【摘要】 为改善高阶谱相位数据时延估计算法的性能,研究了一种基于高阶谱的广义相位数据时延估计算法。该算法采用基于双谱的相干函数在高阶谱域对相位数据进行加权和加窗处理,以提高时延估计精度。最后用实测的直升机噪声信号进行了仿真,对各种相位数据时延估计算法性能进行了比较,验证了新算法的有效性。更多还原

【Abstract】 In order to improve the phase data time delay estimation performance,a polyspectrum-based generalized phase data time delay estimation algorithm is proposed in the paper.The new algo-rithm makes use of the bispectrum-based coherence function to weigh the higher order spectrum phase data along with windowing processing.The validity of the new algorithm is assessed by Monte Carlo simulations on the noise data generated by a helicopter.更多还原