| 摘要 |
PROBLEM TO BE SOLVED: To provide an arrival direction estimation device and an arrival direction estimation method capable of surely discriminating between the direct wave and reflected wave without complicating the constitution of hardware. SOLUTION: The vector r representing the set of wave signals arrived from the transmission terminal to a plurality of branches arranged as elements for receiving wave signals including sound waves and radio waves are determined. The matrix R representing the correlation of wave signals arrived from the transmission terminal is determined from the vector r and by processing the specific matrix operation on the matrix R, the intrinsic value of matrix R including the index relating to the reception power of arrived waves to the site and intrinsic vector corresponding to the intrinsic value is determined. The incoming wave to be estimated with its arrival direction is discriminated whether the incoming wave is directly incident on the site from the transmission terminal or not based on the value of the intrinsic value satisfies the condition or not which should be satisfied by receiving intensity of the direct incident wave signal. Only for the direct wave to be estimated, its arrival direction is estimated by using the intrinsic vector of the matrix R and its corresponding intrinsic value. COPYRIGHT: (C)2006,JPO&NCIPI
|
