Title:
The external sound consciousness method and an external sound consciousness device
Document Type and Number:
Japanese Patent JP6214012
Kind Code:
B2
Abstract:
A method for measuring propagation delay characteristics in a multipath propagation environment, wherein the propagation delay characteristics are measured between a transmission means and a reception means provided in the multipath propagation environment, the method comprising a transmission step of transmitting a measurement signal comprising an information signal having a predetermined frequency from the transmission means; a reception step of receiving the measurement signal that has traveled along a plurality of propagation paths by the reception means; a calculation step of performing Hilbert transform on the received information signal to calculate instantaneous frequency characteristics from a resulting Hilbert transform signal; and an output step of outputting propagation delay characteristics corresponding to the frequency of the information signal based on the instantaneous frequency characteristics.
Inventors:
Takuya Hotehama
Seiji Nakagawa
Seiji Nakagawa
Application Number:
JP2015522909A
Publication Date:
October 18, 2017
Filing Date:
June 16, 2014
Export Citation:
Assignee:
National Institute of Advanced Industrial Science and Technology
International Classes:
H04B17/309; G10L25/18; H04R25/00
Domestic Patent References:
| JP2000181472A |
Foreign References:
| EP2169424A1 |
Other References:
ZEGER et al.,‘Effect of Multipath Interference on an FM Data Subcarrier.’,In: Proc. of IEEE Communications, Computers and Signal Processing, 1997. 10 Years PACRIM 1987-1997-N,IEEE,1997年 8月20日,Vol.1,p.p.40-44
Attorney, Agent or Firm:
Patent business corporation Arole International