CDM-Qx Satellite Modem

Forward Error Correction Options

 

1

2

3

4

1E-1

12

 

 

 

Uncoded

BPSK/QPSK

1E-2

Performance with CDM-Qx

1E-3

Spec limit Rate 3/4 8-PSK

1E-4

SpecSpeclimitlimit

RateRate3/43/4

QPSK/OQPSK

1E-5

1E-6

1E-7

1E-8

 

 

 

 

 

Typical performance

 

 

1E-9

1

2

3

4

BER

12

 

 

 

Revision 5

MN/CDMQx.IOM

 

 

 

 

 

 

Eb/No in dB

5

6

7

8

9

10

11

Comtech Turbo Product Codec

Rate 3/4 QPSK, 8-PSK

and 16-QAM

Uncoded 16-QAM

Uncoded

8-PSK

Spec limit Rate 3/4 16-QAM

5

6

7

8

9

10

11

Figure 6-4. Comtech EF Data Turbo Product Codec

Rate 3/4 QPSK, 8-PSK and 16-QAM

6–13

Page 145
Image 145
Mocomtech CDM-QX operation manual Comtech Turbo Product Codec Rate 3/4 QPSK, 8-PSK 16-QAM