MmWave-LoRadar Empowered Vehicular Integrated Sensing and Communication Systems: LoRa Meets FMCW

TL;DR

This paper introduces mmWave-LoRadar, a novel integrated sensing and communication system combining LoRa and FMCW radar in the mmWave band, enhancing vehicular sensing and communication with innovative hardware and signal processing solutions.

Contribution

It presents a new ISAC system integrating LoRa with FMCW radar, addressing dual discontinuity issues with specialized hardware and compressed sampling techniques.

Findings

Effective mitigation of dual discontinuity issues.

Reduced hardware complexity with low-rate sampling.

Superior performance in vehicular sensing and communication simulations.

Abstract

The integrated sensing and communication (ISAC) technique is regarded as a key component in future vehicular applications. In this paper, we propose an ISAC solution that integrates Long Range (LoRa) modulation with frequency-modulated continuous wave (FMCW) radar in the millimeter-wave (mmWave) band, called mmWave-LoRadar. This design introduces the sensing capabilities to the LoRa communication with a simplified hardware architecture. Particularly, we uncover the dual discontinuity issues in time and phase of the mmWave-LoRadar received signals, rendering conventional signal processing techniques ineffective. As a remedy, we propose a corresponding hardware design and signal processing schemes under the compressed sampling framework. These techniques effectively cope with the dual discontinuity issues and mitigate the demands for high-sampling-rate analog-to-digital converters while achieving good performance. Simulation results demonstrate the superiority of the mmWave-LoRadar ISAC system in vehicular communication and sensing networks.