Patent ID: 9217788
Filing Date: 2015-12-22
Classification: G01S

Abstract:
1. A location and tracking system comprising wireless base stations, an input interface, and a processor, wherein the processor is configured to: (a) receive via the input interface initial physical environment inputs for an environment, said inputs including data representing geometry lines in plan and default signal attenuation values for said lines, and to provide, according to said inputs, a physical environment model with wall segment parameters, wherein said inputs include: (b) generate a channel parameters fingerprint of projected signal strengths in the environment according to the initial physical environment model; (c) at time intervals: (d) modify said wall segment parameters of the physical environment model according to said fitness function of the h  where: (e) update the channel parameters fingerprint according to the modification of the environment model in step (d); (f) perform location error estimation which is based on the fingerprint updated in step (e) and gathered channel parameters and the h (g) rank the h (h) repeat steps (c3) to (g) in subsequent iterations for each of H hypotheses; and (i) select a most likely hypothesis for the mobile node trajectory and terminate the other hypotheses.