On RadCom channel capacity for V2V applications

TL;DR

The paper presents an analytical comparison of channel capacity for two ISAC-enabled vehicular approaches, IEEE 802.11bd in the 60 GHz band and RadCom, focusing on bumper-to-bumper platoon scenarios. It builds a Shannon-like capacity model and conducts numerical evaluations to quantify how bandwidth, subcarrier count, minimum frequency, noise figure, and duty cycle affect throughput. The results indicate that 802.11bd generally offers higher capacity when used solely for communications, while RadCom provides native sensing and can offload 5.9 GHz traffic, enabling ISAC benefits. The authors discuss system-level coexistence and conclude with guidance for future RadCom configurations and ISAC deployment strategies in V2X networks.

Abstract

The use of millimiter wave (mmWave) for communication and sensing purposes is one of the functions powered by Next Generation Vehicle-to-Anything (V2X) networks. The arrival of IEEE~802.11bd, which is able to operate in the 60 GHz band, opens the doors of Integrated Sensing and Communications (ISAC) to vehicular networks. Similarly, Radar-based Communications (RadCom) proposes the use of the radar spectrum for communication puproses. In this paper, we perform an analysis of the channel capacity for different configurations of RadCom, showing its potential to offload the V2X spectrum for bumper-to-bumper V2X applications. We finalize with a discussion on the potential for ISAC from both the 802.11bd and RadCom approaches.

Figures (2)

• Figure 1: Integrated Sensing and Communications between two heavy-duty vehicles.
• Figure 2: Channel capacity for different distances between nodes