1. A method for state/space estimation, comprising: arranging a first pair of radio frequency sensors in a network of nodes arranged in a space; calibrating said first pair of radio frequency sensors to determine a first fading condition associated with said first pair of radio frequency sensors; measuring signal strength of at least one signal sent between said first pair of radio frequency sensors; determining a first likelihood model based on said first fading condition; and estimating a first posterior distribution based on said signal strength of said at least one signal using said first likelihood model for purposes of determining object information within said space.