【摘要】 研究乘性噪声均值先验知识未知情况下的谐波恢复问题。提出了基于一阶、二阶循环统计量的混合方法和基于一阶、三阶循环统计量的混合方法,即先利用一阶循环统计量得到对应非零均值乘性噪声的谐波频率,再求出与谐波频率对应的乘性噪声均值,去均值后用二阶或三阶循环统计量来恢复谐波。在此基础上,提出了谐波分量个数的估计方法。仿真结果证实了该方法的有效性。更多还原

【Abstract】 The problem of harmonic retrieval without priority of the mean values of multiplicative noise has been studied. The methods of the first-and second-order cyclic statistics-based (hybrid) and the first-and third-order cyclic statistics-based hybrid have been proposed. Using the first order cyclic (statistics), the frequencies of harmonics corresponding to nonzero mean multiplicative noise were (obtained).Then the mean of multiplicative noise can be (estimated). With this, harmonics can be (retrieved) by second or third order cyclic statistics. The estimation for harmonic numbers based on (different) order cyclic-moments are presented. Simulation results have confirmed the effectiveness of the algorithm.更多还原