Validation of a Digital Noise Power Integration Technique for Radiometric Clear Sky Attenuation Estimation at Q-Band

Alexios Costouri, James Nessel, George Goussetis

Research output: Contribution to journalArticle

Abstract

This paper presents the validation of a digital signal processing technique that can be used to estimate radiometric sky noise, and hence, atmospheric absorption, within existing digital receivers at little/no additional cost. To demonstrate this, a receiver was constructed that simultaneously records the beacon signal power from the ALPHASAT Aldo Paraboni technology demonstration payload, as well as the integrated noise power in the adjacent band. Calibration from the digital radiometer is performed using tip-curve calibration procedures. Atmospheric fading is then obtained by observing the beacon as well as the radiometric signals. This enables the comparison of fading obtained by the two techniques and provides a means to calibrate the received beacon power level to obtain total atmospheric attenuation. It is shown that for low levels of fading, up to a few dB, the two techniques provide good agreement. This approach can therefore provide a low-cost option for geostationary mmwave satellite channel measurements in the low fading regime, which can be useful in the design and operation of the feeder links in emerging satcom systems.
Original languageEnglish
JournalIEEE Transactions on Antennas and Propagation
Early online date16 Jun 2020
DOIs
Publication statusE-pub ahead of print - 16 Jun 2020

Keywords

  • ALPHASAT
  • Q-band
  • calibration
  • propagation
  • radiometer
  • software-defined radio(SDR)
  • tip-curve

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

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