VCM Example:
Maximize Throughput
•
Each zone gets an equal share of the BW. The network
now has an average throughput of 27.6 Mbps
43
Site A Site B Site C
Modulation / Coding 16-APSK 2/3 8-PSK 2/3 QPSK 4/5
Spectral Efficiency 2.64 bits/Hz 1.98 bits/Hz 1.59 bits/Hz
Es/No Required >= 9.0 dB 6.6 –
9.0 dB 4.7 –
6.6 dB
User Data Rate 35.2 Mbps 26.4 Mbps 21.2 Mbps
Symbol Rate required
= BW Required w/o
spacing
13.33 Msps 13.33 Msps 13.33 Msps
