摘要： 针对正交频分复用(OFDM)信号子载波数估计的问题，利用OFDM信号的高斯性，提出一种基于KS距离的子载波数估计法。侦收端DFT模块输出的KS距离在DFT点数与发射端匹配时最小。理论分析及仿真结果证明，该方法能区分高斯分布与非高斯分布，正确估计OFDM信号的子载波数。

关键词: KS检验, 子载波数估计, 正交频分复用, 经验分布函数, 盲估计

Abstract: In order to achieve the sub-carrier number estimation of Orthogonal Frequency Division Multiplexing(OFDM) signal, a method based on Kolmogorov-Simirnov(KS) test statistics is proposed for normality test. It is proved that the Gaussianity of DFT processor output on reconnaissance terminal is weak when DFT points match with that of transmitter. The results of simulation and analysis show the method can be employed to distinguish Gaussian signal from non-Gaussian signal, and achieve sub-carrier number estimation of OFDM.

Key words: Kolmogorov-Simirnov(KS) test, sub-carrier number estimation, Orthogonal Frequency Division Multiplexing(OFDM), Empirical Distribution Function(EDF), blind estimation

中图分类号: 

• TN911.72