2-D DOA estimation of LFM signal based on sub-nyquist sampling

Based on ESPRIT algorithm and integer search method, a two - dimensional DOA estimation algorithm is proposed for the LFM signal under sub-Nyquist sampling. A non-uniform L-type antenna array model is established, ESPRIT algorithm and integer search method are used to get the original signal azimuth and pitch angle information accurately. This algorithm can reduce the computational complexity effectively. Simulation results confirm its effectiveness.