POSITIONING METHOD OF UNKNOWN SIGNAL GENERATOR BASED ON TDOA METHOD

• Main Authors: KANG, HEE WON, LIM, DEOK WON, HEO, MOON BEOM
• Format: Patent
• Language: English; Korean
• Published: 21.01.2013
• 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

PURPOSE: A position measuring method of an unknown signal source based on TDOA(time difference of arrival) is provided to reduce influence of a sampling cycle, thereby accurately finding the position of the unknown signal source. CONSTITUTION: A position measuring method of an unknown signal source based on TDOA comprises the following steps: An unknown signal is received from multiple sensors (S100). A cross correlation on the discrete delay time is performed for the obtained signal, the value of cross correlation is obtained, and the value of target function is calculated (S200). A reference sensor is chosen to produce a TDOA measured value (S300). A delay time cross correlation is performed for each received signal in the chosen sensor and another sensor, and the time when the cross correlation value is maximum is calculated (S400). The position of the unknown signal source is measured by using the TDOA measured value (S500). [Reference numerals] (S100) Step of obtaining data; (S200) Step of calculating the value of a target function; (S300) Step of selecting a reference sensor; (S400) Step of calculating a TDOA measured value; (S500) Step of measuring a position