Figure 18
From: Optimized spectrum sensing algorithms for cognitive LTE femtocells
A graph showing the effect of FFT coarse sensing module alone versus using the fine CP correlation sensing after the coarse sensing for a 2.5 m sensing duration. FWT coarse sensing module is also investigated alone versus using the fine P-SCH correlation sensing after the coarse sensing for a 10-ms sensing duration. Both simulations are done in an AWGN channel, -5 dB SNR.