Comtech EF Data DMD50 Installation And Operation Manual page 78

DMD50 Universal Satellite Modem
Eb/No
Ratio of Energy per bit (Eb) to Noise density (No): Unit is dB
C/N
Carrier Power (C) to Noise (N) ratio: Unit is dB
C/No
Carrier Power (C) to Noise Density (N
Co+No/No
Carrier Density (C
ratio: Unit is dB
C/N = C/N – 10 log B [where B is bandwidth in Hz]
o
E /N = C/N – 10 log R [where R is data rate in bits/sec]
b o o
= C/N + 10 log B – 10 log R
= C/N – 10 log (Spectral Efficiency)
E /N = 10 log (10
b o
[Spectral Efficiency is in bps / Hz]
MN-DMD50– Revision 3
) ratio: Unit is dBHz
o
) + Noise (N ) to Noise Density (N
o o
((Co+No/No)/10)
– 1) – 10 log (Spectral Efficiency)
)
o
Theory of Operation
3–42