We have been studying a direct spectrum division transmission (DSDT) technique that can divide a single carrier signal into multiple subspectra and assign them to dispersed frequency resources of the satellite transponder to improve the spectrum efficiency of the whole system. In a past study, we carried out fundamental satellite experiments on DSDT over a single transponder. This time, we conduct satellite experiments on DSDT over multiple transponders by using the latest DVB-S2X format signal. We expect using DSDT over multiple transponders will provide a new type of satellite communication service by raking unused frequency resources dispersed through multiple transponders.

Chapter Contents:

• 13.1 Introduction
• 13.2 Operational principle of DSDT adapter
• 13.2.1 Spectrum-editing technique in transmitter
• 13.2.2 Synchronization technique in receiver
• 13.2.2.1 Auto phase control
• 13.2.2.2 Auto frequency control
• 13.2.2.3 Auto gain control
• 13.3 Satellite experiments
• 13.3.1 Experimental setup
• 13.3.2 Spectrum division over multiple transponders
• 13.4 Summary
• References

Inspec keywords: satellite communication; transponders

Other keywords: multiple subspectra; DVB-S2X format signal; single carrier signal; multiple transponders; direct spectrum division transmission technique; single transponder; fundamental satellite experiments; dispersed frequency resources; DSDT; spectrum efficiency; satellite communication service; satellite transponder

Subjects: Satellite communication systems