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, ([email protected])
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Narrowband and Wideband Channel Sounding of an Antarctica
to Spain Ionospheric Radio LinkM. 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,
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
Antarctic Project
Long-haul link between Antarctica to Spain to transmit data from remote sensors.
Oblique Ionospheric Sounder
12.760Km
1. Introduction
La Salle, Ramon Llull University (URL) - GRSETAD 3 /15
1. Introduction
4 /15La Salle, Ramon Llull University (URL) - GRSETAD
20 km
20 mi
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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WidebandDoppler Spread
Multipath Delay Spread
4. Data Analysis
Narrowband sounding
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t0 t1 t2 t3 t4 t5 t6 t7 t8 t9idle1 idle2idle0 idle3
Kaiser windowing of 10 Hz of BW
Signal is measured in 10 slot t0-t9
Noise is measured in 4 idle slots
0 5 10 15 20
5
10
15
20
25
30
Hours (UTC)
SNR of file->17/02
Fre
quency (
MH
z)
0
5
10
15
20
25
30
35
Night Sunrise Day Sunset Night
4. Data Analysis
Narrowband soundingSNR (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
5. Results
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0 5 10 15 20
5
10
15
20
25
30
Time (UTC)
Fre
quency (
MH
z)
0
10
20
30
40
50
60
70
80
90
Narrowband soundingAvailability (%):
if SNR>3dB over the 70% of time or if SNR>6dB over the 50% of time
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
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
Finally
Thank you for your attention
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