Non-linearity effects in PLL based automotive radar systems

F.G. Jansen; F. Laghezza

doi:10.23919/IRS.2018.8448096

Non-linearity effects in PLL based automotive radar systems

F.G. Jansen, F. Laghezza

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

Abstract

In LFMCW radar systems linearity of the frequency ramp is crucial to obtain a clean IF spectrum. PLL based frequency ramp generation is immune to temperature variations and thus provides a robust solution. However, being a closed loop system, the response of a PLL to a frequency ramp input will contain a transient. In this work it was found that this transient causes a single-sided l/f distortion in the IF spectrum. It was shown that the amount of distortion can be controlled by allowing some time for the PLL to settle and by changing the loop-bandwidth of the PLL.

Original language	English
Title of host publication	2018 19th International Radar Symposium, IRS 2018
Editors	Hermann Rohling
Place of Publication	Piscataway
Publisher	Institute of Electrical and Electronics Engineers
Number of pages	8
ISBN (Print)	978-3-7369-9545-1
DOIs	https://doi.org/10.23919/IRS.2018.8448096
Publication status	Published - 27 Aug 2018
Event	19th International Radar Symposium, IRS 2018 - Bonn, Germany Duration: 20 Jun 2018 → 22 Jun 2018

Conference

Conference	19th International Radar Symposium, IRS 2018
Country/Territory	Germany
City	Bonn
Period	20/06/18 → 22/06/18

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10.23919/IRS.2018.8448096

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title = "Non-linearity effects in PLL based automotive radar systems",

abstract = "In LFMCW radar systems linearity of the frequency ramp is crucial to obtain a clean IF spectrum. PLL based frequency ramp generation is immune to temperature variations and thus provides a robust solution. However, being a closed loop system, the response of a PLL to a frequency ramp input will contain a transient. In this work it was found that this transient causes a single-sided l/f distortion in the IF spectrum. It was shown that the amount of distortion can be controlled by allowing some time for the PLL to settle and by changing the loop-bandwidth of the PLL.",

author = "F.G. Jansen and F. Laghezza",

year = "2018",

month = aug,

day = "27",

doi = "10.23919/IRS.2018.8448096",

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editor = "Hermann Rohling",

booktitle = "2018 19th International Radar Symposium, IRS 2018",

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note = "19th International Radar Symposium, IRS 2018 ; Conference date: 20-06-2018 Through 22-06-2018",

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AU - Laghezza, F.

PY - 2018/8/27

Y1 - 2018/8/27

N2 - In LFMCW radar systems linearity of the frequency ramp is crucial to obtain a clean IF spectrum. PLL based frequency ramp generation is immune to temperature variations and thus provides a robust solution. However, being a closed loop system, the response of a PLL to a frequency ramp input will contain a transient. In this work it was found that this transient causes a single-sided l/f distortion in the IF spectrum. It was shown that the amount of distortion can be controlled by allowing some time for the PLL to settle and by changing the loop-bandwidth of the PLL.

AB - In LFMCW radar systems linearity of the frequency ramp is crucial to obtain a clean IF spectrum. PLL based frequency ramp generation is immune to temperature variations and thus provides a robust solution. However, being a closed loop system, the response of a PLL to a frequency ramp input will contain a transient. In this work it was found that this transient causes a single-sided l/f distortion in the IF spectrum. It was shown that the amount of distortion can be controlled by allowing some time for the PLL to settle and by changing the loop-bandwidth of the PLL.

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U2 - 10.23919/IRS.2018.8448096

DO - 10.23919/IRS.2018.8448096

M3 - Conference contribution

AN - SCOPUS:85053597390

SN - 978-3-7369-9545-1

BT - 2018 19th International Radar Symposium, IRS 2018

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PB - Institute of Electrical and Electronics Engineers

CY - Piscataway

T2 - 19th International Radar Symposium, IRS 2018

Y2 - 20 June 2018 through 22 June 2018

ER -

Non-linearity effects in PLL based automotive radar systems

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