Evaluation Of Orthogonal Chirp Division Multiplexing For Automotive Integrated Sensing And Communications

TL;DR

This paper evaluates the use of orthogonal chirp division multiplexing (OCDM) in a bistatic vehicular integrated sensing and communications system, demonstrating its robustness and efficiency in high-resolution radar and communication tasks.

Contribution

It introduces the SUNDAE algorithm for joint symbol decoding and radar parameter estimation in OCDM-based ISAC systems, with derived statistical bounds and performance comparisons.

Findings

SUNDAE achieves high target resolution and communication rates.

OCDM outperforms other multicarrier waveforms in interference robustness.

The proposed algorithms are validated through numerical experiments.

Abstract

We consider a bistatic vehicular integrated sensing and communications (ISAC) system that employs the recently proposed orthogonal chirp division multiplexing (OCDM) multicarrier waveform. As a stand-alone communications waveform, OCDM has been shown to be robust against the interference in time-frequency selective channels. In a bistatic ISAC, we exploit this property to develop efficient receive processing algorithms that achieve high target resolution as well as high communications rate. We derive statistical bounds for our proposed Sequential symbol decoding and radar parameter estimation (SUNDAE) algorithm and compare its competitive performance with other multicarrier waveforms through numerical experiments.