Publication: IEICE TRANSACTIONS on Communications Publication Date: 2012/04/01 Vol. E95-BNo. 4pp. 1056-1065 Type of Manuscript: Special Section PAPER (Special Section on Cognitive Radio and Heterogeneous Wireless Networks in Conjunction with Main Topics of CrownCom2011) Category: Keyword: compressive sensing, power spectral density (PSD) map, cognitive radio users (CRU),