Ensemble Classifier Based Spectrum Sensing in Cognitive Radio Networks

Algorithm 2

FAM algorithm.

1: Divide into blocks with samples per block.

Skip data samples between two consecutive blocks. Fix the value of to .

Determine the values of and by:

2: Apply , known as the hamming window across each block.

3: Obtain the complex envelope by computing - points FFT of each block.

Multiply the output by , for downshifting in the frequency:

4: Compute the complex conjugates of .

5: Estimate CS by taking product of with its conjugate.

6: Compute - points FFT of the product.