一种基于短时傅立叶变换软件解调的快速算法

Short - time Fourier Transform Based Software Demodulation Recursive Algorithm

提出一种基于短时傅立叶变换(STFT)软件解调的快速算法——基于全极点窗的递归算法,给出算法的理 论及解调流程,并通过仿真给出软件解调中全极点窗函数参数的选择结果。还讨论了几种不同的窗函数对解调性能的 影响,给出不同信噪比下的仿真结果。仿真结果表明,全极点窗递归算法解调效果良好。

This paper presents a fast algorithm in software demodulation based on Short-time Fourier Transform recursive algorithm. The theory of the algorithm and the flow of demodulation are proposed. Also it gives the choice of the parameters of all-pole moving-window in software demodulation viasimulation. The effect of different windows is discussed. The simulative results of this demodulation under different signal-to-noise ratio ( SNR) are presented. The simulation results indicate that the recursive algorithm based on all-pole moving window is effective.