METHOD FOR CALCULATING A CONFIDENCE ECHO SIGNAL THAT IS EXEMPT FROM MULTIPATH PROPAGATION EFFECTS AND FOR DETERMINING A DISTANCE AND/OR A DIRECTION TO AN ECHO SOURCE AND DEVICE AND VEHICLE

摘要

A kind of method of the present invention is for calculating confidence level echo-signal V phases(Δt ),I.e. from multipath transmisstion effect,The especially method of echo-signal confidence level under water,Described method includes following steps :-determine that the M of the measurement echo-signal changed over time is a(Δt ),It has superposition confidence level echo-signal V phases(Δt )With a multipath echo signal S t,Make the interference for especially measuring echo-signal in this way,It calculates in envelope U(Δt )Echo-signal M(Measurement),In the envelope U of calculating cycle T(Δt )And use the measurement echo-signal at the beginning between section,Including a*T time intervals,It is wherein the calculated period that confidence factor is less than or equal to 1 T,Make confidence level echo-signal V phases(Δt )From multipath transmisstion effect,Provide [a*T is arrived in t=0].