New type of DBS receiver utilizing optical fiber as IF transmission line

Ikeda, Hiroaki; Rabou, N.A.; Yoshida, H.; Shinohara, S.; Tsuchiya, E.

doi:10.1109/30.179967

Cited by 8 publications

(1 citation statement)

References 6 publications

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“…The audio and video signals can be transmitted through an optical fiber after converted into the optical FM signal by using an LED and a VCO (1)- (3). This concept, however, is mainly used to transmit the camera output video signal and/or the IF signal of the DBS receiver.…”

Section: Introductionmentioning

confidence: 99%

Multiple FM-video signal transmission through optical fiber for use in security

Mochizuki

Ikeda

Yoshida

et al.

Proceedings of 36th Midwest Symposium on Circuits and Systems

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Described is a dual FM video signal transmission system with an optical fiber for use in monitoring pictures for security purpose. Each video signal from each video camera is modulated by the FM scheme actualized by using a VCO operating at 30 MHz or 50 M E , and the modulated RF video signal is sent to the optical fiber through the electrical-to-optical converter consisting of an LED at 850 nm. The optical FM video signal is received by using the optical-to-electrical converter. Each received FM video signal is demodulated by using a PLL to reproduce the video signal. The camera mount attitude for one of a pair of video cameras can be adjusted by the optical control signal issued from the monitoring site.

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Section: Introductionmentioning

confidence: 99%

Multiple FM-video signal transmission through optical fiber for use in security

Mochizuki

Ikeda

Yoshida

et al.

Proceedings of 36th Midwest Symposium on Circuits and Systems

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New type of optical fibre analogue SSB data communication system using edge-emitting LED coupled to single-mode optical fibre

Nishio

Rabou

Ikeda

et al. 1999

Int. J. Commun. Syst.

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This paper describes a single-mode(SM) optical fibre SSB data communication system for use in place of power-line data transmission. In the optical transmitter, SSB data is fed through the squarewave frequency (SWFM) modulator to the edge-emitting LED (ELED) module. The light beam of the ELED module is fed to the SM optical fibre having a length of 12 km. In the optical receiver, the light beam received through the SM optical fibre is detected by the PIN photodiode module, and fed to the SWFM detector to obtain the double-pulse frequency modulation (DPFM) signal voltage. The DPFM signal voltage at the output of the SWFM detector is fed to the low-pass filter (LPF) to obtain analogue SSB data. When the transmission was experimentally carried out, the spurious component was as low as !50-!70 dB and the SNR of SSB data as high as more than 65-70 dB. The optical transmitter and receiver were attached to the conventional analogue SSB data communication system to constitute a new optical fibre analogue SSB data communication system. During the field test utilizing the new system, the crosstalk and SNR were 60-70 dB and 60-70 dB on each channel, respectively.

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