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)
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 sp...