An Energy Detection-Based Spectrum-Sensing Method for Cognitive Radio

Table 2

The total computation complexity of ED and ED-BS with different M and N.

	The computation complexity of ED	The computation complexity of ED-BS
M = 2, N = 500	O(3502)	O(1999)
M = 3, N = 500	O(5002)	O(2999)
M = 4, N = 500	O(6502)	O(3999)
M = 2, N = 1000	O(7002)	O(3999)
M = 3, N = 1000	O(10002)	O(5999)
M = 4, N = 1000	O(13002)	O(7999)
M = 2, N = 2000	O(14002)	O(7999)
M = 3, N = 2000	O(20002)	O(11999)
M = 4, N = 2000	O(26002)	O(15999)