Damson HF channel characterisation-a review

Cannon, Paul S.; Angling, Matthew; Davies, N.C.; Wilink, T.; Jodalen, V.; Jacobson, B.; Lundborg, Bengt; Broms, M.

doi:10.1109/milcom.2000.904913

Cited by 19 publications

(16 citation statements)

References 5 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Warrington et al [103] and Jodalen et al [104], amongst others, also provide a thorough channel analysis for high latitudes NVIS paths. Jodalen et al [104] presents the results from a propagation experiment over two NVIS paths in Northern Scandinavia using Doppler and Multipath SOunding Network (DAMSON) [105], with the aim of correlating the results of both paths. Warrington et al [103] presents direction finding measurements in Norway and Sweden, to better understand the directional characteristics of HF signals reflected in the high-latitude ionosphere.…”

Section: Nvis Channel Characteristics As Function Of the Latitudementioning

confidence: 99%

“…Hervas et al [56] performs mid-latitude NVIS channel soundings using a Lowell Digisonde [82], obtaining information about Doppler and multipath delay spread, and the best possible transmission frequency as function of the hour of the day. Austin [15] describes the performance of the equatorial ionosphere, and finally, in [105] channel sounding with the DAMSON system was used to evaluate polar, mid-latitude and equatorial propagation channels for the use of 12 kHz wide HF broadcast systems operating on fixed frequencies and requiring high availability.…”

Section: Nvis Channel Characteristics As Function Of the Latitudementioning

confidence: 99%

See 1 more Smart Citation

Radio communication via Near Vertical Incidence Skywave propagation: an overview

Witvliet

Alsina-Pagès

2017

Telecommun Syst

View full text Add to dashboard Cite

Section: Nvis Channel Characteristics As Function Of the Latitudementioning

confidence: 99%

Section: Nvis Channel Characteristics As Function Of the Latitudementioning

confidence: 99%

Radio communication via Near Vertical Incidence Skywave propagation: an overview

Witvliet

Alsina-Pagès

2017

Telecommun Syst

View full text Add to dashboard Cite

“…However, 32 bit packets have several advantages, especially taking into account coherent fading. At the slow transmission rate, a 64-bit packet takes 15.6ms to transmit, corresponding to a maximum Doppler spread of 32 Hz, well below the occasional peaks measured in, for example, [5]. As such, we should expect a reasonable number of extra packets lost to coherent fading with the selection of 64 bit packets over 32 bit packets.…”

Section: A Packetizationmentioning

confidence: 96%

Cross-layer design to maintain earthquake sensor network connectivity after loss of infrastructure

Steinbrecher

2012

MILCOM 2012 - 2012 IEEE Military Communications Conference

View full text Add to dashboard Cite

Abstract-We present the design of a cross-layer protocol to maintain connectivity in an earthquake monitoring and early warning sensor network in the absence of communications infrastructure. Such systems, by design, warn of events that severely damage or destroy communications infrastructure. However, the data they provide is of critical importance to emergency and rescue decision making in the immediate aftermath of such events, as is continued early warning of aftershocks, tsunamis, or other subsequent dangers. Utilizing a beyond line-of-sight (BLOS) HF physical layer, we propose an adaptable cross-layer network design that meets these specialized requirements. We are able to provide ultra high connectivity (UHC) early warning on strict time deadlines under worst-case channel conditions along with providing sufficient capacity for continued seismic data collection from a 1000 sensor network.

show abstract

“…The DAMSON sounder was used to determine the optimal transmission frequency set in adaptive HF systems. However, only links from 200 to 2000 km were tested, and longer links use larger sets of frequencies due to the different latitudes that need to be adapted [13].…”

Section: Introductionmentioning

confidence: 99%

Interannual Variation of a 12,760 km Transequatorial Ionospheric Channel Availability and Its Dependence on Ionization

Orga

Altadill

Hervás

et al. 2016

Proceedings of the 1st International Electronic Conference on Atmospheric Sciences

View full text Add to dashboard Cite

Abstract:The ionosphere provides a channel able for long-haul and Non-Line-Of-Sight (NLOS) communications. Nonetheless, the amount of ionization depends on the Sun activity, whose diurnal and seasonal cycles transform the channel constantly. La Salle and the Observatori de l'Ebre have been sounding a 12,760 km ionospheric channel from Antarctica (62.7°S, 299.6°E) to Spain (41.0°N, 1.0°E) in order to find this evidence and to analyze the characteristics of this particular channel. The final goal of the project is to establish a stable communications link to be used as backup or for low rate data transmission. The aim of this paper is to prove the relation between the channel availability and the Sun phenomena affecting the ionization in four consecutive sounding campaigns.

show abstract

Damson HF channel characterisation-a review

Cited by 19 publications

References 5 publications

Radio communication via Near Vertical Incidence Skywave propagation: an overview

Radio communication via Near Vertical Incidence Skywave propagation: an overview

Cross-layer design to maintain earthquake sensor network connectivity after loss of infrastructure

Interannual Variation of a 12,760 km Transequatorial Ionospheric Channel Availability and Its Dependence on Ionization

Contact Info

Product

Resources

About