Efficient estimation method for targets with arbitrary parameterised motion

An efficient parameter estimation method is proposed for manoeuvring targets with arbitrary parameterised motion. The core idea of the proposed method is based on a derived operation, namely, iterative scaled parametric correlation operation (ISPCO), which can directly present the two highest-order Doppler spread parameters in the two-dimensional parameter domain. By jointly applying ISPCO and dechirping operation, the motion parameters of different orders can be estimated iteratively without searching operation. The proposed method not only is computationally efficient, but also can achieve higher estimation accuracy and lower signal-to-noise ratio threshold than the popular methods based on recursive phase differentiation. Simulation results verify the validity of the proposed method.