Method for Floating Cars Sampling Cycle Optimization

Floating-car system has become a new way to collect real-time traffic data,which has many advantages such as high precision,large coverage area,etc.This paper has described the composing of floating-car system,presented a theoretical method for floating-car sampling cycle optimization: regarding speed as a stochastic signal,analyzed its frequency spectrum using fourier transform,and decided the optimal sampling frequency by Shannon sampling theory.The result shows that the optimal sampling frequency can acquire high data precision,which is suitable for practical application.