Spectrum Sensing for Dynamic Spectrum Access of TV Bands (Invited Paper).pdfVIP

Spectrum Sensing for Dynamic Spectrum Access of TV Bands (Invited Paper) Carlos Cordeiro, Monisha Ghosh, Dave Cavalcanti, and Kiran Challapali Wireless Communication and Networking Department Philips Research North America Briarcliff Manor, NY 10510 {Carlos.Cordeiro, Monisha.Ghosh, Dave.Cavalcanti, Kiran.Challapali}@ Abstract – In this paper we address the issue of spectrum sensing secondary CRs have access rights for opportunistic usage in in cognitive radio based wireless networks. Spectrum sensing is spectrum white spaces on a non-interfering basis. the key enabler for dynamic spectrum access as it can allow A key building block in any CR system is the spectrum secondary networks to reuse spectrum without causing harmful sensing function, which consists of (a) sensing algorithms to interference to primary users. Here we propose a set of integrated quickly and robustly detect the presence of incumbent signals, medium access control (MAC) and physical layer (PHY) spectrum sensing techniques that provide reliable access to television (TV) and (b) well-designed coordination and communication bands. At the MAC level, we propose a two-stage spectrum protocols. Since incumbent users must be detected at a power sensing that guarantees timely detection of incumbents while level of an order of magnitude (or more) below thermal noise mee