Patent ID: 9664769
Date: 2017-05-30
CPC Classifications: G01S

Claim:
1. A method comprising: receiving signals from at least one transmitter in a receiver, wherein the location of the at least one transmitter is known and wherein the signals include electromagnetic waves propagating through space; recording corresponding observations associated with the received signals, wherein the observations include power levels of the corresponding signal; recording locations, of the receiver, associated with the observations; receiving two-dimensional geometric data or three-dimensional geometric data describing objects in an environment, wherein the environment includes the locations of the receiver associated with the observations; determining expected observations of the signals, based on the two-dimensional geometric data or three-dimensional geometric data, corresponding to the recorded observations and locations; comparing the expected observations with the recorded observations; and estimating characteristics of the objects in the environment based on the comparing of the expected observations with the recorded observations, wherein the estimated characteristics of the objects include three-dimensional geometric data describing the objects in the environment.