Figure 7From: Spectrum sensing and resource allocation for multicarrier cognitive radio systems under interference and power constraintsCapacity of a CR in a spectral gap between two PUs versus PU SNR. PI algorithm used for power allocation (a) Ideal model, (b) Rapp PA with 15Â dB backoff as the modest case, (c) Rapp PA with 5Â dB backoff as the worst case. Different combinations of FFT/AFB-based sensing and OFDM/FBMC-based PU waveforms.Back to article page