RADIO WAVE COMING ANGLE DETECTION DEVICE, VEHICLE DETECTION SYSTEM, RADIO WAVE COMING ANGLE DETECTION METHOD AND VEHICLE ERRONEOUS DETECTION PREVENTION METHOD

摘要

PROBLEM TO BE SOLVED: To provide a radio wave coming angle detection apparatus for an OFDM (orthogonal frequency-division multiplexing) carrier wave.SOLUTION: The radio wave coming angle detection device extracts symbols and analyzes the same into frequency components each having subcarrier on each of OFDM carrier waves received by a first antenna and a second antenna, and calculates a coming angle of the carrier wave based on a geometric relationship in the phase difference between the subcarriers of the OFDM carrier waves received by the first antenna and the second antenna and the disposition of the first antenna and the second antenna.SELECTED DRAWING: Figure 2