Title :
Some physical layer issues of wide-band cognitive radio systems
Author_Institution :
ADAPTRUM Inc., Mountain, View, CA
Abstract :
Recent study by FCC spectrum policy task force (SPTF) found that while the available spectrum becomes increasingly scarce, the assigned spectrum is significantly underutilized. Cognitive radio technology holds the key promise to solve such problems. In this paper, we investigate some physical layer issues of wide-band cognitive radio systems. Specifically, we discuss the physical layer signal structure to support flexible operations required by wide-band cognitive radios. We analyze the performances of generalized power sensing and waveform sensing. And we study the adjacent channel interference mechanisms focusing on the interference caused by time-domain signal truncation
Keywords :
adjacent channel interference; broadband networks; frequency allocation; software radio; time-domain analysis; waveform analysis; FCC; Federal Communications Commission; SPTF; adjacent channel interference; power sensing; spectrum policy task force; time-domain signal truncation; waveform sensing; wide-band cognitive radio; Cognitive radio; FCC; Frequency; Interchannel interference; OFDM modulation; Performance analysis; Physical layer; RF signals; Signal processing; Ultra wideband technology;
Conference_Titel :
New Frontiers in Dynamic Spectrum Access Networks, 2005. DySPAN 2005. 2005 First IEEE International Symposium on
Conference_Location :
Baltimore, MD, USA
Print_ISBN :
1-4244-0013-9
DOI :
10.1109/DYSPAN.2005.1542630
