Resolving Velocity Ambiguity Based on Robust Chinese Remainder Theorem for Multi-Frequency Pulse-to-Pulse Coherent Doppler Sonar

Multi-frequency pulse-to-pulse coherent Doppler sonars are able to measure velocities beyond the ambiguity limit of conventional single-frequency systems. Resolving this velocity ambiguity is essential for such multi-frequency pulse-to-pulse coherent sonars. This paper proposes to employ the robust Chinese remainder theorem to resolve velocity ambiguity in such a system. The simulations show that our proposed method is able to reduce the trial fail rate of velocity estimation by one order of magnitude, as compared to the method available in the literature.