The problem of classifying road vehicles according to vehicle type is considered. The proposed solution is based on using vehicle height and length and height profiles obtained by a microwave (MW) radar sensor. We show that if the radar sensor satisfies certain requirements, then a precise feature vector can be extracted, and simple deterministic algorithms can be applied to determine the vehicle class. Field trials using a spread-spectrum MW radar sensor system operating on these principles

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... e been carried out. They confirm that accurate classification of a large number of vehicle classes can be reached. ). R. Ragnarsson and P. Ridderström are with the Sensys Traffic AB, he is currently a Mathematician-Programmer. His research interests include signal processing and signal detection, parameter estimation, classification, localization, and tracking with applications to radar and bioacoustics.