TY - JOUR T1 - Deep Out-of-Band Radiation Reduction By Using Joint Filterbank and Cancellation Carriers in Cognitive Radios TT - JF - ITRC JO - ITRC VL - 5 IS - 2 UR - http://ijict.itrc.ac.ir/article-1-156-en.html Y1 - 2013 SP - 19 EP - 26 KW - Filter-bank KW - cancellation carrier KW - deep spectral mask KW - out-of-band radiation KW - cognitive radio N2 - A deep spectrum sculpting is necessary to enable coexistence between a cognitive radio (CR) user and a licensed user which has low dynamic range and is susceptible to interferences. In this paper, we propose to use joint filter-bank based multicarrier system and cancellation carriers to guarantee an almost free out-of-band interference transmission and keep the quality of services of licensed adjacent bands unchanged. We investigate the performance of the proposed method with different well-known existing methods from viewpoints of the average level of out-ofband power, spectral efficiency, and computational complexity. M3 ER -