| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To obtain a right positioning by searching a code phase and catching a direct wave code phase even when a multi-path wave is received indoors where a reception signal greatly attenuates, in a spectrum dispersion signal reception device performing a reverse dispersion by using a dispersion code to the reception signal. <P>SOLUTION: In an environment such as indoor position in which a direct wave signal greatly attenuates and a correlation of an indirect wave is larger than that of the direct wave, a provisional code phase of a maximum correlation peak point is detected. A plurality of correlation peak points existing in a vicinity of the provisional phase are further detected. The correlation peak point whose phase delay is the smallest is selected from among the detected correlation peak points to be caught as a code phase of the direct wave. <P>COPYRIGHT: (C)2005,JPO&NCIPI</p> |
