講演抄録/キーワード |
講演名 |
2006-03-09 11:20
長良デジタル中継局における回り込みキャンセラの動作検証 ○今村浩一郎・竹内知明・横畑和典・成清善一・濱住啓之・渋谷一彦・石井 真・安藤嘉高・江口直孝(NHK) |
抄録 |
(和) |
地上デジタル放送を円滑かつ低コストで全国展開していくために,NHKでは,SFN放送波中継で問題となる送受アンテナ間での電波の回り込みによる干渉妨害を除去する回り込みキャンセラの研究開発を続けてきた.今回,開発した回り込みキャンセラを岐阜県の長良中継局に導入し,2005年12月26日の本放送開始日に実際に運用を行った.本報告では,本放送開始前の試験電波発射期間中に測定したSFN放送波中継の伝送特性について述べる. |
(英) |
To deliver the DTTB (Digital Terrestrial Television Broadcasting) signal throughout Japan in lower coast, broadcast-wave relay is desired for SFN (Single Frequency Network). However, interference caused by coupling between transmitting and receiving antennas (CLI: Coupling Loop Interference) is a serious issue in SFN broadcast-wave relay (on-channel repeat). For that reason, CLI canceller has been researched and developed in NHK.
Now, the CLI canceller has been introduced into Nagara relay station at Gifu Prefecture. This paper describes the transmission characteristics of SFN broadcast-wave relay which were measured during trial transmission period. The CLI canceller was practically used on December 26, 2005, the day of cutover to formal transmission. |
キーワード |
(和) |
回り込みキャンセラ / SFN / 放送波中継 / 回り込み / 地上デジタル放送 / OFDM / / |
(英) |
Coupling Loop Interference / CLI Canceller / On-channel Repeater / SFN / Broadcast-wave Relay / On-air Relay / DTTB / OFDM |
文献情報 |
信学技報, vol. 105, no. 643, EMCJ2005-142, pp. 27-30, 2006年3月. |
資料番号 |
EMCJ2005-142 |
発行日 |
2006-03-02 (EMCJ) |
ISSN |
Print edition: ISSN 0913-5685 |
PDFダウンロード |
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