earticle

영어

This paper addresses the estimation of carrier frequency for cyclostationary AM, BPSK, and QPSK signals in the presence of interfering signals and α-stable impulsive noise. The performance of conventional DFT algorithms suffers from severe degradation in impulsive noise environments. By fusing cyclostationarity and fractional lower-order statistics, we introduce a signal selective carrier frequency estimation algorithm for AM, BPSK, and QPSK signals. The new method exploits p th-order cyclostationarity property of signals in impulsive noise. Compared with the existing DFT algorithm, the new method is highly tolerant to interference, Gaussian and non-Gaussian impulsive noises. The performance of the new algorithm is studied using simulations in a variety of interference and noise conditions. Simulation results indicate that the proposed algorithm outperforms the conventional DFT method in impulsive noise.