PROBLEM TO BE SOLVED: To attain a code correlation unit capable of suppressing an influence by short-delay multipath.;SOLUTION: A P replica code, E1, L1 replica codes at a chip interval d/2 on the basis of the P replica code, E2, L2 replica codes at a chip interval d on the basis of the P replica code, and VE1, VL1, VE2, VL2 replica codes which are delayed to the E1, L1, E2, L2 replica codes by two chips, respectively are generated. Correlation processing between each replica code and an IF signal is performed to output a correlation level which is each correlation processing result. Phase difference detection characteristics in which phase difference detection results constantly become zero in a predetermined section including a 1.0 chip by performing predetermined arithmetical operations is attained by combining a P correlation level, an E1 correlation level, an L1 correlation level, an E2 correlation level, an L2 correlation level, a VE1 correlation level, a VL1 correlation level, a VE2 correlation level, a VL2 correlation level.;COPYRIGHT: (C)2012,JPO&INPIT
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