Adaptive Double-Threshold Cooperative Spectrum Sensing Algorithm Based on History Energy Detection

Algorithm 1

Adaptive double-threshold spectrum sensing algorithm of single node based on history energy detection.

Input:, Queue,

Output:

1: procedure SINGLE NODE ENERGY DETECTION

2:  Flag0

3:  Calculate ,,

4:  Queue ()

5: top:

6:  ifthen

7:   

8:  else

9:   ifthen

10:     

11:   else

12:     ifFlag = 0 then

13:      Calculate

14:     end if

15:     ifFlag = 0 then

16:      Flag1,

17:      gototop

18:     else

19:      Calculate

20:      ifthen

21:       

22:      else

23:       

24:      end if

25:     end if

26:    end if

27:  end if

28:  return

29: end procedure