A Novel Dynamic Spectrum Hole Sensing Scheme

A novel dynamic spectrum hole sensing scheme is developed for the chirp signal. A narrow band energy detector combined with frequency scanner is used for achievement of the basic spectrum occupied scene. The Kalman filter predicts the instantaneous frequency and energy of chirp signal. Based on the predict results, the CR user can exploit the spectrum hole of chirp signal and coexist with chirp signal system. Simulation results show that the narrow band energy detection combined with frequency scanner can sense the primary signal scene coarsely which is enough for judgment the subchannel´s occupancy. Meanwhile, the Kalman filter can predict the chirp signal´s parameter precisely.