Feasibility of Guard Band Utilization for Cognitive Radio Using TV White Space

Noriyuki YAGINUMA  Masahiro UMEHIRA  Hiroshi HARADA  

IEICE TRANSACTIONS on Communications   Vol.E97-B   No.2   pp.343-349
Publication Date: 2014/02/01
Online ISSN: 1745-1345
DOI: 10.1587/transcom.E97.B.343
Print ISSN: 0916-8516
Type of Manuscript: Special Section PAPER (Special Section on Technologies for Effective Utilization of Spectrum White Space)
Cognitive Radio,  White Space,  ISDB-T,  Guard Band,  

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In cognitive radio systems using TV white space, it is desirable to secure a control channel to exchange the wireless network control information and to secure minimum frequency resource for secondary user communications if TV white space is unavailable. In order to satisfy these requirements, this paper proposes guard band utilization, which aggregates the multiple guard bands between digital TV signals and uses them for a control channel and/or a communication channel. To investigate the feasibility of the proposed scheme, this paper evaluates the performance degradation of the digital TV signals when the guard band is used. Furthermore, it discusses the permissible transmitting power and occupied bandwidth of the guard band signals to avoid the harmful interference to the digital TV signals.