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Research on vehicle speed estimation method based on microphone array

In order to address the problems of high cost, inconvenient installation and susceptibility to weather conditions of existing vehicle speed measurement methods, this paper presents a novel differential beamforming-based vehicle speed measurement method, which applies differential microphone array beamforming techniques for vehicle speed measurement with better robustness in real-world environments. To evaluate the performance of the method on vehicle speed estimation, we conducted field experiments. The experimental results show that the method proposed in this paper has a lower cost of implementation and reduced computational complexity. Our algorithm produced better accuracy and performance in vehicle speed measurement (VSM).