Comtech EF Data SLM-5650A Installation And Operation Manual page 491

CnC Ratio:
Ratio of Interfering Carrier Power to Desired Carrier Power (unit in dB).
The Interfering Carrier is the Tx Carrier from local modulator; the Desired Carrier is the carrier
from the distant end received by the local demodulator.
At the station transmitting C1: CnC Ratio (in dB) = PowerC1 (in dBm) – PowerC2 (in dBm)
Eb/No:
Ratio of Energy per bit (Eb) to Noise density (No) (unit in dB):
•
Eb/No = C/No – 10log(DR) [where DR is the Data Rate]
•
Eb/No = Es/No – 10log(SE) [where SE is Spectral Efficiency]
Es/No:
Ratio of Energy per symbol (Es) to Noise density (No) (unit in dB):
•
Es/No = C/No – 10log(SR) [where SR is the Symbol Rate]
•
Es/No = Eb/No + 10log(SE) [where SE is Spectral Efficiency]
C/N:
Ratio of Carrier Power (C) to Noise (N) (unit in dB):
Equivalent to Es/No when calculated in the Symbol Rate
bandwidth.
C/No:
Ratio of Carrier Power (C) to Noise Density (N
Co+No/No:
Ratio of Carrier Density (C
•
C/N = C/N
Hz]
•
E /N = C/N
b o
[where DR is data rate in bits/sec]
= C/N + 10
= C/N – 10
[where SE is Spectral Efficiency]
•
E /N = 10
b o
[where SE is Spectral Efficiency]
Spectral Efficiency is in bps / Hz]
Appendix H
) + Noise (N ) to Noise Density (N
o o
– 10 (B) [where B is bandwidth in
log
o
– 10 (DR)
log
o
(B) – 10 (DR)
log log
(SE)
log
((Co+No/No)/10)
(10 – 1) – 10
log
) (unit in dBHz)
o
) (unit in dB):
o
(SE)
log
G–25
SLM-5650A Satellite Modem
Revision 10
MN-SLM-5650A