Paradise P300 Tables to Convert C+N/N to Eb/No, Adjust for Modulation FEC Rate RS Codec

8.12.5 Tables to Convert (C+N)/N to Eb/No

C N

4.6

4.8

5.0

5.2

5.4

5.6

5.8

6.0

6.2

6.4

6.6

6.8

7.0

7.2

7.4

7.6

7.8

8.0

N%

8.2

8.4

8.6

8.8

9.0

9.2

9.4

9.6

9.8

10.0

10.5

11.0

11.5

12.0

12.5

13.0

13.5

14.0

14.5

15.0

15.5

16.0

16.5

17.0

17.5

18.0

18.5

19.0

19.5

>20

(C+N)/N=

8.4dB

Measure

P300H

	C		ES		Et				EDec			Eb
	N 'N0				N0				N0			N0
		2.75
		3.05
		3.35
		3.64
		3.92
		4.20
		4.47
		4.74
		5.01
		5.27
		5.53
		5.78
		6.03
		6.28
		6.53
		6.77
		7.01
		7.25
		7.49
		7.72		Adjust for				Adjust for			Adjust for
		7.95
				modulation:				FEC Rate:		RS Codec:
		8.19
		8.42		BPSK: -0dB			½ Rate: +3.0dB				(n,k,t)=
		8.64
		8.87		QPSK: -3.0dB			¾ Rate: +1.25dB			(126,112,7): +0.51dB
		9.10
		9.32		OQPSK: -3.0dB				Rate: +0.58dB		(219,201,9): +0.37dB
		9.54		8PSK: -4.77dB				Rate: +1.76dB		(225,205,10): +0.40dB
		10.09					b
		10.64
							f
		11.18
		11.72
		12.25
		12.78
		13.30
		13.82
		14.34
		14.86
		15.38
		15.89
		16.40
		16.91
		17.42
		17.93
		18.44
		18.94
		19.45
	=(C+N) / N
(error <0 .04dB)
		Example: 8SPK with Rate TCM FEC, & RS=(219,201,9)
		C/N=		8PSK so			2/3 Rate FEC, so			RS Code (219,201,9) so
	7.72dB			subtract 4.77dB				add 1.76dB		add 0.37dB
	Look up					Calculate Eb/No = C/N - 2.64dB
	P300 Series			Modem Installationb			and Operating Handbook						Page 162