A Comparison of Lightwave, Microwave, and Coaxial Transmission Technologies

Jones, J. R.

doi:10.1109/tmtt.1982.1131285

Cited by 3 publications

(3 citation statements)

References 29 publications

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“…The system gain which is defined by the ratio of maximum transmitted power to the allowable minimum received power, may be estimated by using the noise limit and the available power level. The system gain for a typical example of a 45 Mb/s digital system is 103, 90 and 51 [dB] for the microwave, coaxial and lightwave techniques, respectively [1]. This shows that both coaxial and microwave systems have available system gain that is at least 39 dB greater than the lightwave systems.…”

Section: ) Signal To Noise Ratiomentioning

confidence: 98%

“…The microwave and coaxial cable techniques depend on voltage or current detection, whereas optical systems depend on power detection. The signal to noise ratio (S/N) v in the systems using voltage detection is given by [1]:…”

Section: ) Signal To Noise Ratiomentioning

confidence: 99%

“…Microwave systems need to efficiently use the available radio frequency spectrum. The bandwidths for available frequency bands are restricted for example, Federal Communication Committee (FCC) in U.S.A. states that the available bandwidth per channel ranges from 3.5 MHz up to 40 MHz according to the frequency band [1]. In addition, the atmospheric disturbances and multipath fading make this a relatively hostile environment for microwave transmission systems.…”

Section: ) Bandwidth Comparisonmentioning

confidence: 99%

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Fiber Optics, Microwave, and Coaxial Transmission Techniques

Hassan

Saad

1991

International Conference on Aerospace Sciences and Aviation Tec

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A comparison study on the three techniques has been done. The study is applied to a particular digital communication link of 280 km length and of 34 M bit/s transmission capacity. It is found that the fiber optic systems are inherently noiser than the others, and the available system gain is much less than it for the microwave and coaxial systems. However, the bandwidth advantage of fiber optics can be utilized through bandwidth expansion techniques to overcome the noise disadvantages. The low loss advantage allows using longer repreater span for fiber optic systems. The study showed that the optical system is less complex, and the coaxial one comes in the second rank. The estimate cost of the particular link gave that the optical fiber system is the least expensive one, whereas using the coaxial cable led to the most expensive system. For the proposed link, the estimated establishment time for microwave does not exceed 10% over the time needed for the other techniques.

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Section: ) Signal To Noise Ratiomentioning

confidence: 98%

Section: ) Signal To Noise Ratiomentioning

confidence: 99%

Section: ) Bandwidth Comparisonmentioning

confidence: 99%

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Fiber Optics, Microwave, and Coaxial Transmission Techniques

Hassan

Saad

1991

International Conference on Aerospace Sciences and Aviation Tec

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Physikalische Probleme der Informationsübertragung über Lichtleiter

Junge¹

1986

Annalen der Physik

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Prof. Dr. Robert R m p e zum 80. Geburtstag zugeeignetInhaltsiibersicht. Die herkommliche rein elektrische Ubertragungstechnik uber Kabel laBt technische und okonomische Grenzen erkennen. Die Suche nach neuen Kanalen fuhrte unter anderem in den optischen Bereich, zur Lichtleiter-Nachrichteniibertragung. Hierfiir sind in den letzten Jahren alle Elemente der ersten Generationen in umfangreicher Forschungsarbeit entwickelt worden. Dabei haben moderne Technologien der Mikroelektronik wesentlich zu den erzielten Ergebnissen bei der Herstellung der Lichtleit-Fasern und der opto-elektronischen Sende-und Empfangsbauelemente beigetragen. AbschlieBend werden Systemfragen und zukiinftige Zielstellungen behandelt. Physical Problems in Optical Fiber CommunicationsA b s t r a c t . Conventional electrical transmission of information by means of cables has technical and economic limitations. The search for new channels led, among other things, to the optical region, t o optical fiber communications. I n the last few years all parts of the first generations have been developed on the basis of extensive research. Modern technologies of microelectronics have thus contributed essentially to achieving the results in producing optical fibers and electro-optical elements for transmitters and receivers. Finally several questions of systems and future objectives are discussed.

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Low-noise receivers for fiber-optic microwave signal transmission

Cochran

1988

J. Lightwave Technol.

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The problem of low-noise reception of high-frequency narrow-band modulated optical radiation is discussed. Two topologies for the receiver are proposed, and the operation of each is described. Design characteristics are presented for S band receivers constructed using low capacitance photodetectors, and GaAs MESFET's. The performance of two experimental receivers was measured and found to be in reasonable agreement with design projections. Potential techniques for design optimization and extensions to other types of receiver front ends are considered.

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A Comparison of Lightwave, Microwave, and Coaxial Transmission Technologies

Cited by 3 publications

References 29 publications

Fiber Optics, Microwave, and Coaxial Transmission Techniques

Fiber Optics, Microwave, and Coaxial Transmission Techniques

Physikalische Probleme der Informationsübertragung über Lichtleiter

Low-noise receivers for fiber-optic microwave signal transmission

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