(C+N)/N To C/N And E Conversion - Comtech EF Data SDM-2020 Installation And Operation Manual

Operation
3.4.1 (C+N)/N to C/N and E
Table 3-5 provides conversions from (C+N)/N to E b /N 0 that are useful when evaluating
satellite links with a spectrum analyzer.
The following equations was used to build the conversion table.
C/N (= Co/No) = 10*Log(10^[(C+N)/N/10]-1)
and Eb/No
3–54
/N Conversion
b 0
= C/N – 10*Log(m*CRv) – 10*Log(188/204)
Modulation Inner Code
QPSK ½
QPSK 2/3
QPSK ¾
QPSK 5/6
QPSK 7/8
8PSK 2/3
8PSK 5/6
8PSK 8/9
16QAM ¾
16QAM 7/8
SDM-2020 Satellite Demodulator
E b /N 0 = C/N +
0.35
-0.89
-1.41
-1.86
-2.08
-2.66
-3.62
-3.90
-4.42
-5.09
Rev. 3