CDM-Qx Satellite Modem

Forward Error Correction Options

1 2 3 4

1E-1

Uncoded

BPSK/QPSK

1E-2

Performance with CDM-Qx

1E-3

Spec limit

Rate 7/8

QPSK/OQPSK

1E-4

1E-5

1E-6

1E-7

1E-8

 

 

 

Typical performance

 

 

1E-9

2

3

4

1

BER

Revision 5

MN/CDMQx.IOM

 

 

 

 

 

 

Eb/No in dB

5

6

7

8

9

10

11

12

Comtech Turbo Product Codec

Rate 7/8 QPSK, 8-PSK

and 16-QAM

Uncoded 16-QAM

Spec limit Rate 7/8 8-PSK

Uncoded

8-PSK

Spec limit Rate 7/8 16-QAM

5

6

7

8

9

10

11

12

Figure 6-5. Comtech EF Data Turbo Product Codec

Rate 7/8 QPSK, 8-PSK and 16-QAM

6–14

Page 146
Image 146
Mocomtech CDM-QX operation manual Comtech Turbo Product Codec Rate 7/8 QPSK, 8-PSK 16-QAM