eprintid: 10197176
rev_number: 6
eprint_status: archive
userid: 699
dir: disk0/10/19/71/76
datestamp: 2024-09-18 08:03:30
lastmod: 2024-09-18 08:03:30
status_changed: 2024-09-18 08:03:30
type: article
metadata_visibility: show
sword_depositor: 699
creators_name: Kang, S
creators_name: Han, K
creators_name: Hong, S
title: Sub-Nyquist Sampling OFDM Radar With a Time-Frequency Phase-Coded Waveform
ispublished: inpress
divisions: UCL
divisions: B04
divisions: F46
keywords: OFDM, Doppler radar, Bandwidth, Symbols, Signal resolution,
Doppler effect, Baseband
note: This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions.
abstract: This paper presents a time-frequency phase-coded sub-Nyquist sampling orthogonal frequency division multiplexing (PC-SNS-OFDM) radar system to reduce the analog-to-digital converter (ADC) sampling rate without any additional hardware or signal processing. The proposed radar divides the transmitted OFDM signal into multiple sub-bands along the frequency axis and provides orthogonality to these sub-bands by multiplying phase codes in both the time and frequency domains. Although the sampling rate is reduced by the factor of the number of sub-bands, the sub-bands above the sampling rate are folded into the lowest one due to aliasing. In the process of restoring the signals in folded sub-bands to those in full signal bands, the proposed PC-SNS-OFDM radar effectively eliminates symbolmismatch noise while introducing trade-offs in the range and Doppler ambiguities. The utilization of phase codes in both the frequency and time domains provides flexible control of the range and Doppler ambiguities. It also improves the signal-to-noise ratio (SNR) of detected targets compared to an earlier sub-Nyquist sampling OFDM radar system. This is validated with simulations and experiments under various sub-Nyquist sampling rates
date: 2024-06-27
date_type: published
publisher: Institute of Electrical and Electronics Engineers (IEEE)
official_url: http://dx.doi.org/10.1109/tvt.2024.3419899
oa_status: green
full_text_type: other
language: eng
primo: open
primo_central: open_green
verified: verified_manual
elements_id: 2297494
doi: 10.1109/TVT.2024.3419899
lyricists_name: Han, Kawon
lyricists_id: KHANC46
actors_name: Flynn, Bernadette
actors_id: BFFLY94
actors_role: owner
full_text_status: public
publication: IEEE Transactions on Vehicular Technology
issn: 0018-9545
citation:        Kang, S;    Han, K;    Hong, S;      (2024)    Sub-Nyquist Sampling OFDM Radar With a Time-Frequency Phase-Coded Waveform.                   IEEE Transactions on Vehicular Technology        10.1109/TVT.2024.3419899 <https://doi.org/10.1109/TVT.2024.3419899>.    (In press).    Green open access   
 
document_url: https://discovery.ucl.ac.uk/id/eprint/10197176/1/Sub-Nyquist_Sampling_OFDM_Radar_With_a_Time-Frequency_Phase-Coded_Waveform.pdf