2-D HARMONIC RETRIEVAL IN MULTIPLICATIVE AND ADDITIVE NOISE BASED ON CHIRP Z-TRANSFORM

The two-dimensional (2-D) harmonic retrieval method in multiplicative and additive noise based on 2-D chirp z-transform (CZT) is discussed in this paper. Unlike 2-D FFT, the 2-D CZT can improve the spectral resolution without increasing the size of the observation data and fine the spectra of 2-D harmonics in multiplicative and additive noise. Hence, the resolution and accuracy of the 2-D harmonic retrieval method based on 2-D CZT are higher than that of based on 2-D FFT. Simulation results are provided to verify the effectiveness of the proposed method