Patent ID: 7480483
Filing Date: 2009-01-20
Classification: H04H,Y02D

Abstract:
1. A mobile broadcast receiving apparatus which selectively receives broadcast radio waves from a geostationary satellite or radio waves retransmitted from a gap filler according to a reception level thereof, the apparatus comprising: a low-noise amplifier circuit which low-noise amplifies a received signal; a level detection unit which detects the reception level; a received wave discrimination unit which determines whether the wave being received is the broadcast radio wave from the geostationary satellite or the radio wave retransmitted from the gap filler; and a range switching unit which switches a dynamic range of the low-noise amplifier circuit to a lower range when either the reception level detected by the level detection unit is not higher than a preset range switching level, or the received wave discrimination unit determines that the wave being received is the broadcast radio wave from the geostationary satellite, and switches the dynamic range of the low-noise amplifier circuit to an upper range when the reception level detected by the level detection unit is higher than the preset range switching level and the received wave discrimination unit determines that the wave being received is the radio wave retransmitted from the gap filler.