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Abstract
筆者らは、ハイビジョン映像を無線伝送する番組撮影用ハイビジョンワイヤレスカメラ「ミリ波モバイルカメラ」の開発を進めている。このミリ波モバイルカメラの開発では、高画質・低遅延でのハイビジョン映像の途切れない無線伝送が要求されており、広帯域利用が可能なミリ波帯の利用と複数の送受信アンテナを用いたMIMO-OFDM伝送技術による途切れにくい大容量無線伝送を実現することを検討している。今回、十分な反射波が期待できない見通し環境でのミリ波モバイルカメラの運用を目的とし、屋外伝送実験を行ってミリ波モバイルカメラの伝送特性を測定するとともに、直交偏波を用いることでMIMO伝搬路のチャネル相関を抑制し、平均受信CNRに対する誤り率特性の向上を確認した。
A wireless High-Definition camera, which is called "a millimeter-wave mobile camera", is being developed for TV program production. In this development, High-Definition TV picture transmission with high quality, low latency and high link reliability is required, so examined is an application of MIMO-OFDM transmission scheme and Millimeter-wave for the camera. In this paper, for the purpose of making the camera used for TV program production in Line-of-Sight environment where enough reflect waves are not expected, the outdoor transmission performance of the wireless camera was measured and by using orthogonal polarized wave it was confirmed that MIMO channel correlation was reduced and the BER performance got better than before.
Journal
- ITE Technical Report [List of Volumes]
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ITE Technical Report 33(36), 1-6, 2009-09-24 [Table of Contents]
The Institute of Image Information and Television Engineers
