| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a GNSS receiving apparatus capable of widening a range of values of code phase differences which a code initial value can take on when using BOC signals. <P>SOLUTION: A code phase difference detection part 250 computes an E+L correlation value on the basis of the sum of an E-correlation value and an L-correlation value. The code phase difference detection part 250 sets a correction coefficient by multiplying the E+L correlation value by a constant K and adding the product to a P-correlation value. The code phase difference detection part 250 computes a dot product computation value by multiplying a set correlation coefficient by an E-L correlation value made of the difference between the E-correlation value and the L-correlation value. At this time, a phase difference τ2 which determines an Early code signal as a source of the E-correlation value and an Late code signal as a source of the L-correlation value and the constant K are set at such values as to correct the negative-value region of P-correlation characteristics by the positive value regions of the E-correlation value and the L-correlation value and expand them in the direction of positive values. <P>COPYRIGHT: (C)2010,JPO&INPIT |
