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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...
From cognitive radio (CR) conception, a novel joint design of frequency and power adaptation for frequency-hopping spread spectrum (FHSS) system is developed based on truncated interference inversion algorithm. In the adaptation scheme, the interfering carrier frequencies are removed from frequency hopset firstly. Then the transmitter adjusts its power to compensate the effect of interference and...
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