DTV spectrum sensing with pilot tone filtering

In cognitive radio communication technique, unlicensed users monitor the existence and availability of licensed (primary) user´s spectrum and attempt to exploit it when the primary users don´t use their spectrum. In this technique, an effective spectrum sensing is very crucial for not to disturb primary user. One of the most effective spectrum sensing approaches is pilot tone detection. In many licensed digital cellular communication systems, pilot tone transmitting is preferred for its some advantages over channel estimation, synchronization, etc. In this paper, an effective pilot tone detection method is proposed. In the proposed method, Goertzel Algorithm is used in this pilot tone detection and pilot tones have been detected correctly on actual DTV signal records. Proposed method provides fast and more efficient spectrum sensing capabilities.