Advantages of analog 2 GHz AM for satellite internet?

[Green Xenon]

Hi:

 

Here is a speculative situation involving satellite internet access

 

A client connects to the internet through a two-way satellite modem provided by the ISP. The satellite is geostationary and uses one frequency for radio telecommunication -- 2 GHz. The modulation is AM. Both the carrier and modulation signals are completely linear. The carrier is always analog and amplitude-modulation. The modulation signal is initially digital but is converted to analog -- via a DAC -- prior to being transmitted on the carrier. On the receiving end, the analog AM carrier signal is amplified [using a 2 GHz amplifier] and is subsequently demodulated. After demodulation, the resulting modulator signal further amplified. Finally, the modulation signal, is converted back to digital -- via an ADC.

 

What would be the benefit of using 2 GHz AM for this purpose?

 

 

Thanks,

 

GX