Physical alignment for multiple input multiple output devices

A wireless communication device, comprising:

• one or more processors;
• and
• one or more memories coupled with the one or more processors and that store processor-executable code that, when executed by the one or more processors, is configured to cause the first device to:
• receive, at at least a first antenna of a first antenna array of the first wireless communication device from at least a second antenna of a second antenna array of a second wireless communication device, a first set of one or more reference signals, the first antenna array including a first set of antennas that includes a plurality of antennas including the first antenna;
• measure, in association with receiving the first set of reference signals, a first set of one or more phases for the first set of reference signals;
• estimate, in accordance with the measured first set of phases, a linear offset between the first antenna array and the second antenna array;
• adjust an alignment of the first antenna array in accordance with the estimated linear offset;
• receive, at the first set of antennas of the first antenna array from a second set of antennas of the second antenna array after adjusting the alignment of the first antenna array in accordance with the linear offset, a second set of reference signals that includes a plurality of reference signals;
• measure, in association with receiving the second set of reference signals, a second set of phases that includes a plurality of phases, each phase of the second set of phases being measured for a respective reference signal of the second set of reference signals;
• estimate, in accordance with the second set of phases and in accordance with adjusting the alignment of the first antenna array in accordance with the estimated linear offset, one or more rotational offsets between the first antenna array and the second antenna array;
• and
• adjust the alignment of the first antenna array in accordance with the estimated one or more rotational offsets.

A wireless communication device, comprising:

• means for receiving, at at least a first antenna of a first antenna array of the first wireless communication device from at least a second antenna of a second antenna array of a second wireless communication device, a first set of one or more reference signals, the first antenna array including a first set of antennas that includes a plurality of antennas including the first antenna;
• means for measuring, in association with receiving the first set of reference signals, a first set of one or more phases for the first set of reference signals;
• means for estimating, in accordance with the measured first set of phases, a linear offset between the first antenna array and the second antenna array;
• means for adjusting an alignment of the first antenna array in accordance with the estimated linear offset;
• means for receiving, at the first set of antennas of the first antenna array from a second set of antennas of the second antenna array after adjusting the alignment of the first antenna array in accordance with the linear offset, a second set of reference signals that includes a plurality of reference signals;
• means for measuring, in association with receiving the second set of reference signals, a second set of phases that includes a plurality of phases, each phase of the second set of phases being measured for a respective reference signal of the second set of reference signals;
• means for estimating, in accordance with the second set of phases and in accordance with adjusting the alignment of the first antenna array in accordance with the estimated linear offset, one or more rotational offsets between the first antenna array and the second antenna array;
• and
• means for adjusting the alignment of the first antenna array in accordance with the estimated one or more rotational offsets.

A non-transitory computer-readable medium storing code for wireless communication at a first wireless communication device, the code comprising instructions executable by one or more processors to:

• receive, at at least a first antenna of a first antenna array of the first wireless communication device from at least a second antenna of a second antenna array of a second wireless communication device, a first set of one or more reference signals, the first antenna array including a first set of antennas that includes a plurality of antennas including the first antenna;
• measure, in association with receiving the first set of reference signals, a first set of one or more phases for the first set of reference signals;
• estimate, in accordance with the measured first set of phases, a linear offset between the first antenna array and the second antenna array;
• adjust an alignment of the first antenna array in accordance with the estimated linear offset;
• receive, at the first set of antennas of the first antenna array from a second set of antennas of the second antenna array after adjusting the alignment of the first antenna array in accordance with the linear offset, a second set of reference signals that includes a plurality of reference signals;
• measure, in association with receiving the second set of reference signals, a second set of phases that includes a plurality of phases, each phase of the second set of phases being measured for a respective reference signal of the second set of reference signals;
• estimate, in accordance with the second set of phases and in accordance with adjusting the alignment of the first antenna array in accordance with the estimated linear offset, one or more rotational offsets between the first antenna array and the second antenna array;
• and
• adjust the alignment of the first antenna array in accordance with the estimated one or more rotational offsets.