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arXiv · 2509.01280

Multi-Representation Adapter with Neural Architecture Search for Efficient Range-Doppler Radar Object Detection

Zhiwei Lin·Weicheng Zheng·Yongtao Wang
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Abstract

Detecting objects efficiently from radar sensors has recently become a popular trend due to their robustness against adverse lighting and weather conditions compared with cameras. This paper presents an efficient object detection model for Range-Doppler (RD) radar maps. Specifically, we first represent RD radar maps with multi-representation, i.e., heatmaps and grayscale images, to gather high-level object and fine-grained texture features. Then, we design an additional Adapter branch, an Exchanger Module with two modes, and a Primary-Auxiliary Fusion Module to effectively extract, exchange, and fuse features from the multi-representation inputs, respectively. Furthermore, we construct a supernet with various width and fusion operations in the Adapter branch for the proposed model and employ a One-Shot Neural Architecture Search method to further improve the model's efficiency while maintaining high performance. Experimental results demonstrate that our model obtains favorable accuracy and efficiency trade-off. Moreover, we achieve new state-of-the-art performance on RADDet and CARRADA datasets with mAP@50 of 71.9 and 57.1, respectively.

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Zhiwei Lin, Weicheng Zheng, Yongtao Wang. 2025-09-01. Multi-Representation Adapter with Neural Architecture Search for Efficient Range-Doppler Radar Object Detection. https://arxiv.org/abs/2509.01280

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