基于认知无线电的超宽带信号频谱检测的研究

超宽带(UWB)系统会对窄带系统造成干扰，也会受到来自其他系统的强窄带干扰。将认知无线电频谱检测技术与UWB技术相结合，能使UWB和传统的窄带非认知无线设备实现共存并可提高UWB系统的性能。提出了超宽带认知无线电频谱感知基本原理，对现有的TH_PPM_UWB，PAM_DS_UWB，OFDM 3种UWB信号形式进行频谱分析，特别是引入应用在认知无线电中的循环相关检测对后2种信号进行了分析。仿真结果证明，该方法有良好的检测性能。

Spectrum sensing research of ultra wideband signals based on cognitive radio

UWB system caused interference to narrow-band system, and was interfered by powerful narrow band system. It will be true to achieve the coexistence of UWB and traditional narrow-band non-cognitive wireless devices, and to improve the performance of UWB system. The principles of UWB cognitive radio spectrum sensing was proposed. The papaer analyzes the spectrum of three forms of signals : TH_PPM_UWB, PAM_DS_UWB, and OFDM. Especially the introduction of the circulating detection was made when applied to cognitive radio,and it analyzed the two kinds of later signals. From the simulation results, this method has better detecting performance of the better detection performance.