POSITIONING SIGNAL DETECTION METHOD, POSITIONING SIGNAL DETECTION PROGRAM, POSITIONING SIGNAL RECEIVING DEVICE, POSITIONING APPARATUS AND INFORMATION DEVICE TERMINAL

• Main Authors: NAKAO HIROYUKI, YAMASHINA KATSUHISA
• Format: Patent
• Language: Chinese; English
• Published: 12.11.2014
• Subjects: ANALOGOUS ARRANGEMENTS USING OTHER WAVES; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION ORRERADIATION OF RADIO WAVES; MEASURING; PHYSICS; RADIO DIRECTION-FINDING; RADIO NAVIGATION; TESTING

The invention aims to accurately determine whether a received positioning signal is a target positioning signal. A first code phase difference using a first replica code signal of a positioning signal (StA(CODEA)) and a second code phase difference using a second replica code signal of a positioning signal (StB(CODEB)) are acquired (S101). A first pseudo range (rho1) is calculated from the first code phase difference, and a second pseudo range (rho2) is calculated from the second code phase difference (S102). The absolute value of a pseudo range difference that is the difference value between the first pseudo range (rho1) and the second pseudo range (rho2) is calculated. If the absolute value of the pseudo range difference is a threshold value (THc) or less (S103: YES), positioning signals being subjected to code tracking are determined to be the positioning signals (StA(CODEA), StB(CODEB)) from a target positioning satellite (SATt) (S104). If the absolute value of the pseudo range difference is more than the