提出了一种基于正交频分复用系统的最大多普勒频移盲估计算法.利用恒包络调制的子载波,在接收端获得这些子载波的幅值后按经典周期图法估计其功率谱密度(PSD)的幅值.最大多普勒频移通过获取功率谱密度的分界点位置得到.不同于传统的功率谱密度方法,本算法不需要信道响应的估计值,并且估计精度也有所提高.仿真结果表明,本算法有较好的鲁棒性,在大范围内的多普勒频移下都能保持高估计精度. A maximum Doppler shift blind estimation algorithm based on Orthogonal Frequency Division Multiplexing (OFDM) system is proposed.Using constant envelope modulated subcarriers, the amplitude of these subcarriers is obtained at the receiving end, and then estimated according to the classical periodic graph method Power Spectral Density (PSD) Amplitude The maximum Doppler shift is obtained by taking the position of the cutoff point of the power spectral density Unlike the traditional power spectral density method, this algorithm does not require an estimate of the channel response and the estimation accuracy is also The simulation results show that the proposed algorithm has better robustness and can maintain the high estimation accuracy under the large range of Doppler shift.