FM RELAY DEVICE

To provide a technique for suppressing interference waves of the same frequency represented by wraparound waves in a relay station of an FM broadcasting system that forms a single frequency network.SOLUTION: Receiving units (3A and 3B) receive broadcasting waves for FM synchronous broadcasting with...

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Bibliographische Detailangaben
Hauptverfasser: IWAKI SHOZO, MINEYOSHI TOSHIYUKI, ERA KATSUJI, OKUBO HIROSHI, UEDA DAIICHIRO, YAMANE MINORU, KONO KENJI, KAIJIMA MAKOTO
Format: Patent
Sprache:eng ; jpn
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Zusammenfassung:To provide a technique for suppressing interference waves of the same frequency represented by wraparound waves in a relay station of an FM broadcasting system that forms a single frequency network.SOLUTION: Receiving units (3A and 3B) receive broadcasting waves for FM synchronous broadcasting with two reception antennas (2A and 2B). A signal synthesizing unit (40) synthesizes two received signals obtained by the two reception antennas so that phases of interference wave components which are signal components based on interference waves are reversed-phases with each other and signal strengths of the interference wave components are the same. A signal reproduction unit (41) generates a transmission signal by demodulating the synthesized signal from the signal synthesizing unit and re-modulating the demodulated signal.SELECTED DRAWING: Figure 2 【課題】単一周波数ネットワークを構成するFM放送システムの中継所において、回り込み波に代表される同一周波数の干渉波を抑制する技術を提供する。【解決手段】受信部(3A,3B)は、FM同期放送用の放送波を、二つの受信アンテナ(2A,2B)を用いて受信する。信号合成部(40)は、二つの受信アンテナによって得られる二つの受信信号を、干渉波に基づく信号成分である干渉波成分の位相が逆相となり、かつ、干渉波成分の信号強度が一致するように合成する。信号再生部(41)は、信号合成部からの合成信号を復調し、復調した信号を再変調することで送信信号を生成する。【選択図】図2