| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a radio receiver and a GPS receiver for enhancing positioning accuracy by surely determining an influence of a multipath of received radio waves from GPS satellites. <P>SOLUTION: This receiver is structured so that signal processing parts 15a to 15n severally demodulate received signals from the plurality of GPS satellites by an output from a high-frequency wave reception part 14 to find information signal data from the respective GPS satellites included in the respective received signals and the levels of the respective received signals. A multipath determining/processing part 16 finds level differences between each of received signals of the processing parts 15a to 15n when using a dextrorotatory-circular-polarization antenna 11 and each of corresponding received signals when using a linear-polarization antenna 12. The degree of effect of the multipath on the received radiowave is thereby determined and the determination result is used to select a GPS satellite, a radio wave received from which is less affected by the multipath. A positioning calculation part 18 calculates a present position based on information signal data acquired based on the received radio wave of the selected GPS satellite. <P>COPYRIGHT: (C)2005,JPO&NCIPI |
