On collaborative detection of TV transmissions in support of dynamic spectrum sharing

The problem of collaborative spectrum sensing by a group of unlicensed devices is considered in this paper. The problem is placed in the specific setting of identifying available TV channels for use by the unlicensed devices. The system model and analysis developed in the paper is applicable to a number of more general dynamic spectrum sharing scenarios. Through analysis and simulations, it is shown in the paper that collaboration among nodes leads to more efficient spectrum utilization from a system-level point of view, while decreasing computational complexity of detection algorithms at the individual sensing nodes