出版社：The Institute of Image Information and Television Engineers
摘要：If terrestrial digital broadcasting services are available at ships used for transportation, they will be very useful and convenient for gathering information including during disasters. We studied and investigated to realize stable reception of digital TV waves and re-transmission technology at ships connecting Hiroshima-Matsuyama. As a result, BER degradation of unexpected multi-path waves with over guard interval length, adjacent channel interference, and large level changes of electric fields that are characteristics of mobile ship reception occurred. Therefore, shielding undesired waves using the ship structure and selection of receiving antennas in accordance with electric field strength and so on are taken. Through these countermeasures, digital TV waves can be received at 90% on all lines and one segment reception can be available for the whole cabin of a ship by retransmission.
