An dealiasing method for pulse-to-pulse coherent Doppler velocimetry using combining time delay estimation and artificial delay

An improved dealiasing method is proposed to do the cancellation of the velocity ambiguities in the pulseto-pulse coherent Doppler velocimetry. By dividing the velocity space into a series of velocity regions with an interval of two-fold maximum measurable velocity, the measurement of a velocity is turned into the determination of its region and the estimation of its offset velocity in the region. With a combining "correlation-phase" time delay estimation method, non-ambiguous velocity results are achieved. An artificial time delay method is further proposed to cancel the possible velocity jumping near the boundaries of the velocity regions. Compared with the traditional dealiasing methods, tile proposed one only needs several computations for different artificial delays, instead of taking multiple measurements. And it is not limited by the velocity range theoretically. Simulations and experiments are also conducted to verify the effectiveness of the proposed method.