Skip to main content

Table 2 Cognitive user link budget

From: On the feasibility of a secondary service transmission over an existent satellite infrastructure: design and analysis

Transmitted power (mW)100*0.15
Satellite carrier EIRP (dBm)20.1
Free space loss (dB)−162.2
Depointing loss (dB)−10
Ground station antenna max gain - 5m, eff 50% (dBi)38.2
System noise temperature (K)130
C (dBm)−113.9
C/N0 (dB–Hz)63.6
Demodulation losses (dB)−6
Eb/N0 required (dB) – for BER = 1E-3 
DPC 16-QAM10
DPC 64-QAM9.4
DPC 256-QAM8.5
DPC 1024-QAM5.9
Eb/N0 required (dB) – for BER = 1E-5 
DPC 16-QAM12.5
DPC 64-QAM12.25
DPC 256-QAM12
DPC 1024-QAM11
Margin (dB)3
Minimum Bit Rate (kbps) – DPC 16-QAM 
BER = 1E-328.8
BER = 1E-516.2
Maximum bit rate (kbps) – DPC 1024-QAM 
BER = 1E-374.1
BER = 1E-522.9
DPC 16-QAM5.0
DPC 64-QAM4.67
DPC 256-QAM4.79
DPC 1024-QAM4.91