这是一篇关于认知无线电频谱感知的文章，内有其详细的分析过程，感觉不错，特跟大家分享-This is an article on cognitive radio spectrum perceived the article, with its detailed analysis of the process, I feel pretty good, especially like to share with you

About UWB A co-basis is a special orthonormal basis, of the Hilbert function space, whose base functions are shape-invariant to Fourier transform except for phase shifts known a priori. A notable advantage of the co-basis orthonormal-expansion method

直接序列扩频超宽带信号产生程序，包括 单脉冲形成 ，BPM调制，DS扩频，脉冲成形发射(Direct sequence spread spectrum ultra wideband signal generator)