Table 7-5. Available Tpc And Ldpc Modes - Comtech EF Data CDM-600 Operating Instructions Manual

CDM-600 Satellite Modem
Forward Error Correction Options
It is clear that in order to provide the best possible performance over the range of code rates
from 1/2 to 0.95, both an LDPC and a TPC codec need to be offered.
In order to meet this requirement, Comtech EF Data has developed a combination
LDPC/TPC Codec module that can be added to the CDM-600 Modem, and which provides
the following operating modes:
TPC Code Rate/Modulation
Rate 21/44 BPSK
Rate 5/16 BPSK
Rate 1/2 QPSK, OQPSK
Rate 3/4 QPSK, OQPSK
Rate 3/4 8-PSK
Rate 3/4 16-QAM
Rate 7/8 QPSK, OQPSK
Rate 7/8 8-PSK
Rate 7/8 16-QAM
Rate 0.95 QPSK, OQPSK
Rate 0.95 8-PSK
LDPC Code Rate/Modulation
Rate 1/2 BPSK
Rate 1/2 QPSK, OQPSK
Rate 2/3 QPSK, OQPSK
Rate 2/3 8-PSK , 8-QAM
Rate 3/4 QPSK, OQPSK
Rate 3/4 8-PSK , 8-QAM
Rate 3/4 16-QAM

Table 7-5. Available TPC and LDPC Modes

Data Rate Range
4.8 kbps to 3.2 Mbps
4.8 kbps to 2.048 Mbps
4.8 kbps to 9.54 Mbps
7.2 kbps to 5.0 Mbps
10.8 kbps to 5.0 Mbps
14.4 kbps to 5.0 Mbps
8.4 kbps to 17.5 Mbps
12.6 kbps to 20 Mbps
16.8 kbps to 20 Mbps
9.1 kbps to 18.888 Mbps
13.6 kbps to 20 Mbps
Data Rate Range
4.8 kbps to 5.0 Mbps
4.8 kbps to 10.0 Mbps
6.4 kbps to 13.3 Mbps
9.6 kbps to 19.0 Mbps
7.2 kbps to 15.0 Mbps
10.8 kbps to 20.0 Mbps
14.4 kbps to 20.0 Mbps
7–8
(to 4.772 Mbps with High Rate Turbo card)
(to 3.12 Mbps with High Rate Turbo card)
(High Rate Turbo card only)
(to 15 Mbps with High Rate Turbo card)
(to 20 Mbps with High Rate Turbo card)
(to 20 Mbps with High Rate Turbo card)
(High Rate Turbo card only)
(High Rate Turbo card only)
(High Rate Turbo card only)
(High Rate Turbo card only)
(High Rate Turbo card only)
(TPC/LDPC Codec card only)
(TPC/LDPC Codec card only)
(TPC/LDPC Codec card only)
(TPC/LDPC Codec card only)
(TPC/LDPC Codec card only)
(TPC/LDPC Codec card only)
(TPC/LDPC Codec card only)
Revision 7
MN/CDM600.IOM