Patent ID: 8089827
Filing Date: 2012-01-03
Classification: G01S

Abstract:
1. A method for localization of M remote devices ( 3 ′, 3 ″, . . . 3 M ) by their coordinates within an N-dimensional system, through a) the emission of acoustical pulses and b) the emission of radiofrequency pulse from each remote device ( 3 ′, 3 ″, . . . 3 M ), at the time of detection of said acoustical wave front by its on-board microphone, and c) the acquisition from a radio base ( 2 ) unit, of the radiofrequency signals and time delays which are proportional to the distance (d ij ) between the i-th acoustical source ( 4 ) and the remote j-th device ( 3 ); comprising: d—for each emission from the i-th source, successive insertion of components in a reception vector (D i—in the absence of disturbances, having a maximum length M corresponding to the number of remote devices; ii—in presence of disturbances of an acoustical or electromagnetic kind, that could erroneously be interpreted as additional reception signals, being “oversized” according to the noise/disturbances, the number of evaluations being increased up to L e—repetition of the steps a, b, c, d for all N+1 acoustical sources, in order to form N+1 reception vectors; f—the calculation of the position X