An Antarctica‐to‐Spain HF ionospheric radio link: Sounding results

Vilella, C.; Miralles, Damian; Pijoan, J.L.

doi:10.1029/2007rs003812

Cited by 32 publications

(105 citation statements)

References 15 publications

(18 reference statements)

Supporting

Mentioning

100

Contrasting

Order By: Relevance

“…Moreover, the whole transmission system has been entirely redesigned from the initial system deployed on the survey of 2003 to 2004 [4]. It was upgraded with faster and more reliable equipment during the 2009 to 2010 expedition.…”

Section: System Descriptionmentioning

confidence: 99%

“…In this work, the windows have been set to [−3.5, 3.5] (ms) and [−2.5, 2.5] (Hz), respectively, due to the maximum delay and Doppler spread values obtained in previous tests [4]. Next, the spread parameters are calculated.…”

Section: Wideband Analysismentioning

confidence: 99%

“…The channel availability is defined as the probability of a link to reach a minimum SNR value and, therefore, achieving a certain quality of service (see [15] for more details). A minimum SNR value of 6 dB was specified to estimate the channel availability in a bandwidth of 10 Hz [4]. In order to improve the reliability of the detection system, due to the probability of high noise and interference, several techniques were developed in [5].…”

Section: Narrowband Analysismentioning

confidence: 99%

“…For more details about the VIS soundings, see [13]. [4]. It is used to obtain useful and key parameters for modeling the HF radio link; i.e., link availability, power delay profile of the channel and frequency dispersion.…”

Section: Vertical Incidence Soundings Of the Ionospherementioning

confidence: 99%

“…In previous works, both narrowband and wideband soundings had been analyzed [4], but both carrier frequencies and the time of transmission were limited. Since 2008, an enhanced transmitter and receiver were installed [5], and the oblique sounding observations can be widely recorded.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

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

et al. 2015

View full text Add to dashboard Cite

La Salle and Ebro Observatory have been involved in remote sensing projects in Antarctica for the last 11 years (approximately one solar cycle). The Ebro Observatory has been monitoring and analyzing the geomagnetic and the ionospheric activity in the Antarctic Spanish station Juan Carlos I (ASJI) (62.7• S, 299.6• E) for more than eighteen and ten years, respectively. La Salle has two main goals in the project. The first one is the data transmission and reception from Antarctica to Spain to obtain a historical series of measurements of channel sounding of this 12,760-km ionospheric HF (high frequency) radio link. The second one is the establishment of a stable data low power communication system between the ASJI and Cambrils, Spain (41.0• N, 1.0 • E), to transmit the data from the remote sensors located on the island. In this paper, both narrowband and wideband soundings have been carried out to figure out the channel availability performed using a frequency range from 2 to 30 MHz with 0.5 MHz step during the 24 h of the day, encompassing wider channel measurements than previously done, in terms of hours and frequency. This paper presents the results obtained for the austral summer in 2014, using a monopole antenna at the transmitter and an inverted V on the receiver side. These results led us to the final physical layer design for the long Remote Sens. 2015, 7 11713 haul link, dividing the day into two parts: daytime, with low data throughput design, and nighttime, reaching high data throughput.

show abstract

Section: System Descriptionmentioning

confidence: 99%

Section: Wideband Analysismentioning

confidence: 99%

Section: Narrowband Analysismentioning

confidence: 99%

Section: Vertical Incidence Soundings Of the Ionospherementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

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

et al. 2015

View full text Add to dashboard Cite

show abstract

Sounding Methods in HF Sky Wave Communications

Orga¹,

Alsina-Pagès²,

Bergadà³

et al. 2022

Wiley Encyclopedia of Electrical and Electronics Engineering

View full text Add to dashboard Cite

The existence of the ionosphere as an electrically charged region in the atmosphere was suggested way back in 1839 by Friedrich Gauss. However, it was not until the 1920s that Edward Appleton proved that signals could be received without line of sight anywhere on the planet when emitting in high‐frequency ranges and by means of the ionosphere. The study of the ionosphere has widely attracted the interest of communication researchers due to its complexity regarding time and frequency dispersion. In this chapter, the techniques to characterize the ionospheric HF channel are reviewed. Also, the outcomes of the most relevant research projects working on that issue are provided. This chapter also gives the calculations required to conduct the study of channel availability, signal‐to‐noise ratio, multipath delay spread, and Doppler spread. Finally, the outcomes of these calculations are provided for a real case study involving a 12 760‐km long‐haul link from Antarctica to Europe.

show abstract

Digital transmission techniques for a long haul HF link: DSSS versus OFDM

et al. 2014

Self Cite

View full text Add to dashboard Cite

This paper presents two digital transmission techniques for long haul ionospheric links. Since 2003 we have studied the HF link between the Antarctic Spanish Base, Juan Carlos I, and Spain; and we have described the link in terms of availability, signal-to-noise ratio, and delay and Doppler power profile. Based on these previous studies we have developed a test bed to investigate two digital transmission techniques, i.e., Direct-Sequence Spread Spectrum (DSSS) and Orthogonal Frequency Division Multiplexing (OFDM), which can provide a low power, low-rate ionospheric data link from Antarctica. Symbol length, bandwidth, and constellation are some of the features that are analyzed in this work. Data gathered from the link throughout the 2010/2011 and 2011/2012 Antarctic surveys show that the spread spectrum techniques can be used to transmit data at low rate when the channel forecast is poor, but when the channel forecast is good multicarrier techniques can be used to transmit sporadic bursts of data at higher rate.

show abstract

An Antarctica‐to‐Spain HF ionospheric radio link: Sounding results

Cited by 32 publications

References 15 publications

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

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

Sounding Methods in HF Sky Wave Communications

Digital transmission techniques for a long haul HF link: DSSS versus OFDM

Contact Info

Product

Resources

About