| 摘要 |
PROBLEM TO BE SOLVED: To resolve the problem that a product cost rises due to additional extension of antennas because a tuner circuit and a demodulation circuit are necessary for each antenna. SOLUTION: In an on-vehicle digital broadcasting receiver 1 provided with an OFDM circuit 10A (10B) for receiving and demodulating broadcast signals of an OFDM system, the OFDM circuit includes a first antenna 11a (11c); a second antenna 11b (11d); a first SW 12a (12c) and a second SW 12b (12d) for selecting broadcast signals passing the antennas; a tuner circuit 13A (13B) for tuning and receiving broadcast signals with the first SW and the second SW on; and an OFDM operation circuit 14A (14B) for demodulating and outputting the tuned and received broadcast signals, and a microcomputer 30 includes a selective diversity circuit, a maximum radio synthesis diversity circuit, a simple synthesis diversity circuit, and a control circuit for alternatively controlling the selective diversity circuit, the maximum radio synthesis diversity circuit, or the simple synthesis diversity circuit in accordance with a present reception environment. COPYRIGHT: (C)2006,JPO&NCIPI
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