针对在无线电监测和认知无线电系统中,信号参数估计这一重要问题,证明了OFDM信号具有循环平稳性的必要条件是加循环前缀或有非矩形脉冲成型,并以线性周期时变变换(LPTV)模型为基础,推导了OFDM信号的循环谱表达式-For radio monitoring and cognitive radio systems, signal parameter estimation of this important issue, the necessary condition for the OFDM sig

Performance analysis of Cyclostationarity basedSpectrum Sensing for Cognitive Radio Functionalities of a CR IEEE 802.22 : WRAN(Wireless Regional Area Network) The IEEE 802.22 standard relative to other IEEE 802 wireless data transmi