×

RF Fingerprinting for Location Estimation

  • US 20120178472A1
  • Filed: 03/21/2012
  • Published: 07/12/2012
  • Est. Priority Date: 06/08/2009
  • Status: Active Grant
First Claim
Patent Images

1. Measurement apparatus for compiling survey data for use in the estimation of a location of a terminal within a coverage area of a wireless network, the wireless network comprising at least one fixed node, the measurement apparatus comprising:

  • at least one processor; and

    at least one memory coupled to the processor, the at least one memory storing instructions executable by the at least one processor;

    to measure a complex frequency response of a radio channel between the apparatus and the at least one fixed node with the apparatus located at each of a plurality of different locations within the network;

    to derive data representing an autocorrelation function of each measured complex frequency response associated with each of the plurality of locations; and

    to store the derived data for each of the plurality of different locations in the at least one memory together with an indication of the location to which the autocorrelation function relates.

View all claims
  • 11 Assignments
Timeline View
Assignment View
    ×
    ×