... sensing. The total time toperform a discrete Fourier Transform (DFT) is given byTDFT=1FDSP4N log2N − 6N +8,(3)where FDSPis the DSP operating frequency. For simplicity,assume that ... appropriate channel for CR operation (i.e., increases).Similarly, the physical implementation is mostly defined bythe user given restrictions on cost, power, performance, andso forth. For example, ... small enough tostart infringing on the need for fine sensing. When the SNRis high, the probability of detection increases, and thereforethe need for additional coarse search bins is reduced...