详细阐述了离散时间信号的傅里叶变换，能更好的理解四种傅里叶变换之间的关系，由其中一种怎么推导出另一种-Detailed discrete-time Fourier transform signal can be a better understanding of the relationship between the four types of Fourier transform, from one of how to derive an alternative

分析了在超宽带通信系统中的扩频干扰，并用两种通用的调制技术实现了对提出的抗干扰方法的仿真-he ultra wideband (UWB) interference to direct sequence spread spectrum (DSSS) receiver is analyzed. Two popular UWB modulation schemes, the time hopping pulse position modulat

This study proposes a novel near infrared face recognition algorithm based on a combination of both local and global features. In this method local features are extracted from partitioned images by means of undecimated discrete wavelet transform