CODE CORRELATOR, POSITIONING DEVICE, CODE CORRELATION METHOD, CODE CORRELATION PROGRAM, POSITIONING METHOD, AND POSITIONING PROGRAM

摘要

Provided is a code correlator which can perform code tracking with high precision by suppressing the influence due to multipath. BPSK replica code generation sections (312A, 313A) generate a BPSK replica code corresponding to a BPSK signal of PN code.  BOC replica code generation sections (312C, 313B) generate a BOC replica code corresponding to a BOC signal where a subcarrier is superimposed on the PN code.  Correlation sections (315A, 316A) generate a combined correlation value from a BPSK/BPSK correlation value which is obtained by correlating a received BPSK signal and a BPSK replica code, and a BPSK/BOC correlation value which is obtained by correlating a received BPSK signal and a BOC replica code.  A code phase difference calculation section (317) calculates the code phase difference based on the combined correlation value.