Distributed spectrum sensing based on the Gabor time-frequency analysis for cognitive networks

Due to the independent design and development and the unexpected dynamics during deployment of co-existing networks and devices, the limited frequency spectrum will be extremely crowded for wireless sensor networks. Cognitive radio is an efficient approach for the opportunistic use of under-utilized spectrum since they are able to sense the spectrum and use frequency bands if no other user is detected. Once deployed, the automatic detection of transient interference is also a difficult problem for network setup. In this paper, we propose a Gabor analysis based algorithm for the spectrum sensing and transient interference detection problems. Simulation results and performance analysis are also presented.