×

Tomographic loss factor estimation

  • US 10,274,602 B2
  • Filed: 07/14/2015
  • Issued: 04/30/2019
  • Est. Priority Date: 07/14/2014
  • Status: Active Grant
First Claim
Patent Images

1. A method for determining a signal power loss relative to a receiver, the method comprising:

  • obtaining measured received power levels for each of a plurality of sounding signals from one or more sounding transmitters as measured at a stationary receiver located within a structure, wherein the one or more sounding transmitter is at a known location relative to the receiver upon transmission of a sounding signal and the plurality of sounding signals pass through at least a portion of the structure;

    determining a direction of incidence relative to the receiver based at least in part on the known location of the sounding transmitter relative to the receiver for each of the plurality of sounding signals received at the receiver;

    calculating a signal loss value for each of the plurality of sounding signals based at least in part on the measured receiver power level of each of the plurality of sounding signals and a corresponding known signal power level relative to the receiver in free space;

    generating a signal loss profile for the receiver based at least on the signal loss values and the corresponding direction of incidence of each of the plurality of sounding signals relative to the receiver; and

    extrapolating the signal loss values calculated for the plurality of sounding signals broadcast at a sounding frequency to determine a projected signal loss for a transmission frequency of a transmitter collocated with the receiver based on known loss relationships between the sounding frequency and the transmission frequency, wherein the transmitter utilizes a transmission frequency different than the sounding frequency of the plurality of sounding signals.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×