A Coherent Detection and Estimation Method for Weak Target with High Speed

This paper considers the detection and estimation problem for a weak target with multiple motion parameters. To eliminate the effect of model mismatch arising from the target's high-speed, the coherent integration (CI) methods formulate the model as a high-order polynomial or an accurate range evolving equation and obtain integration result in high-dimensional parameter space. However, the existing corresponding research on target detection and parameter estimation are considering the lower dimensional integration response. Therefore, based on the parameter searching CI methods, this paper proposes a new method for weak target to achieve detection and parameter estimation. The advantage of the proposed method lies in its ability to achieve target detection through high-dimensional integration distribution and to obtain precise multi-parameter estimation via Lagrange interpolation. Finally, the simulations are presented as a means of demonstrating the effectiveness of the proposed approach.