Collaborative spectrum sensing in real cognitive radio network

Collaborative spectrum sensing through coalition games among secondary users (SU) in cognitive environment is implemented to provide better performance than traditional fusion center based centralized cooperative spectrum sensing. In this paper, collaborative spectrum sensing have been designed and implemented on Wireless Open-Access Research Platform (WARP) to study its performance on real wireless cognitive environment. The WARP has been used for energy detection based spectrum sensing of primary user (PU), and a separate reporting channel has been designed to transfer the local sensing bits to a cluster head (CH) selected through distributed coalition games. In addition, through WARP implementation the inherent tradeoff has been shown between the gains in terms of probability of detection of PU and the costs in terms of false alarm probability.