Improve Radar Sensing Performance of Multiple Roadside Units Cooperation via Space Registration

TL;DR

This paper introduces a cooperative radar sensing network of multiple roadside units with a novel spatial registration method that uses adjustable beams to align sensing areas, enhancing traffic environment perception.

Contribution

It proposes an adjustable beam enabled spatial registration algorithm and a beamwidth adjustable beamforming technique for improved RSU cooperation in radar sensing.

Findings

AB-SRA achieves near-perfect spatial registration.

The beamforming algorithm provides flexible sensing area adjustment.

Simulation results validate the effectiveness of the proposed methods.

Abstract

Roadside units (RSUs) can help vehicles sense the traffic environment, so as to improve traffic safety. Since the sensing capability of single RSU is limited, we propose a multiple RSUs cooperative radar sensing network (RSU-CRSN) with signal-level fusion technique. Spatial registration is an essential prerequisite and foundation for RSU-CRSN with signal-level fusion. In this paper, we present an adjustable beam enabled spatial registration algorithm (AB-SRA) that makes the sensing area of each RSU coincide by adjusting the sensing beam width of RSU. To adjust the width of sensing beam flexibly, a beamwidth adjustable beamforming algorithm (BABA) is proposed in this paper. Simulation results show that the performance of AB-SRA is close to perfect spatial registration.