Smoothed Phase-Coded FMCW: Waveform Properties and Transceiver Architecture

Smoothed phase-coded frequency modulated continuous waveform (SPC-FMCW), which is aimed to improve the coexistence of multiple radars operating within the same frequency bandwidth, is studied, and the receiving strategy with a low analog-to-digital converter sampling requirement is investigated. The...

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Bibliographic Details
Published in:IEEE transactions on aerospace and electronic systems 2023-04, Vol.59 (2), p.1720-1737
Main Authors: Kumbul, Utku, Petrov, Nikita, Vaucher, Cicero S., Yarovoy, Alexander
Format: Article
Language:English
Subjects:
Analog to digital converters
Automotive radar
Bandwidth
Codes
Decoding
Delays
Encoding
Frequency modulation
Gaussian minimum shift keying (GMSK)
Gaussian smoother
mutual orthogonality
phase coding
Phase lag
Phase transitions
phase-coded frequency-modulated continuous waveform (PC-FMCW)
Radar
Sensors
Waveforms
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Summary:Smoothed phase-coded frequency modulated continuous waveform (SPC-FMCW), which is aimed to improve the coexistence of multiple radars operating within the same frequency bandwidth, is studied, and the receiving strategy with a low analog-to-digital converter sampling requirement is investigated. The Gaussian filter is applied to obtain smooth waveform phase transitions, and then, quadratic phase lag compensation is performed before waveform transmission to enhance decoding. The proposed waveform is examined in different domains, and its waveform properties are analyzed theoretically and demonstrated experimentally. Both simulation and experimental results show that the introduced waveform with the investigated processing steps helps combine all advantages of the FMCW waveform, including hardware simplicity and small operational bandwidth of the receiver, with the advantages of phase coding.
ISSN:0018-9251
1557-9603
DOI:10.1109/TAES.2022.3206173