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Transmitter noise considerations in super-Nyquist FMCW radar design

Ash, M; Brennan, PV; (2015) Transmitter noise considerations in super-Nyquist FMCW radar design. Electronics Letters , 51 (5) pp. 413-415. 10.1049/el.2014.4236. Green open access

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Abstract

A design consideration for super-Nyquist frequency modulated continuous-wave (FMCW) radar systems relating to transmitter to receiver noise leakage is introduced. Phase noise curves comparing the fundamental direct digital synthesisers frequency and its second super-Nyquist image show a significant increase in relative noise level at all offsets from the carrier. This results in a reduced transmitter signal-to-noise ratio. It is shown with a simple example that this can lead to a significant degradation in receiver sensitivity if not managed properly. A design rule-of-thumb that can be used by radar designers to avoid or mitigate this problem is provided.

Type: Article
Title: Transmitter noise considerations in super-Nyquist FMCW radar design
Open access status: An open access version is available from UCL Discovery
DOI: 10.1049/el.2014.4236
Publisher version: http://dx.doi.org/10.1049/el.2014.4236
Language: English
Additional information: © 2015 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.”
Keywords: FM radar, CW radar, thermal noise, radar receivers, radar transmitters, phase noise, direct digital synthesis, radar imaging, transmitter noise, super-Nyquist FMCW radar design, FMCW radar systems, receiver noise leakage, phase noise curves, direct digital synthesiser frequency, DDS frequency, super-Nyquist image, signal-to-noise ratio, receiver sensitivity, radar designers, frequency modulated continuous wave radar system
UCL classification: UCL
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Electronic and Electrical Eng
URI: https://discovery.ucl.ac.uk/id/eprint/1465494
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