发明名称 |
METHOD AND DEVICE FOR MEASUREMENT OF PROPAGATION DELAY CHARACTERISTIC IN MULTIPATH PROPAGATION ENVIRONMENT, AND EXTERNAL AUDIO PERCEPTION DEVICE |
摘要 |
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. |
申请公布号 |
US2016142817(A1) |
申请公布日期 |
2016.05.19 |
申请号 |
US201414899053 |
申请日期 |
2014.06.16 |
申请人 |
NATIONAL INSTITUTE OF ADVANCED INDUSTRIAL SCIENCE AND TECHNOLOGY |
发明人 |
HOTEHAMA Takuya;NAKAGAWA Seiji |
分类号 |
H04R1/46;H04R29/00;H04B17/364;H04R3/04 |
主分类号 |
H04R1/46 |
代理机构 |
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代理人 |
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主权项 |
1. 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. |
地址 |
Chiyoda-ku, Tokyo JP |