The two hypotheses conditional pdf lHy-" (4.14) (4.15) The threshold 元0 TMAP = 4 (4.16) UESTC π1 1010 UESTC 2 1 2 1 ( ) ( | ) exp( ) (4.14) 2 2 n y b p y H    − = − 2 0 2 1 ( ) ( | ) exp( ) (4.15) 2 2 n y b p y H    + = − 0 1 MAP 4 (4.16)    = = The two hypotheses conditional pdf The threshold