Satellite communications to mobile platforms

Lebow, Irwin; Jordan, K.; Drouilhet, P. R.

doi:10.1109/proc.1971.8121

Cited by 21 publications

(2 citation statements)

References 15 publications

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“…If transmissions are synchronised and each subscriber uses orthogonal hopping patterns [82], then each frequency is used only once, minimising mutual interference and maximising the number of subscribers. However, the implementation of synchronised transmissions introduces severe organisation difficulties, and it has been found that random access gives equivalent performance [83].…”

Section: Waveform Codingmentioning

confidence: 99%

Introduction to electronic warfare

Grant

Collins

1982

IEE Proc. F Commun. Radar Signal Process. UK

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The paper discusses the overall concept of electronic warfare (EW) and defines its three main subsets: electronic support measures (ESM), electronic countermeasures (ECM) and electronic counter-countermeasures (ECCM). The requirements for ESM receivers are reviewed in the context of two specific scenarios: that of intelligence gathering for communications and radar. The different current ESM receiver designs for measuring the presence and frequency of pulsed radar signals, i.e. crystal video, instantaneous-frequency measurement (IFM) and scanning superheterodyne, are described and compared to show their capabilities. Specific ESM receiver equipments for identifying bearing and frequency information are discussed for both the communications and radar scenarios. In comparison, the significance of the new receiver architectures based on surface-acoustic-wave (SAW) channelised, compressive and acousto-optic Bragg cells are also discussed, illustrating their enhanced multiple-signal capability. The paper subsequently discusses active and passive EW techniques such as the use of jamming and chaff and the importance of integrating the ESM receiver and active ECM function into a single equipment. Finally, the paper reports on the use of ECCM coding techniques to retain use of the spectrum when jammers are present in radar and communications systems. The use of adaptive signal processing for cancelling out wide-and narrowband interference is also demonstrated. This outlines the relative significance and areas of application for adaptive antennas, based on fully phased arrays and coherent sidelobe cancellers.

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Section: Waveform Codingmentioning

confidence: 99%

Introduction to electronic warfare

Grant

Collins

1982

IEE Proc. F Commun. Radar Signal Process. UK

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“…Several studies have considered satellite communications for small mobile users, in general [1]- [3], and maritime mobile users, in particular [4]- [16]. Among these, a sixvolume study [8], which was prepared for the U. S. Coast Guard by Automated Marine International (AMI), contains a wealth of statistical data and tradeoff analyses.…”

Section: Introductionmentioning

confidence: 99%

Maritime Communications via Satellites Employing Phased Arrays

Durrani¹

1973

IEEE Trans. Aerosp. Electron. Syst.

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This paper examines the feasibility of providing maritime mobile telecommunications as a new service via satellites. A global system with a capacity of 10 duplex voice/data channels (plus an interrogation/reply channel) per satellite is described. The capability is achieved with a 0-dB gain UHF antenna in the ship and a UHF phased array in the satellite, which produces 11 steerable beams, each with 30-dB peak gain. The links between satellite and shore are assumed to be at SHF. A dedicated satellite weighs 320 kg, which can be launched with an up-rated Thor-Delta. The prime power requirement of 730 watts is provided by an oriented solar array.

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The role of surface acoustic wave technology in communication systems

Collins¹,

Grant²

1972

Ultrasonics

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Satellite communications to mobile platforms

Cited by 21 publications

References 15 publications

Introduction to electronic warfare

Introduction to electronic warfare

Maritime Communications via Satellites Employing Phased Arrays

The role of surface acoustic wave technology in communication systems

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