×

Method, system, and apparatus for wireless power transmission based on power waveforming

  • US 10,447,094 B2
  • Filed: 05/02/2017
  • Issued: 10/15/2019
  • Est. Priority Date: 05/03/2016
  • Status: Active Grant
First Claim
Patent Images

1. An apparatus for wireless power transmission, comprising:

  • at least one antenna configured for receiving at least one wireless signal from a receiver, via a multipath channel between the apparatus and the receiver; and

    at least one processor configured forestimating at least one channel state information (CSI) of the multipath channel based on the at least one wireless signal,determining a power transmission waveform based on the at least one CSI, andcalculating a power transfer signal based on the power transmission waveform and a reference signal,wherein the at least one antenna is further configured for wirelessly transmitting the power transfer signal to the receiver,wherein determining the power transmission waveform comprises jointly designing the power transmission waveform and the reference signal to maximize an efficiency gain that is a ratio between a total harvested energy at the receiver and a total energy expenditure at the apparatus,wherein jointly designing the power transmission waveform and the reference signal comprises;

    initiating an iteration number,optimizing, based on an initial version of the reference signal or a previous version of the reference signal from previous iteration, the power transmission waveform to maximize the efficiency gain and generate a current version of the power transmission waveform of current iteration,optimizing, based on the current version of the power transmission waveform of current iteration, the reference signal to maximize the efficiency gain and generate a current version of the reference signal of current iteration,increasing the iteration number by one, andrepeating the steps of optimizing the power transmission waveform, optimizing the reference signal and increasing the iteration number, until at least one of the following;

    the iteration number exceeds a first threshold, a difference between the current version of the reference signal of current iteration and the previous version of the reference signal from previous iteration is smaller than a second threshold, and a difference between the current version of the power transmission waveform of current iteration and a previous version of the power transmission waveform from previous iteration is smaller than a third threshold.

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