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2 reed˚solomon codec ber (qpsk), 2 reed-solomon codec ber (qpsk) – Comtech EF Data SDM-9000 User Manual

Page 36

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Introduction

SDM-9000 Satellite Modem

1–14

Rev. 4

1.4.2 Reed-Solomon Codec BER (QPSK)

The Reed-Solomon specifications for the E

b

/N

0

required to achieve 10

-6

to 10

-10

BER for

different configurations are shown in Table 1-3. All values are for QPSK mode
operation. Refer to Figure 1-5 for the Reed-Solomon BER curves.

Table 1-3. Reed-Solomon BER Data

Specification

BER

1/2 Rate

3/4 Rate

7/8 Rate

10

-6

4.1 dB

5.6 dB

6.7 dB

10

-7

4.2 dB

5.8 dB

6.9 dB

10

-8

4.4 dB

6.0 dB

7.1 dB

10

-10

4.7 dB

6.4 dB

7.5 dB

Typical

BER

1/2 Rate

3/4 Rate

7/8 Rate

10

-6

3.5 dB

5.0 dB

6.1 dB

10

-7

3.6 dB

5.2 dB

6.3 dB

10

-8

3.8 dB

5.4 dB

6.5 dB

10

-10

4.1 dB

5.8 dB

6.9 dB