CDD-562L/564 Demodulator with IP Module
Revision 2
Appendix C
MN/CDD564L.IOM
C–2
Example:
In the diagram that follows, the (Co+No)/No measured is 4.6 dB. If Rate 1/2 QPSK is
being used, this would correspond to an E
b
/N
0
of approximately 2.6 dB.
The exact relationship used to derive the table values is as follows:
E
b
/N
0
= 10 log
10
(10
(Co+No/No )/10)
-1) - 10 log
10
(FEC Code Rate) - 10 log
10
(bits/symbol)
Where:
•
E
b
/N
0
and (Co+No)/No are expressed in dB
•
Bits/symbol = 1 for BPSK
•
Bits/symbol = 2 for QPSK
•
Bits/symbol = 3 for 8-PSK/8-QAM
•
Bits/symbol = 4 for 16-QAM
•
Code Rate for ‘uncoded’ = 1
•
Pay close attention to the sign of the middle term
Summary of Contents for Vipersat CDD-562L
Page 2: ......
Page 4: ...ii This page is intentionally blank ...
Page 24: ...CDD 562L 564 Demodulator with Optional IP Module Revision 2 Preface MN CDD564L IOM xxii Notes ...
Page 40: ...CDD 562L 564 Demodulator with IP Module Revision 2 Introduction MN CDD564L IOM 1 16 Notes ...
Page 206: ...CDD 562L 564 Demodulator with IP Module Revision 2 Appendix A MN CDD564L IOM A 6 Notes ...
Page 216: ...CDD 562L 564 Demodulator with IP Module Revision 2 Appendix C MN CDD564L IOM C 4 Notes ...
Page 254: ...2114 WEST 7TH STREET TEMPE ARIZONA 85281 USA 480 333 2200 PHONE 480 333 2161 FAX ...
