Patent ID: 11929792
Assignee: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H | IPC H

Claim 2:
3. The method of claim 2 further comprising:
estimating a wireless channel between the energy transmitter and the particular energy harvester for the frequency fmod(x+1,2) based on the radio frequency signal (SR(i=x)) received on the frequency fmod(x+1,2) during the particular time period (TPi=x) to provide a channel estimate for the frequency fmod(x+1,2);
wherein, for a second particular time period (TPi=x+1), for each time slot (TSi,j) of the one or more time slots ({TSi,j}j=0,1, . . . , J-1) for the second particular time period (TPi=x+1):
the method further comprises generating, using the channel estimate for the frequency fmod(x+1,2), a beamformed radio frequency signal that is modulated with the signature of the particular energy harvester; and
transmitting, during the time slot (TSi,j) of the time period (TPi) on the frequency fmod(i,2), the radio frequency signal (ST(i,j)) that is modulated with the signature of the particular energy harvester comprises transmitting, during the time slot (TSi,j) of the second particular time period (TPi=x+1) on the frequency fmod(x+1,2), the beamformed radio frequency signal that is modulated with the signature of the particular energy harvester as a radio frequency signal (ST(i=x+1)).