Doppler effects on high latitude HF paths during an ionospheric disturbance

Broms, M.; Lundborg, Bengt; Jodalen, V.; Bergsvik, Torgeir

doi:10.1049/cp:19970764

Cited by 4 publications

(2 citation statements)

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“…The results for Doppler spread and Doppler shift during the campaign between 16 and 22 of October in 1995 is presented in Reference [39], where a disturbance takes place whereby the geomagnetic Q index reached values of 7 for several hour. This work demonstrated that the values of Doppler spread and shift are positively correlated with the level of disturbance.…”

Section: Results and Conclusionmentioning

confidence: 99%

Ionospheric Narrowband and Wideband HF Soundings for Communications Purposes: A Review

Hervás

Bergadà

Alsina-Pagès

2020

Sensors

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High Frequency (HF) communications through ionospheric reflection is a widely used technique specifically for maritime, aeronautical, and emergency services communication with remote areas due to economic and management reasons, and also as backup system. Although long distance radio links can be established beyond line-of-sight, the availability, the usable frequencies and the capacity of the channel depends on the state of the ionosphere. The main factors that affect the ionosphere are day-night, season, sunspot number, polar aurora and earth magnetic field. These effects impair the transmitted wave, which suffers attenuation, time and frequency dispersion. In order to increase the knowledge of this channel, the ionosphere has been sounded by means of narrowband and wideband waveforms by the research community all over the world in several research initiatives. This work intends to be a review of remarkable projects for vertical sounding with a world wide network and for oblique sounding for high latitude, mid latitude, and trans-equatorial latitude.

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Section: Results and Conclusionmentioning

confidence: 99%

Ionospheric Narrowband and Wideband HF Soundings for Communications Purposes: A Review

Hervás

Bergadà

Alsina-Pagès

2020

Sensors

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“…It is reflected as the average bit error rate. Table 1 V6-474 shows some typical links transmission performance values searched from [2,[7][8][9][10][11]. Performance ( Ig e, ) -4--5 -3--5 -4--6 -2--8…”

Section: A Link Parameter Modelmentioning

confidence: 99%

Network topology based on information security for Network Centric Warfare simulation

Peng

Han

Gong

et al. 2010

2010 3rd International Conference on Advanced Computer Theory and Engineering(ICACTE)

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Ahstract-Thispaper presents a Multi-Link Topology (ML T) control algorithm for Network Centric Warfare (NCW) system based on information security. This method explains the complexity of communication links for NCW well. To accurately study the communication performance in HLA/RTI framework by the network simulators for real-time NCW simulation, it is important to simplify the network links topology through discarding the unnecessary communication links. The proposed algorithm takes several typical military communication links as target and optimizes the links according to the information security satisfaction degree with network connectivity unchanged. The simulation results showthat the algorithm has good links optimization ability with the average optimization rate more than 50%.

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Aspects on Wideband Multi-Carrier Communication

Nilsson

1997

Multi-Carrier Spread-Spectrum

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Doppler effects on high latitude HF paths during an ionospheric disturbance

Cited by 4 publications

References 0 publications

Ionospheric Narrowband and Wideband HF Soundings for Communications Purposes: A Review

Ionospheric Narrowband and Wideband HF Soundings for Communications Purposes: A Review

Network topology based on information security for Network Centric Warfare simulation

Aspects on Wideband Multi-Carrier Communication

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