Patent ID: 8081708

Claim:
A reradiation apparatus for terrestrial digital broadcasting which is carried in a train, receives a terrestrial digital broadcasting signal and reradiates the terrestrial digital broadcasting signal in the train, the reradiation apparatus for the terrestrial digital broadcasting comprising: plural antennas for receiving the terrestrial digital broadcasting signal, the antennas being provided on the train and being spaced mutually along a running direction of the train, and one of the antennas being provided at a rear of the train; plural receiving processing parts for receiving the terrestrial digital broadcasting signals received by the antennas, the receiving processing parts being provided corresponding to the antennas respectively; a switch part for choosing one terrestrial digital broadcasting signal from the terrestrial digital broadcasting signals received by the plural receiving processing parts; a master selecting part for setting the receiving processing part corresponding to the antenna provided at the rear of the train as a master receiving processing part and setting other receiving processing parts as slave receiving processing parts; a monitoring part for monitoring the received state of the terrestrial digital broadcasting signal received by the receiving processing part set as the master receiving processing part, and outputting a supervisory signal showing whether the terrestrial digital broadcasting signal is receivable or unreceivable by the set master receiving processing part; a controller for controlling the switch part so that the switch part chooses the terrestrial digital broadcasting signal received by the receiving processing part set as the master receiving processing part when the supervisory signal shows the terrestrial digital broadcasting signal is receivable by the set master receiving part, and so that the switch part chooses the terrestrial digital broadcasting signal received by the other receiving processing part when the supervisory signal shows the terrestrial digital broadcasting signal is unreceivable by the set master receiving processing part; and a reradiation unit for reradiating the terrestrial digital broadcasting signal chosen by the switch part in the train.