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Dynamic Spectrum Access (DSA) is receiving considerable interest as a means to improve spectral usage in licensed bands. In order to avoid interference to licensed users, spectrum sensing has emerged as an enabling technology for DSA. The requirements for spectrum sensors are stringent, as licensed user detection must be performed reliably at low signal-tonoise ratios (SNR). Sensing performance can be improved by exploiting signal features not present in the background noise. These approachesdoi:10.1109/twc.2011.101211.110665 fatcat:6g4yy4kzxzgntil6mrxxgtyqqy