Velocity error analysis of dual time interval Pulse-to-Pulse coherent Doppler sonar

As a Pulse-to-Pulse coherent Doppler sonar has advantages of quick-response and high degree of accuracy and precision, it becomes widely used in the laboratory and the sea. However, the occurrence of range and velocity ambiguities brings serious limitations on the more general applications of the sonar. One method to deal with the ambiguities is to implement a dual pulse interval method that can provide acceptable ambiguity velocity while requiring uncomplicated equipment. In this paper, three measurement error analyses are carried out. One is a theoretical analysis as one bound of measurement error. The second is a numerical analysis by simulations, and the last is experimental analysis in the laboratory. The results of the error analyses verified that the dual time interval pulse-to-pulse coherent Doppler sonar could enlarge the ambiguity velocity with high accuracy and precision.