Multi-Carrier Wideband OCDM-Based THZ Automotive Radar

Bhattacharjee, S and Mishra, KV and Annavajjala, R and Murthy, CR (2023) Multi-Carrier Wideband OCDM-Based THZ Automotive Radar. In: UNSPECIFIED.

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Abstract

Automotive radars at the Terahertz (THz) frequency band have the potential to be compact and lightweight while providing high (nearly-optical) angular resolution. In this paper, we propose a bistatic THz automotive radar that employs the recently proposed orthogonal chirp division multiplexing (OCDM) multi-carrier waveform. As a standalone communications waveform, OCDM has been investigated for robustness against interference in time-frequency selective channels. The THz-band path loss, and, hence, radar signal bandwidth, are range-dependent. We address this unique feature through a multicarrier wideband OCDM sensing transceiver that exploits the coherence bandwidth of the THz channel. We develop an optimal scheme to combine the returns at different ranges/bandwidths by assigning weights based on the Cramér-Rao lower bound on the range and velocity estimates. Numerical experiments demonstrate improved target estimates that can be obtained using our proposed combined estimation from measurements with varied attenuation at THz bands. © 2023 IEEE.

Item Type:	Conference Paper
Publication:	ICASSP, IEEE International Conference on Acoustics, Speech and Signal Processing - Proceedings
Publisher:	Institute of Electrical and Electronics Engineers Inc.
Additional Information:	The copyright for this article belongs to author.
Department/Centre:	Division of Electrical Sciences > Electrical Communication Engineering
Date Deposited:	04 Mar 2024 09:32
Last Modified:	04 Mar 2024 09:33
URI:	https://eprints.iisc.ac.in/id/eprint/84349

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