Multiband Iterative Coherent Processing Method based on the ADMM Framework

Multiband radar bandwidth extrapolation is an effective way to broaden bandwidth, which can realize high resolution at low cost and is of great significance for the detection and identification of large-range unmanned aerial vehicle clusters. Due to system error and multiband measurement deviation, an incoherent factor is often present between multiband data, which has a negative effect on the quality of multiband fusion. This paper proposes a new method for multiband coherence process by making use of alternating direction method of multipliers algorithm and Levenberg-Marquardt iterative approach. The simulation and measured data are used to verify the proposed algorithm. The results show that compared with the traditional method, this method can improve the estimation accuracy.