Patent ID: 9568594
Date: 2017-02-14
CPC Classifications: G01S,G08B,H04B

Claim:
1. A method comprising: transmitting, via at least one transmitting antenna, ultra-wide band (UWB) radio frequency (RF) signals at an environment including at least one human, and receiving, via at least one receiving antenna, echo signals from the environment, processing the received echo signals to derive a spatial distribution of echo sources in the environment using spatial parameters of the at least one transmitting and/or receiving antennas, and estimating a posture of the at least one human by analyzing the spatial distribution with respect to echo intensity, wherein the posture estimation comprises analyzing the spatial distribution using curve characteristics of at least one projection of an intensity of the received echo signals onto at least one respective axis, wherein the spatial distribution is defined using voxels and wherein the posture is estimated using high-power voxels as defined by a specified power threshold, and wherein the posture estimation further comprises characterizing postures of the at least one human with respect to at least a horizontal and a vertical axes.