This paper analyzes the insufficiency which exists in the sequence randomness test by FFT and pre-sents a test method of sequence randomness based on time-frequency distribution(TFD).

• 分析了短时傅里叶变换(FFT)在序列随机性检验中存在的不足,提出了将时频联合分布(TFD)理论应用于序列随机性的检验中,并且对这种方法作了初步的研究。