CDM-625 Advanced Satellite Modem
Revision 1
Introduction
MN-0000036 (Ref MN/CDM625.IOM)
8-PSK/TCM CODEC
BER
(With two adjacent
carriers, each 7 dB
higher than the desired
carrier)
For:
BER=10
-5
BER=10
-7
BER=10
-8
Rate 2/3
8-PSK/TCM
Guaranteed Eb/No:
(typical value in
parentheses)
7.9 dB (7.2 dB)
9.5 dB (8.7 dB)
10.4 dB (9.5 dB)
Rate 2/3
8-PSK/TCM
w/concatenated RS
Guaranteed Eb/No:
(typical value in
parentheses)
6.3 dB (5.4 dB)
6.7 dB (5.8 dB)
6.9 dB (6.0 dB)
16-QAM VITERBI/
220,200 RS
BER
(With two adjacent
carriers, each 7 dB
higher than the desired
carrier)
For:
BER=10
-6
BER=10
-8
16-QAM Rate 3/4
Viterbi/RS
Guaranteed Eb/No:
(typical value in
parentheses)
8.1 dB (7.5 dB)
8.6 dB (8.0 dB)
16-QAM Rate 7/8
Viterbi/RS
Guaranteed Eb/No:
(typical value in
parentheses)
9.5 dB (9.0 dB)
10.1 dB (9.5 dB)
Attention:
For 126,112
Reed-Solomon
Add 0.2 dB
to these
figures
TURBO PRODUCT
CODEC BER
Rate 21/44 B/Q/OQPSK
Rate 5/16 BPSK
BER
(With two adjacent
carriers, each 7 dB
higher than the desired
carrier)
For:
BER=10
-6
BER=10
-7
BER=10
-8
Rate 21/44
(B, Q, OQ)
*
Guaranteed Eb/No:
(typical value in
parentheses)
3.1 dB (2.9 dB)
3.3 dB (3.1 dB)
3.5 dB (3.3 dB)
Rate 5/16 (B)
Guaranteed Eb/No:
(typical value in
parentheses)
2.7 dB (2.5dB)
2.9 dB (2.7dB)
3.1 dB (2.9dB)
* See Notes 1 and 2
TURBO PRODUCT
CODEC BER
Rate 3/4 QPSK
Rate 3/4 8-PSK/8-QAM
Rate 3/4 16-QAM
BER
(With two adjacent
carriers, each 7 dB
higher than the desired
carrier)
For:
BER=10
-6
BER=10
-7
BER=10
-8
Rate 3/4
(Q, OQ)
Guaranteed Eb/No:
(typical value in
parentheses)
3.8dB (3.4dB)
4.1dB (3.7dB)
4.4dB (4.0dB)
Rate 3/4 (8-PSK,
8-QAM)
Guaranteed Eb/No:
(typical value in
parentheses)
6.4 dB (6.0 dB)
6.7 dB (6.3 dB)
7.1 dB (6.7 dB)
Rate 3/4 (16-QAM)
Guaranteed Eb/No:
(typical value in
parentheses)
7.4dB (7.0 dB)
7.8 dB (7.3 dB)
8.2 dB (7.7 dB)
TURBO PRODUCT
CODEC BER
Rate 7/8 QPSK
Rate 7/8 8-PSK/8-QAM
Rate 7/8 16-QAM
BER
(With two adjacent
carriers, each 7 dB
higher than the desired
carrier)
For:
BER=10
-5
BER=10
-8
Rate 7/8
(Q, OQ)
Guaranteed Eb/No:
(typical value in
parentheses)
4.3 dB (4.0 dB)
4.5 dB (4.2 dB)
Rate 7/8 (8-PSK,
8-QAM)
Guaranteed Eb/No:
(typical value in
parentheses)
7.0 dB (6.7 dB)
7.2 dB (6.8 dB)
Rate 7/8 (16-QAM)
Guaranteed Eb/No:
(typical value in
parentheses)
8.1 dB (7.7 dB)
8.3 dB (7.9 dB)
TURBO PRODUCT
CODEC BER
Rate 0.95 QPSK
Rate 0.95 8-PSK/8-QAM
BER
(With two adjacent
carriers, each 7 dB
higher than the desired
carrier)
For:
BER=10
-6
BER=10
-7
BER=10
-8
Rate 0.95 (Q, OQ)
Guaranteed Eb/No:
(typical value in
parentheses)
6.4 dB (6.0 dB)
6.7 dB (6.3 dB)
6.9 dB (6.5 dB)
Rate 0.95 (8-PSK,
8-QAM)
Guaranteed Eb/No:
(typical value in
parentheses)
9.6 dB (9.2 dB)
10.1 dB (9.7 dB)
10.6 dB (10.2 dB)
LDPC CODEC BER
Rate 1/2 B/Q/OQPSK
Rate 2/3 Q/OQPSK
Rate 1/2 Q/OQPSK
(With two adjacent
carriers, each 7 dB
higher than the desired
carrier)
*
See Note 2
For:
BER=10
-5
BER=10
-9
BPSK/QPSK/OQPSK
*
Rate 1/2 LDPC
Guaranteed
Eb/No:
(typical value in
parentheses)
2.0 dB (1.7 dB)
2.3 dB (2.0 dB)
QPSK/OQPSK
Rate 2/3 LDPC
Guaranteed Eb/No:
(typical value in
parentheses)
2.3 dB (2.0 dB)
2.7 dB (2.3 dB)
QPSK/OQPSK
Rate 3/4 LDPC
Guaranteed Eb/No:
(typical value in
parentheses)
3.0 dB (2.6 dB)
3.3 dB (3.0 dB)
1–13
