Spectrumize: Spectrum-efficient Satellite Networks for the Internet of Things
Talkat 21st USENIX Symposium on Networked Systems Design and Implementation (NSDI '24) · 2024-04-16..04-18·
summary
Spectrumize is a system for downlink from LEO pico-satellites that uses predicted Doppler signature sequences as CDMA-like codes to correlate an entire preamble train instead of single preambles. Tested on MSR Sat one (partnered with FZA) and simulations, it recovers packets buried under noise where 65% of satellite downlink packets were initially lost, achieves up to 3x improvement in packet detection over baselines, and decodes collided transmissions with about 80% decoding accuracy.
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chapters (5)
- 0:00Introduction
- 2:56PicoSat downlink challenges
- 9:58Spectrumize with Doppler shift
- 15:37Results and evaluation
- 17:02Q&A
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