中文说明：频谱稀缺是当前面临的主要问题之一
English Description：
Spectrum scarcity is one of the major issues faced in Wireless communication technology. Efficient spectrum utilization is of utmost importance to alleviate the problem of interference and reduced data rates. Cognitive Radios adapt themselves according to the available spectrum and thereby enhance transmission and reception of data, without affecting adjacent band users. The pre-requisite for such an objective is the precise calculation of spectrum boundaries Spectrum sensing is the basic and mandatory functionality in CR networks. In general, spectrum sensing techniques mainly include three types: energy detection, matched filter detection and cyclostationary feature detection. Energy detection has been widely used because it involves simple algorithms and does not require transcendent