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1. (WO2018037712) DISTANCE ESTIMATING SYSTEM

Pub. No.:    WO/2018/037712    International Application No.:    PCT/JP2017/023904
Publication Date: Fri Mar 02 00:59:59 CET 2018 International Filing Date: Fri Jun 30 01:59:59 CEST 2017
IPC: G01S 13/76
G01S 15/74
H04B 1/7183
Applicants: DENSO CORPORATION
株式会社デンソー
Inventors: OKADA Noriaki
岡田 則昭
Title: DISTANCE ESTIMATING SYSTEM
Abstract:
Provided is a distance estimating system that comprises a first terminal (1) and a second terminal (2) that perform wireless communication. The first terminal transmits a response request signal, and successively transmits impulse signals as synchronization signals. The second terminal receives the response request signal, demodulates the received response request signal, shifts each bit of generated response data by one toward the rear side each time a synchronization signal synchronizing from the leading bit to the trailing bit is received, transmits an impulse signal in the case where the value of a bit that is a transmission target at the time when the synchronization signal was received is a prescribed value that is predetermined as a value indicating that the impulse signal should be transmitted, and does not transmit the impulse signal in the case where the value of the bit is not the prescribed value. The first terminal additionally measures a roundtrip time, specifies a flight time of an impulse signal, and estimates the distance to the second terminal.