Self-adaptive echo signal processing method for pulse radar ranging system

Self-adaptive echo signal processing method for high precision level measurement system is presented in this paper. The algorithm proposed in this paper include the steps of identifying the target reflect surface echo by extracting and evaluating characteristic values from possible rising edges without reference curve, and the steps of fitting a branch of a parabola to a selected portion of the leading edge and determining the temporal position of the fitted parabola on the temporal axis. The method has been tested under practical field scenarios, which contain multi-path effects and clutter object interference. Results show that compared with the conventional method, the new method offers a higher accuracy in range calculation, while retaining a robust immunity to interference.