|Cooperative Spectrum Sensing- Diversity and Error Exponent Analyses
Liuqing Yang, Colorado State University
Monday, April 2, 2012
4:00 p.m., room 223, Weber Bldg
Cooperative spectrum sensing is widely adopted in cognitive radio networks. Although various cooperative schemes have been developed to enhance the spectrum sensing performance, the fundamental cooperation gain has never been quantified. In this talk, we will use the concept of diversity as the performance metric to quantify the cooperation gain and accordingly design cooperative spectrum sensing strategies for both soft and hard information fusion. Interesting tradeoffs between the system reliability and efficiency will be illustrated. In addition, we will develop an asymptotical joint optimum hard information fusion strategy based on the large deviation analysis on the error exponent. The connection between diversity and error exponent analyses will also be revealed.