Comparison Of All Tpc Modes - Comtech EF Data CDM-570L Installation And Operation Manual

CDM-570/570L Satellite Modem with Optional IP Module
Forward Error Correction Options
7.5.5

Comparison of all TPC Modes

Mode
QPSK Rate 1/2 Viterbi *
BPSK Rate 21/44 Turbo
BPSK Rate 5/16 Turbo
QPSK/ OQPSK
Rate 21/44 Turbo
QPSK/ OQPSK
Rate 3/4 Turbo
QPSK/ OQPSK
Rate 7/8 Turbo
QPSK/ OQPSK
Rate 0.95 Turbo
8-PSK Rate 2/3 TCM **
and RS (IESS-310)
8-PSK Rate 3/4 Turbo
8-PSK Rate 7/8 Turbo
8-PSK Rate 0.95 Turbo
8-QAM Rate 3/4 Turbo
8-QAM Rate 7/8 Turbo
8-QAM Rate 0.95 Turbo
16-QAM Rate 3/4 Turbo
16-QAM Rate 7/8 Turbo
16-QAM Rate 3/4 **
Viterbi/Reed-Solomon
16-QAM Rate 7/8 **
Viterbi/Reed-Solomon
* The occupied bandwidth is defined at the width of the transmitted spectrum taken at the –10 dB
points on the plot of power spectral density. This equates to 1.19 x symbol rate for the
CDM-570/570L transmit filtering.
** Included for comparative purposes
Eb/No at Eb/No at
-6
BER = 10 BER = 10
Guaranteed Guaranteed
(Typical in (Typical in
parentheses) parentheses)
6.0 dB 7.3 dB
(5.5 dB) (6.8 dB)
2.9 dB 3.3 dB
(2.6 dB) (3.0 dB)
2.4 dB 2.8 dB
(2.1 dB) (2.5 dB)
2.9 dB 3.2 dB
(2.6 dB) (2.8 dB)
3.8 dB 4.4 dB
(3.3 dB) (4.0 dB)
4.3 dB 4.5 dB
(4.0 dB) (4.2 dB)
6.4 dB 6.9 dB
(6.0 dB) (6.5 dB)
6.5 dB 6.9 dB
(5.6 dB) (6.0 dB)
6.2 dB 6.8 dB
(5.7 dB) (6.3 dB)
7.0 dB 7.2 dB
(6.6 dB) (6.8 dB)
9.3 dB 10.3dB
(8.9 dB) (9.9 dB)
6.5 dB 7.2 dB
(6.1 dB) (6.8 dB)
6.6 dB 6.8 dB
(6.2 dB) (6.4 dB)
9.6 dB 10.6 dB
(9.2 dB) (10.2 dB)
7.4 dB 8.2 dB
(7.0 dB) (7.7 dB)
8.1 dB 8.3 dB
(7.7 dB) (7.9 dB)
8.1 dB 8.6 dB
(7.5 dB) (8.0 dB)
9.5 dB 10.1 dB
(9.0 dB) (9.5 dB)
7–7
-8
Spectral
Symbol Rate
Efficiency
1.00 bits/Hz 1.0 x bit rate
0.48 bits/Hz 2.1 x bit rate
0.31 bits/Hz 3.2 x bit rate
0.96 bits/Hz 1.05 x bit rate
1.50 bits/Hz 0.67 x bit rate
1.75 bits/Hz 0.57 x bit rate
1.90 bits/Hz 0.53 x bit rate
1.82 bits/Hz 0.56 x bit rate
2.25 bits/Hz 0.44 x bit rate
2.62 bits/Hz 0.38 x bit rate
2.85 bits/Hz 0.35 x bit rate
2.25 bits/Hz 0.44 x bit rate
2.62 bits/Hz 0.38 x bit rate
2.85 bits/Hz 0.35 x bit rate
3.00 bits/Hz 0.33 x bit rate
3.50 bits/Hz 0.28 x bit rate
2.73 bits/Hz 0.37 x bit rate
3.18 bits/Hz 0.31 x bit rate
Revision 4
MN/CDM570L.IOM
Occupied *
Bandwidth
for 1 Mbps
Carrier
1190 kHz
2493 kHz
3808 kHz
1246 kHz
793 kHz
678 kHz
626 kHz
666 kHz
529 kHz
453 kHz
377 kHz
529 kHz
453 kHz
377 kHz
396 kHz
340 kHz
435 kHz
374 kHz