Focusing pulsed signal transmissions in multipath wireless power delivery environments
Techniques are described herein for enabling, among other features, more effective wireless charging of devices in wireless power delivery environments through enhanced signal focusing over multiple paths in a multipath wireless power delivery environment. More specifically, the systems and methods discussed herein describe techniques for increasing effective charging of devices, including enhanced ability to focus charging utilizing multiple pathways, phase detection of incoming signals allowing for movement detection in a wireless environment, phase synchronization, and directional arrays.
1. A method of focusing pulsed signal transmissions in a multipath wireless power delivery environment, the method comprising:
transmitting, from a single transmitting antenna, a pulsed training signal over a plurality of paths to a receiving antenna in the multipath wireless power delivery environment,
wherein the pulsed training signal includes at least one signal pulse;
identifying timing and phase information corresponding to the pulsed training signal as received by the receiving antenna over each of the plurality of paths;
configuring transmission settings associated with the transmitting antenna based on the timing and phase information,
wherein the transmission settings inverse the timing information to focus a pulsed wireless power transmission signal over multiple paths of the plurality of paths for simultaneous reception by the receiving antenna over two or more of the multiple paths, and
wherein the pulsed wireless power transmission signal comprises a signal pulse transmitted over each of the multiple paths at a different time and a different phase such that the signal pulses constructively interfere at the receiving antenna; and
transmitting, by the single transmitting antenna, the pulsed wireless power transmission signal to the receiving antenna over the multiple paths.
2. The method of claim 1 , wherein the transmission settings adjust the phase information for in phase or normalized reception of the pulsed wireless power transmission signal by the receiving antenna over the two or more of the multiple paths.
3. The method of claim 2 , wherein the pulsed wireless power transmission signal transmitted over the two or more of the plurality of paths constructively interfere to generate a higher energy ‘pulse’.
4. The method of claim 1 , wherein the timing and phase information comprising received signals from a training transmission including time of signal arrival, signal amplitude, and signal phase.
5. The method of claim 4 , wherein the signals received with an amplitude below a threshold are omitted from the timing and phase information.
6. The method of claim 1 , further comprising:
retransmitting the pulsed training signal over a second plurality of paths to the receiving antenna after a triggering event;
identifying second timing and phase information corresponding to the pulsed training signal as received by the receiving antenna over each of the second plurality of paths; and
reconfiguring the transmission settings associated with the transmitting antenna based on the second timing and phase information.
7. The method of claim 6 , wherein the pulsed wireless power transmission signal is transmitted for a predetermined amount of time, and wherein the triggering event comprises an expiry of the predetermined amount of time.
8. The method of claim 7 , further comprising:
receiving feedback regarding power received at the receiving antenna from the pulsed wireless power transmission signal; and
comparing the feedback to expected power gains,
wherein the triggering event comprises the feedback differing from the expected power gains.
9. The method of claim 1 , wherein the timing and phase information is received from a wireless power receiver client.
10. An apparatus comprising:
one or more computer readable storage media; and
program instructions stored on the one or more computer readable storage media, wherein the program instruction, when executed by a processing system, direct the processing system to:
direct a single transmitting antenna to transmit a pulsed training signal over a plurality of paths to a receiving antenna in the multipath wireless power delivery environment,
wherein the pulsed training signal includes at least one signal pulse;
identify timing and phase information corresponding to the pulsed training signal as received by the receiving antenna over each of the plurality of paths;
configure transmission settings associated with the transmitting antenna based on the timing and phase information,
wherein the transmission settings inverse the timing information to focus a pulsed wireless power transmission signal over multiple paths of the plurality of paths for simultaneous reception by the receiving antenna over two or more of the multiple paths, and
wherein the pulsed wireless power transmission signal comprises a signal pulse transmitted over each of the multiple paths at a different time and a different phase such that the signal pulses constructively interfere at the receiving antenna; and
direct the single transmitting antenna to transmit the pulsed wireless power transmission signal to the receiving antenna over the multiple paths.
11. The apparatus of claim 10 , wherein the transmission settings adjust the phase information for in phase or normalized reception of the pulsed wireless power transmission signal by the receiving antenna over the two or more of the multiple paths.
12. The apparatus of claim 11 , wherein the pulsed wireless power transmission signal transmitted over the two or more of the plurality of paths constructively interfere to form an increase in pulse amplitude from the addition of signals.
13. The apparatus of claim 10 , wherein the timing and phase information comprising received signals from thea training transmission including time of signal arrival, signal amplitude, and signal phase.
14. The apparatus of claim 13 , wherein the signals received with an amplitude below a threshold are omitted from the timing and phase information.
15. The apparatus of claim 10 , wherein the program instruction, when executed by the processing system, further direct the processing system to:
receive feedback regarding power received at the receiving antenna from the pulsed wireless power transmission signal;
compare the feedback to expected power gains;
trigger a recalibration event when the feedback differs from the expected power gains.
16. The apparatus of claim 10 , wherein the timing and phase information is received from a wireless power receiver client.
17. A wireless power transmission system, comprising:
an adaptively-phased antenna array having multiple radio frequency (RF) transceivers;
control circuitry configured to:
direct a single transmitting antenna of the adaptively-phased antenna array to transmit a pulsed training signal over a plurality of paths to a receiving antenna in the multipath wireless power delivery environment,
wherein the pulsed training signal includes at least one signal pulse;
identify timing and phase information corresponding to the pulsed training signal as received by the receiving antenna over each of the plurality of paths;
configure transmission settings associated with the transmitting antenna based on the timing and phase information,
wherein the transmission settings inverse the timing information to focus a pulsed wireless power transmission signal over multiple paths of the plurality of paths for simultaneous reception by the receiving antenna over two or more of the multiple paths, and
wherein the pulsed wireless power transmission signal comprises a signal pulse transmitted over each of the multiple paths at a different time and a different phase such that the signal pulses constructively interfere at the receiving antenna; and
direct the single transmitting antenna to transmit the pulsed wireless power transmission signal to the receiving antenna over the multiple paths.