Harris Constellation - Page 108

Constellation® January 2006
7-16 Performance Curves
Figure 7-13: Typical BER vs. C/N and C/I (Constellation 155)
–10
-2
—
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-
–10
-3
—
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–10
-4
—
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–10
-5
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–10
-6
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•–10
-7
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–10
-8
—
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–10
-9
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–10
-10
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–10
-11
—
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–10
-12
—
— - - - - — - - - - — - - - - — - - - - — - - - - — - - - - — - - - - —
BER
(OUTAGE)
5.5 dB FEC
Coding Gain
(STATIC)
21 dB
23 dB
29.5 dB24 dB
BER vs. C/N and C/I*
128 QAM with Coherent Detection,
without Forward Error Correction
Constellation128 QAM with
Coherent Detection and Powerful
FEC (TCM Inner Code and
Reed-Solomon Outer Code)
*Like Co-Channel Interference
**At Top-of-Rack
5 10 15 20 25 30 35 40
C/N or C/I* Ratio, dB
-80 -75 -70 -65 -60
RSL**, dBm
–10
-2
—
-
-
-
-
–10
-3
—
-
-
-
-
–10
-4
—
-
-
-
-
–10
-5
—
-
-
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-
–10
-6
—
-
-
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•–10
-7
—
-
-
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-
–10
-8
—
-
-
-
-
–10
-9
—
-
-
-
-
–10
-10
—
-
-
-
-
–10
-11
—
-
-
-
-
–10
-12
—
— - - - - — - - - - — - - - - — - - - - — - - - - — - - - - — - - - - —
BER
(OUTAGE)
5.5 dB FEC
Coding Gain
(STATIC)
21 dB
23 dB
29.5 dB24 dB
BER vs. C/N and C/I*
128 QAM with Coherent Detection,
without Forward Error Correction
Constellation128 QAM with
Coherent Detection and Powerful
FEC (TCM Inner Code and
Reed-Solomon Outer Code)
*Like Co-Channel Interference
**At Top-of-Rack
–10
-2
—
-
-
-
-
–10
-3
—
-
-
-
-
–10
-4
—
-
-
-
-
–10
-5
—
-
-
-
-
–10
-6
—
-
-
-
-
•–10
-7
—
-
-
-
-
–10
-8
—
-
-
-
-
–10
-9
—
-
-
-
-
–10
-10
—
-
-
-
-
–10
-11
—
-
-
-
-
–10
-12
—
— - - - - — - - - - — - - - - — - - - - — - - - - — - - - - — - - - - —
BER
(OUTAGE)
5.5 dB FEC
Coding Gain
(STATIC)
21 dB
23 dB
29.5 dB24 dB
BER vs. C/N and C/I*
128 QAM with Coherent Detection,
without Forward Error Correction
Constellation128 QAM with
Coherent Detection and Powerful
FEC (TCM Inner Code and
Reed-Solomon Outer Code)
*Like Co-Channel Interference
**At Top-of-Rack
5 10 15 20 25 30 35 40
C/N or C/I* Ratio, dB
-80 -75 -70 -65 -60
RSL**, dBm