MulDar: Unleashing the Potential of Distributed COTS mmWave Radar by Exploiting Cross-Device Channels

Created in April 04, 2026

2026   ·   mmWave

Millimeter-wave (mmWave) radar is an indispensable sensor for autonomous systems, particularly in self-driving vehicles and smart home applications. Its wide bandwidth provides fine-grained resolution, while its resilience to adverse lighting and weather conditions makes it suitable for robust perception.

Despite its widespread adoption, a fundamental limitation of conventional mmWave radar threatens its reliability in practical deployments: specular reflection. In this post, I want to share our recent work on MulDar, a system that attempts to address this limitation by leveraging distributed, commercial-off-the-shelf (COTS) radars to capture cross-device channels.

The Promise of Multi-Static Radar

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