Abstract
This paper studies the data rate that a High Throughput Satellite (HTS) system with fully-regenerative payload can achieve when using an intensity modulation/direct detection optical feeder link. A low-order M-ary Pulse Amplitude Modulation (M-PAM) with time-packing is used to modulate the intensity of the laser diode beam, making use of an external Mach-Zehnder modulator. These M-PAM symbols are recovered on-board the satellite with the aid of a photodetector, and are then encapsulated into the 5G radio frame of the access link. The M-PAM modulation order and the overlapping factor of timepacking are jointly selected to tackle the impact of slowly-varying weather conditions. Moreover, the inter-symbol interference that time-packing introduces is mitigated in reception using a Viterbi equalizer. As expected, time-packing enables a finer granularity on the link adaptation capability of the optical feeder link, enabling to adjust its spectral efficiency according to the moderate attenuation that thin cloud layers introduce.
| Original language | English |
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| Title of host publication | Proc. IEEE 5G World Forum (5GWF) |
| Publisher | IEEE |
| Pages | 186-192 |
| Number of pages | 7 |
| ISBN (Electronic) | 978-1-7281-7299-6 |
| DOIs | |
| Publication status | Published - Sep 2020 |
| MoE publication type | A4 Article in a conference publication |
| Event | IEEE 5G World Forum - Bangalore, India Duration: 10 Sep 2020 → 12 Sep 2020 |
Conference
| Conference | IEEE 5G World Forum |
|---|---|
| Abbreviated title | 5GWF |
| Country | India |
| City | Bangalore |
| Period | 10/09/2020 → 12/09/2020 |