Time-Packing as Enabler of Optical Feeder Link Adaptation in High Throughput Satellite Systems

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

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 languageEnglish
Title of host publicationProc. IEEE 5G World Forum (5GWF)
PublisherIEEE
Pages186-192
Number of pages7
ISBN (Electronic)978-1-7281-7299-6
DOIs
Publication statusPublished - Sep 2020
MoE publication typeA4 Article in a conference publication
EventIEEE 5G World Forum - Bangalore, India
Duration: 10 Sep 202012 Sep 2020

Conference

ConferenceIEEE 5G World Forum
Abbreviated title5GWF
CountryIndia
CityBangalore
Period10/09/202012/09/2020

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