DocumentCode
769802
Title
Four-level heterodyne video systems: a comparison of DQPSK and 4-FSK
Author
Gross, Richard ; Enning, Bernhard ; Olshansky, Robert
Author_Institution
GTE Labs. Inc., Waltham, MA, USA
Volume
4
Issue
3
fYear
1992
fDate
3/1/1992 12:00:00 AM
Firstpage
284
Lastpage
286
Abstract
Experimental implementation of four-level heterodyne video systems using 4-ary FSK (frequency shift keying) are described and compared to DQPSK (differential quadrature phase-shift keying). The results show that the receiver sensitivity and complexity of the two systems are very similar. However, DQPSK provides a much higher spectral efficiency and is therefore preferable for video distribution systems.<>
Keywords
frequency shift keying; optical links; phase shift keying; video signals; visual communication; 4-FSK; DQPSK; complexity; differential quadrature phase-shift keying; four-level heterodyne video systems; frequency shift keying; receiver sensitivity; spectral efficiency; video distribution systems; Bandwidth; Frequency shift keying; Optical mixing; Optical pumping; Optical receivers; Optical sensors; Optical transmitters; Phase modulation; Stimulated emission; Voltage-controlled oscillators;
fLanguage
English
Journal_Title
Photonics Technology Letters, IEEE
Publisher
ieee
ISSN
1041-1135
Type
jour
DOI
10.1109/68.122394
Filename
122394
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