Mocomtech CDM-QX operation manual PSK 3/4 Turbo, α = 35%

CDM-Qx Satellite Modem	Revision 5
CnCPerformance Characterization	MN/CDMQx.IOM

	Eb/No Degradation Versus			Carrier Spacing
		QPSK 3/4 Turbo α = 20%
	0
	-0.5
Degradation	-1
	-1.5				-3 dB
	-2				0 dB
					3 dB
Eb/No	-2.5		For Two Equally Space Carriers		6 dB
	-3
			Each With Level Relative To
	-3.5		Desired
	-4
	0.70	0.90	1.10	1.30	1.50
		Carrier Spacing Normalized To Symbol Rate

	Eb/No Degradation Versus			Carrier Spacing
		QPSK 3/4 Turbo, α = 35%
	0
	-0.5
Degradation	-1
	-1.5				-3 dB
	-2				0 dB
					3 dB
Eb/No	-2.5		For Two Equally Space Carriers		6 dB
	-3
			Each With Level Relative To
	-3.5		Desired
	-4
	0.70	0.90	1.10	1.30	1.50
		Carrier Spacing Normalized To Symbol Rate

Figure D-2. QPSK 3/4 Turbo degradation versus relative carrier spacing (for two adjacent carriers)

		Eb/No Degradation Versus Carrier Spacing
		8-PSK 3/4 Turbo, α = 20%
	0.0
Degradation	-0.2
	-0.4
	-0.6				-3 dB
	-0.8
					0 dB
	-1.0
					3 dB
	-1.2
Eb/No					6 dB
	-1.4
			For Two Equally Space
	-1.6
	-1.8		Carriers Each With Level
			Relative To Desired
	-2.0
	0.80	1.00	1.20	1.40	1.60
	Carrier Spacing Normalized To Symbol Rate

		Eb/No Degradation Versus Carrier Spacing
		8-PSK 3/4 Turbo, α = 35%
	0.0
Degradation	-0.2
	-0.4				-3 dB
	-0.6				0 dB
	-0.8				3 dB
Eb/No	-1.0				6 dB
			For Two Equally Space
	-1.2
			Carriers Each With Level
	-1.4		Relative To Desired
	0.80	1.00	1.20	1.40	1.60
	Carrier Spacing Normalized To Symbol Rate

Figure D-3. 8-PSK 3/4 Turbo degradation versus relative carrier spacing (for two adjacent carriers)

		Eb/No Degradation Versus Carrier Spacing
		16-QAM 3/4 Turbo, α = 20%
	0.0
Degradation	-0.5
	-1.0				-3 dB
	-1.5
					0 dB
	-2.0
					3 dB
	-2.5
Eb/No			For Two Equally Space		6 dB
	-3.0
			Carriers Each With Level
	-3.5			Relative To Desired
	-4.0
	0.80	1.00	1.20	1.40	1.60
	Carrier Spacing Normalized To Symbol Rate

		Eb/No Degradation Versus Carrier Spacing
		16-QAM 3/4 Turbo, α = 35%
	0.0
Degradation	-0.5
	-1.0				-3 dB
	-1.5
					0 dB
	-2.0
					3 dB
	-2.5
Eb/No			For Two Equally Space		6 dB
	-3.0
			Carriers Each With Level
	-3.5			Relative To Desired
	-4.0
	0.80	1.00	1.20	1.40	1.60
	Carrier Spacing Normalized To Symbol Rate

Figure D-4. 16-QAM 3/4 Turbo degradation versus relative carrier spacing (for two adjacent carriers)

D–4