	4
Publication status	Published - Jan 2011

Fields of science

202019 High frequency engineering
202033 Radar technology

JKU Focus areas

Mechatronics and Information Processing

Cite this

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title = "A Heterodyne 77-GHz FMCW Radar with Offset PLL Frequency Stabilization",

abstract = "This contribution describes the realization of a heterodyne frequency-modulated continuous-wave (FMCW) radar system operating in the frequency band from 76 GHz to 77 GHz. To implement the heterodyne principle two voltage controlled oscillators (VCOs) are operated in order to produce frequency ramp signals with a fixed frequency offset. This allows to mitigate effects occurring in homodyne systems like, e.g., DC-offsets or low-frequency noise components. To avoid large divider values in the control loop the presented system is based on an offset phase-locked-loop configuration. In the presented implementation the same downconverter is used to implement the offset-loop for both VCOs, which has the positive effect that errors and noise influences in the downconversion process—at least partly—cancel out in the final FMCW output signal.",

author = "Reinhard Feger and Erich Kolmhofer and Florian Starzer and Friedrich Wiesinger and Stefan Scheiblhofer and Andreas Stelzer",

year = "2011",

month = jan,

language = "English",

pages = "9--12",

editor = "IEEE",

booktitle = "Digest to the IEEE Topical Conference on Wireless Sensor and Sensor Networks",

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T1 - A Heterodyne 77-GHz FMCW Radar with Offset PLL Frequency Stabilization

AU - Feger, Reinhard

AU - Kolmhofer, Erich

AU - Starzer, Florian

AU - Wiesinger, Friedrich

AU - Scheiblhofer, Stefan

AU - Stelzer, Andreas

PY - 2011/1

Y1 - 2011/1

N2 - This contribution describes the realization of a heterodyne frequency-modulated continuous-wave (FMCW) radar system operating in the frequency band from 76 GHz to 77 GHz. To implement the heterodyne principle two voltage controlled oscillators (VCOs) are operated in order to produce frequency ramp signals with a fixed frequency offset. This allows to mitigate effects occurring in homodyne systems like, e.g., DC-offsets or low-frequency noise components. To avoid large divider values in the control loop the presented system is based on an offset phase-locked-loop configuration. In the presented implementation the same downconverter is used to implement the offset-loop for both VCOs, which has the positive effect that errors and noise influences in the downconversion process—at least partly—cancel out in the final FMCW output signal.

AB - This contribution describes the realization of a heterodyne frequency-modulated continuous-wave (FMCW) radar system operating in the frequency band from 76 GHz to 77 GHz. To implement the heterodyne principle two voltage controlled oscillators (VCOs) are operated in order to produce frequency ramp signals with a fixed frequency offset. This allows to mitigate effects occurring in homodyne systems like, e.g., DC-offsets or low-frequency noise components. To avoid large divider values in the control loop the presented system is based on an offset phase-locked-loop configuration. In the presented implementation the same downconverter is used to implement the offset-loop for both VCOs, which has the positive effect that errors and noise influences in the downconversion process—at least partly—cancel out in the final FMCW output signal.

UR - http://www.radiowirelessweek.org/WiSNet2011/

M3 - Conference proceedings

SP - 9

EP - 12

BT - Digest to the IEEE Topical Conference on Wireless Sensor and Sensor Networks

A2 - IEEE, null

ER -

A Heterodyne 77-GHz FMCW Radar with Offset PLL Frequency Stabilization

Abstract

Fields of science

JKU Focus areas

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