Unformatted text preview: 2 cos c t Amplifier KP s M (t ) s d (t ) Transmit Filter Ak Symbol Encoder Channel k ch = 20 dB
n (t )
x (t ) 1 S1 2
dk Differential Encoder
bk Optimal Symbol Detector BPF x r (t ) x d (t ) MF kTS
Per bit 1 Per bit 2 Decision Device A (r ) k Symbol Decoder 2 cos( c t + 0 ) th = 0 1
S2 2 Differential Decoder . , , b k (1 TS = 20 sec : . p (bk ) = 0.5 for k = 1,2 1; 0 t < TS . g (t ) = : Transmit Filter (2 0 otherwise . Ak = 1 s M (t ) = 2 Ak g (t  kTS ) cos c t k (3 0  n (t ) (4
N 0 = 3.78 10  6 V2 Hz 4 ((15%) d = Er Per bit1 N0
Ts
0 2 .("1" S1, S 2 ) . E r = s r (t )dt , 0  Per bit 2 .("2" S1, S 2 ) . Per symbol = Per bit 1 Per bit 2  Per bit1 ((5%) . 0 = 0  K P = 50 Per bit 2  Per bit1 ((10%) .' . 0 =  K P = 50 .Qfunction : 2 ' (40%)...
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 Spring '08
 drj

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