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A platform for research: civil engineering, architecture and urbanism
PROBLEM TO BE SOLVED: To provide a propagation distance estimation device capable of improving estimation accuracy of propagation distance.SOLUTION: A base station 1 transmits a ranging signal X(t) to a terminal 2 and has the terminal 2 return the ranging signal X(t). If there is a clock error between the base station 1 and the terminal 2, the base station 1 receives a ranging signal X''(t) from the terminal 2. A correlation calculation unit 40 multiplies the ranging signal X''(t) by its complex conjugate, executes correlation calculation of its multiplication result, and extracts each frequency component of the multiplication result. A distance estimation unit 41 estimates propagation distance of a radio wave transmitted and received by the base station 1 and the terminal 2 from phases of frequency components extracted by the correlation calculation unit 40.SELECTED DRAWING: Figure 1
【課題】伝搬距離の推定精度を向上することができる伝搬距離推定装置を提供する。【解決手段】基地局１は、測距信号Ｘ(t)を端末２に送信し、端末２にこの測距信号Ｘ(t)を返信させる。基地局１及び端末２の間にクロック誤差がある場合、基地局１は、端末２から測距信号Ｘ’’(t)を受信する。相関演算部４０は、測距信号Ｘ’’(t)とその複素共役とを乗算し、その乗算結果に対し相関演算を行って、乗算結果の各周波数成分を抽出する。距離推定部４１は、相関演算部４０が抽出した周波数成分の位相から、基地局１及び端末２で送受信される電波の伝搬距離を推定する。【選択図】図１
PROBLEM TO BE SOLVED: To provide a propagation distance estimation device capable of improving estimation accuracy of propagation distance.SOLUTION: A base station 1 transmits a ranging signal X(t) to a terminal 2 and has the terminal 2 return the ranging signal X(t). If there is a clock error between the base station 1 and the terminal 2, the base station 1 receives a ranging signal X''(t) from the terminal 2. A correlation calculation unit 40 multiplies the ranging signal X''(t) by its complex conjugate, executes correlation calculation of its multiplication result, and extracts each frequency component of the multiplication result. A distance estimation unit 41 estimates propagation distance of a radio wave transmitted and received by the base station 1 and the terminal 2 from phases of frequency components extracted by the correlation calculation unit 40.SELECTED DRAWING: Figure 1
【課題】伝搬距離の推定精度を向上することができる伝搬距離推定装置を提供する。【解決手段】基地局１は、測距信号Ｘ(t)を端末２に送信し、端末２にこの測距信号Ｘ(t)を返信させる。基地局１及び端末２の間にクロック誤差がある場合、基地局１は、端末２から測距信号Ｘ’’(t)を受信する。相関演算部４０は、測距信号Ｘ’’(t)とその複素共役とを乗算し、その乗算結果に対し相関演算を行って、乗算結果の各周波数成分を抽出する。距離推定部４１は、相関演算部４０が抽出した周波数成分の位相から、基地局１及び端末２で送受信される電波の伝搬距離を推定する。【選択図】図１
PROPAGATION DISTANCE ESTIMATION DEVICE
伝搬距離推定装置
KOGA KENICHI (author)
2018-08-09
Patent
Electronic Resource
Japanese
IPC:
G01S
RADIO DIRECTION-FINDING
,
Funkpeilung
/
B60R
Fahrzeuge, Fahrzeugausstattung oder Fahrzeugteile, soweit nicht anderweitig vorgesehen
,
VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
/
E05B
LOCKS
,
Schlösser
/
H04W
WIRELESS COMMUNICATION NETWORKS
,
Drahtlose Kommunikationsnetze
ESTIMATION METHOD AND DEVICE OF GROUT INFILTRATION DISTANCE
| European Patent Office | 2020