Patent ID: 8207886
Filing Date: 2012-06-26
Classification: G01S

Abstract:
1. A method for determining wall positions for a building, comprising: (i) providing an array comprising an ultrawideband (UWB) transmitter and a plurality of UWB receivers; (ii) transmitting an UWB signal from said UWB transmitter into a building from a first array location to produce a first set of reflected signals; (iii) receiving said first set of reflected signals into said receivers, wherein each receiver of said plurality of receivers produces an output signal; (iv) stacking said output signal to produce a stacked signal; (v) reducing said stacked signal to a single quasi-one-dimensional (Q1D) signal equivalent to a plane wave propagating perpendicular to said array; (vi) analyzing said single Q1D signal in successive time windows to identify candidate wall locations; (vii) peeling a single Q1D signal at a candidate wall location of said candidate wall locations to produce stripped data; (viii) minimizing the mean-square error between a predicted signal and said stripped data for a first time window of said successive time windows to produce a first minimized layer signal; (ix) repeating step viii for subsequent time windows to produce a first minimized Q1D signal; and x repeating steps i-ix at a plurality of additional array locations.