A Cognitive Radio Receiver Supporting Wide-Band Sensing

Volker BLASCHKE, Tobias RENK, Friedrich K. JONDRAL
2009 Wireless Sensor Network  
The specification of IEEE 802.22 defines the world-wide first cognitive radio (CR) standard. Within a range of 40 MHz to 910 MHz CR systems are allowed to allocate spectrum besides the currently established radio services like radio and TV broadcasting. In order to fulfill the regulative guidelines of interference limitations, a capable spectral sensing and user detection has to be provided. Due to the wide frequency range specified in IEEE 802.22 and the high dynamic range of signals allocated
more » ... f signals allocated in this band there are high demands on the CR receiver's front-end. Especially the performance requirements on analog-to-digital converters increase significantly compared to current wireless systems. Based on measurements taken in this frequency range requirements to CR's ADCs are figured out. Furthermore, the measurement results are analyzed regarding expectable allocation scenarios and their impacts to spectral sensing. Derived from this results and a comparison of general spectral sensing mechanisms an approach for a CR receiver supporting wide-band sensing is presented. Considering the apriori information resulting from scenario analysis and including adapted information processing in the terminal the ADC's performance requirements can be reduced.
doi:10.4236/wsn.2009.13018 fatcat:hg2qi6bgpncu3dvgka3lcwt3g4