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Course: TCOM 500, Fall 2008School: George Mason
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sheet Formula TCOM 500 Summer 2008 A P (dB ) = 1 0 lo g A P = 1 0 lo g dBm Po Pi AP ( dBm ) = 10 log P 1mW AV (dB ) = 2 0 lo g A V = 2 0 lo g Vo Vi power 0 1 2 3 4 5 value 1 2 4 8 16 32 binary 000001 000010 000100 001000 010000 100000 S N R = 2 0 lo g S ig n a l v o lta g e (rm s ) N o is e v o lta g e (rm s ) SNR = 10 log(Signal power/Noise power) C = B W lo g 2 (1 + S ) N bps log2(a) =...
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sheet Formula TCOM 500 Summer 2008
A
P (dB )
= 1 0 lo g A
P
= 1 0 lo g
dBm
Po Pi
AP ( dBm ) = 10 log
P 1mW
AV
(dB )
= 2 0 lo g A V = 2 0 lo g
Vo Vi
power 0 1 2 3 4 5
value 1 2 4 8 16 32
binary 000001 000010 000100 001000 010000 100000
S N R = 2 0 lo g
S ig n a l v o lta g e (rm s ) N o is e v o lta g e (rm s )
SNR = 10 log(Signal power/Noise power)
C = B W lo g 2 (1 +
S ) N
bps
log2(a) = log10(a)/0.30103 noise factor F F = (Si/Ni)/( So/No)
dec 11 10 12 13 14 15
hex A B C D E F
bin 1010 1011 1100 1101 1110 1111
noise figure NF = 10 log F
modulation index in AM V - Vmin V m = m = max Vc Vmax + Vmin Vm = VLSB + VUSB LSB: fc - fm mf = V M = m 100% , Vc VLSB = VUSB = USB: fc + fm 1 Vm 2 Mod index # of sideban...
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