Dynamic antenna selection in millimeter wave systems

Patent metadata

Field	Value
Publication number	US-11770172-B2
Application number	US-201916365289-A
Country	US
Kind code	B2
Filing date	Mar 26, 2019
Priority date	May 10, 2018
Publication date	Sep 26, 2023
Grant date	Sep 26, 2023

Abstract

Methods, systems, and devices for wireless communications in millimeter wave (mmW) systems are described. A mmW wireless device may identify a plurality of subsets of antennas from available antennas. The wireless device may compare effective array gain values for each subset in the plurality of subsets of antennas. An effective array gain value may be determined based on a realized array gain for each subset normalized or penalized by a radio frequency (RF) power consumption for antennas corresponding to each subset in the plurality of subsets of antennas. Based on the comparison, the wireless device may select one or more subsets of the plurality of subsets of antennas, the selected one or more subsets may correspond to antenna combinations of one or more antenna subarray units. The mmW wireless device may then communicate using the selected one or more subsets.

First claim

What is claimed is:

1. A method for wireless communication at a first millimeter wave (mmW) device, comprising:
identifying a plurality of subsets of antennas from available antennas of the first mmW device;
comparing effective array gain values for each subset in the plurality of subsets of antennas, the effective array gain values based at least in part on a realized array gain normalized or penalized by a radio frequency (RF) power consumption by the first mmW device for each subset in the plurality of subsets of antennas;
selecting one or more subsets of the plurality of subsets of antennas based at least in part on the comparison, the selected one or more subsets associated with an effective array gain value that is subject to the RF power consumption; and
communicating with a second mmW device using the selected one or more subsets of the plurality of subsets of antennas.

2. The method of claim 1 , wherein communicating using the one or more subsets further comprises:
using a first antenna combination of the selected one or more subsets during a transmission time interval (TTI).

3. The method of claim 2 , wherein the first antenna combination comprises a plurality of antennas from antennas of the selected one or more subsets.

4. The method of claim 2 , wherein the using the antenna combination during the TTI comprises using the first antenna combination in a first sub-TTI and further comprises using a second antenna combination of the selected one or more subsets during a second sub-TTI, the TTI spanning one or more symbol periods.

5. The method of claim 1 , wherein comparing the effective array gain values for each subset in the plurality of subsets of antennas further comprises:
determining an effective array gain value for each subset in the plurality of subsets of antennas.

6. The method of claim 5 , wherein the determined effective array gain value for each subset in the plurality of subsets of antennas is based at least in part on a calculated realized array gain with the second mmW device normalized or penalized by radio frequency (RF) power consumption corresponding to antennas for each subset in the plurality of subsets of antennas.

7. The method of claim 5 , wherein the determined effective array gain values for each subset in the plurality of subsets of antennas are associated with an energy efficiency determination.

8. The method of claim 1 , wherein selecting the one or more subsets further comprises:
determining phase shift and amplitude control combinations corresponding to antennas of each subset in the selected one or more subsets.

9. The method of claim 8 , wherein the phase shift and amplitude control combinations corresponding to available antennas of each subset in the selected one or more subsets reconstruct one or more channels for communication at the first mmW device.

10. The method of claim 9 , wherein:
reconstruction of the one or more channels is aided by unitary beam training codebooks, quasi-unitary beam training codebooks, or a combination thereof.

11. The method of claim 1 , further comprising:
selecting a first subset of antennas from the plurality of subsets of antennas;
determining phase shift and amplitude control combinations corresponding to available antennas of the first subset of antennas;
selecting a second subset of antennas from the plurality of subsets of antennas;
determining phase shift and amplitude control combinations corresponding to available antennas of the second subset of antennas; and
determining the effective array gain values for the first subset of antennas and the second subset of antennas.

12. The method of claim 11 , wherein:
determining the phase shift and amplitude control combinations corresponding to available antennas of the first subset of antennas and available antennas of the second subset of antennas is based at least in part on a beam training procedure.

13. The method of claim 12 , wherein the beam training procedure comprises training beams corresponding to available antennas of the first subset of antennas and available antennas of the second subset of antennas.

14. The method of claim 1 , further comprising:
selecting a plurality of subsets of antennas from the available antennas of the first mmW device, the selecting based at least in part on an expected effective array gain of the subsets of antennas; and
determining the phase shift and amplitude control combinations corresponding to available antennas of each subset in the selected one or more subsets.

15. The method of claim 14 , wherein determining the phase shift and amplitude control combinations corresponding to available antennas of each subset in the selected one or more subsets further comprises:
performing a beam training procedure for each subset in the selected one or more subsets, wherein the beam training comprises training beams corresponding to available antennas of each subset in the selected one or more subsets.

16. The method of claim 15 , wherein performing the beam training on the selected one or more subsets further comprises:
evaluating beam width considerations of the training beams.

17. The method of claim 1 , wherein:
selecting the one or more subsets of the plurality of subsets of antennas is based at least in part on an expected effective array gain of the subsets of antennas.

18. The method of claim 1 , wherein the available antennas of the first mmW device comprise antennas arranged in one or more planar arrays or linear arrays.

19. The method of claim 1 , wherein the selected one or more subsets correspond to a non-uniform, non-linear antenna array.

20. An apparatus for wireless communication at a first millimeter wave (mmW) device, comprising:
a processor,
memory in electronic communication with the processor; and
instructions stored in the memory and executable by the processor to cause the apparatus to:
identify a plurality of subsets of antennas from available antennas of the first mmW device;
compare effective array gain values for each subset in the plurality of subsets of antennas, the effective array gain values based at least in part on a realized array gain normalized or penalized by a radio frequency (RF) power consumption by the first mmW device for each subset in the plurality of subsets of antennas;
select one or more subsets of the plurality of subsets of antennas based at least in part on the comparison, the selected one or more subsets corresponding to an effective array gain value that is subject to the RF power consumption; and
communicate with a second mmW device using the selected one or more subsets of the plurality of subsets of antennas.

21. The apparatus of claim 20 , wherein the instructions to communicate using the one or more subsets further are executable by the processor to cause the apparatus to:
use a first antenna combination of the selected one or more subsets during a transmission time interval (TTI).

22. The apparatus of claim 21 , wherein the first antenna combination comprises a plurality of antennas from antennas of the selected one or more subsets.

23. The apparatus of claim 21 , wherein the TTI comprises the first antenna combination in a first sub-TTI and further comprises a second antenna combination of the selected one or more subsets during a second sub-TTI, the TTI spanning one or more symbol periods.

24. The apparatus of claim 20 , wherein the instructions to compare the effective array

Assignees

• Qualcomm Inc

Inventors

• Raghavan Vasanthan
• Ryu Jung Ho
• Li Junyi

Classifications

• H04B7/0404

  the mobile station comprising multiple antennas, e.g. to provide uplink diversity · CPC title

• H04B7/0691 Primary

  using subgroups of transmit antennas · CPC title

• H04B7/0695 Primary

  using beam selection · CPC title

• H04B7/0408

  using two or more beams, i.e. beam diversity · CPC title

• H04B7/0456

  Selection of precoding matrices or codebooks, e.g. using matrices antenna weighting · CPC title