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Narrowband and Wideband Channel Sounding of an Antarctica to Spain Ionospheric Radio Link M. Hervs, R.M. Alsina-Pags, F. Orga, J.L. Pijoan and D.Badia GR-SETAD La Salle, Universitat Ramon Llull D. Altadill Observatori de lEbre, (OE),

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Narrowband and Wideband Channel Sounding of an Antarctica to Spain Ionospheric Radio Link

M. Hervás, R.M. Alsina-Pagès,
F. Orga, J.L. Pijoan and D.Badia

GR-SETAD La Salle, Universitat Ramon Llull

D. Altadill

Observatori de l’Ebre, (OE), CSIC - Universitat Ramon Llull, (mhervas@salleurl.edu)

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Index

1. Introduction
2. Measured Parameters
1. Geomagnetic Parameters
2. Vertical incidence soundings
3. Oblique ionosonde soundings
3. System description
4. Data analysis
5. Results
1. Narrowband
2. Wideband
6. Conclusions

La Salle, Ramon Llull University (URL) - GRSETAD 2/15

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Antarctic Project

Long-haul link between Antarctica to Spain to transmit data from remote sensors. Oblique Ionospheric Sounder 12.760Km

1. Introduction

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1. Introduction

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20 km 20 mi

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2. Measured Parameters

Geomagnetic Parameters

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2. Measured Parameters

Vertical ionosonde

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2. Measured Parameters

Oblique ionosonde

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3. System Description

Transmitter Receiver

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4. Data Analysis

Narrowband

SNR Availability

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Wideband

Doppler Spread Multipath Delay Spread

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4. Data Analysis

Narrowband sounding

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t0 t1 t2 t3 t4 t5 t6 t7 t8 t9 idle1 idle2 idle0 idle3

Kaiser windowing of 10 Hz of BW Signal is measured in 10 slot t0-t9 Noise is measured in 4 idle slots

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5 10 15 20 5 10 15 20 25 30 Hours (UTC) Frequency (MHz) 5 10 15 20 25 30 35

Night Sunrise Day Sunset Night

4. Data Analysis

Narrowband sounding

SNR (dB) of February 17th (in dB) over a bandwidth of 10 Hz

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4. Data Analysis

Wideband sounding

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Scattering Function Delay Power Profile Doppler Power Profile Channel Matrix Correlation

ej2πδft r[n]´ Se τc vc

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5. Results

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5 10 15 20 5 10 15 20 25 30 Time (UTC) Frequency (MHz) 10 20 30 40 50 60 70 80 90

Narrowband sounding

Availability (%): if SNR>3dB over the 70% of time or if SNR>6dB over the 50% of time

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5. Results

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Wideband sounding

Mean value for Delay Spread in ms Mean value for Doppler Spread in Hz

Scattering Function Delay Power Profile Doppler Power Profile Channel Matrix Correlation

ej2πδft r[n]´ Se τc vc

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5. Conclusions

This paper presents Narrowband: SNR and availability. Wideband: Time and Doppler scattering. This allow us to define fully the physical layer: Robust and high throughput mode. Future work Study the historical series for the entire solar cycle. End the design of the HF modem: modulation, coding and interleaving La Salle, Ramon Llull University (URL) - GRSETAD 15/15

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Finally

Thank you for your attention

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