NOVEL SPECTRUM SENSING METHOD BASED ON THE SPATIAL SPECTRUM FOR COGNITIVE RADIO SYSTEMS  

作　　者：Lu Guangyue Wang Yingxi Xie Kai Yang Xiaoni 

机构地区：[1]Electronics and Information College,Yangtze University,Jingzhou 434023,China [2]School of Telecommunication and Information Engineering,Xi’an University of Posts and Telecommunications,Xi’an 710061,China

出　　处：《Journal of Electronics(China)》2010年第5期625-629,共5页电子科学学刊（英文版）

基　　金：Supported by the National Natural Science Foundation of China (No. 60602053);Program for New Century Excellent Talents in University (NCET-08-0891);the Natural Science Foundation of Shaanxi Province (2010JQ80241);the Natural Science Foundation of Hubei Province (2009 CDB308);the Fund from Education Department of Shaanxi Government (2010JK836)

摘　　要：Spectrum sensing is the key problem for Cognitive Radio(CR) systems.A method based on the Peak-to-Average Amplitude-Ratio(PAAR) of the Spatial Spectrum(SS) of the received signals is proposed to sense the available spectrum for the cognitive users with the help of the multiple antennas at the receiver of the cognitive users.The greatest advantage of the new method is that it requires no information of the noise power and is free of the noise power uncertainty.Both the simulation and the analytical results show that the proposed method is robust to noise uncertainty,and greatly outperform the classical Energy Detector(ED) method.Spectrum sensing is the key problem for Cognitive Radio（CR） systems.A method based on the Peak-to-Average Amplitude-Ratio（PAAR） of the Spatial Spectrum（SS） of the received signals is proposed to sense the available spectrum for the cognitive users with the help of the multiple antennas at the receiver of the cognitive users.The greatest advantage of the new method is that it requires no information of the noise power and is free of the noise power uncertainty.Both the simulation and the analytical results show that the proposed method is robust to noise uncertainty,and greatly outperform the classical Energy Detector（ED） method.

关 键 词：Spectrum sensing Spatial Spectrum (SS) Cognitive Radio (CR) Peak-to-Average Amplitude-Ratio (PAAR) 

分 类 号：TN911.23[电子电信—通信与信息系统]