关键词: 脉冲噪声, 衰落信道, 参数估计, 符号周期, 分数低阶循环平稳性

Abstract:

In order to solve the problem of the difficulty in blind estimation of the symbol period for Multiple phase-shift keying (MPSK) signals over fading channels under impulsive noise environment, a novel symbol period blind estimation method based on the fractional low order cyclic correlation coefficient is proposed. First, the analytical expressions for the fractional low-order cyclic stationary characteristic are derived by using the cyclostationarity of MPSK. And then, the relationship between symbol period of MPSK signals and fractional low-order cyclic spectral coherence function is presented. Finally, the process of the symbol period estimation method for MPSK is constructed. Simulation results show that the proposed method has a good estimation performance over fading channels under impulsive noise environment.

Key words: impulsive noise, fading channels, parameter estimation, symbol period, fractional low-order cyclic stationary