屋内における地上ディジタルテレビジョン放送波の測定

摘要

屋内用の地上ディジタルテレビジョン放送波の受信用の最適なアンテナを設計するためには，屋内における放送波の電波環境を検討する必要がある．本報告では屋内における地上ディジタル放送波の受信電力を測定し，その分布を示す．また，2つのアンテナを置くものと仮定して，得られた受信電力の測定値から相関係数を求め，部屋の中での相関係数の一番小さいアンテナの配置を示し，累積分布（Cumulative Distribution Function，CDF）から選択ダイバーシチ受信の効果を示す．%To design an optimum indoor receiving antenna for digital terrestrial television broadcasting, it is necessary to evaluate radio wave environment of broadcasting wave for indoor reception. In the present report, receivied power of the digital terrestrial broadcasting wave is measured and its distribution is shown in a room. The correlation coefficient between the received powers of two receiving antennas is also evaluated by using the distribution of the received power and assuming two receiving antennas. Finally, the effect of selection diversity reception is obtained by using cumulative distribution function of the received power.