| 摘要 |
<P>PROBLEM TO BE SOLVED: To reduce power consumption while maintaining the reception quality of reception data even during driving of a vehicle. <P>SOLUTION: An on-vehicle receiving device (1) has: a plurality of reception systems (10) provided so as to correspond to a plurality of antennas installed to a vehicle; a demodulation processing circuit (20) for combining reception signals received by the reception systems (10) and demodulating reception data; and a calculation part (60) in which a plurality of influence items affecting the reception quality are preliminarily defined, and a weighting factor for determining a required number of reception systems is set for each influence item while associating with a reception status indicated by the influence item, and which determines each weighting factor from the reception status indicated by each influence item during driving of the vehicle, and calculates the required number of reception systems in a current communication environment by using the determined weighting factor. <P>COPYRIGHT: (C)2013,JPO&INPIT |
