Simple interpolation technique for the DFT for joint system parameters estimation in burst MPSK transmissions

In burst-mode digital transmission, carrier synchronization is a key technique in the coherent-demodulation of multiphase-shift key (MPSK) signals and is directly related to the specification to demodulation. The algorithm of estimating carrier frequency and phase was proposed by a simple frequency domain interpolation technique for discrete Fourier transform (DFT). The algorithm can significantly improve the frequency and phase resolution capabilities of the DFT without increasing its data size. The principle and performance of the algorithm was analyzed and the result of simulation was given.