地上デジタルテレビ放送波の長距離光ファイバ伝送実現のための検討およびフィールド実験

概要

論文の詳細を見る
Numerous TV relay stations are required for digital terrestrial broadcasting services in mountainous regions and these are expensive to construct. To reduce their cost, we propose a system that can retransmit UHF-band terrestrial digital TV signals (OFDM<Orthogonal Frequency Division Multiplex>signals: nine channels) sent via long-distance (340km) optical-fiber networks. Weverified its exceptional performance through experiments. This system uses an LD direct optical modulator to reduce the construction costs and has a high equivalent C/N of about 40dB and very low distortion, which are traditionally considered to be very difficult to achievewith direct modulation. We attained these by adopting an optimum design to acquire a high C/N and wavelength dispersion compensation to transmit the OFDM signals.
社団法人映像情報メディア学会の論文
2008-06-01