800MHz帯OFDM-FPUによるマラソン生中継システム : 東京ハーフマラソン・東京国際マラソン

概要

論文の詳細を見る
By introducing 800MHz COFDM(Coded Orthogonal Frequency Division Multiplexing)FPUs(Field Pick-up Units), the overall transmission system for the "Tokyo Marathon" has been significantly simplified. The number of necessary relay transmission sites has been reduced by about 80% and a link helicopter is no longer required. This is because the COFDM modulation scheme has excellent characteristics in a multi-path fading channel such as mobile links even within a large metropolitan environment like Tokyo and the transmission links with it are not disrupted when passing under bridges and approaching obstacles(buildings, trees, etc.). This paper describes a comparison of live trasmission system configulation with typical analog FPUs and with the COFDM-FPUs for two separate marathons. And the method for designing transmission links with COFDM and propagation characteristics in an urban region is also mentioned.
社団法人映像情報メディア学会の論文
1999-07-21