Technique for obtaining the rotation of a wireless device

A method for wireless communications, comprising:

• obtaining, by a first apparatus, via at least one receive antenna, first and second training signals transmitted from a second apparatus via at least first and second transmit antennas having different polarizations;
• determining, based on the first and second training signals, one or more characteristics for different transmit-receive antenna pairs, each pair comprising one of the first and second transmit antennas and the at least one receive antenna;
• generating, based on the one or more characteristics, a parameter indicative of a rotation of the first apparatus relative to the second apparatus;
• and
• adjusting the parameter based on the one or more characteristics.

An apparatus for wireless communications, comprising:

• means for obtaining, by a first apparatus, via at least one receive antenna, first and second training signals transmitted from a second apparatus via at least first and second transmit antennas having different polarizations;
• means for determining, based on the first and second training signals, one or more characteristics for different transmit-receive antenna pairs, each pair comprising one of the first or second transmit antennas and the at least one receive antenna;
• means for generating, based on the one or more characteristics, a parameter indicative of a rotation of the first apparatus relative to the second apparatus;
• and
• means for adjusting the parameter based on the one or more characteristics.

A non-transitory computer readable storage medium having instructions stored thereon for:

• obtaining, by a first apparatus, via at least one receive antenna, first and second training signals transmitted from a second apparatus via at least first and second transmit antennas having different polarizations;
• determining, based on the first and second training signals, one or more characteristics for different transmit-receive antenna pairs, each pair comprising one of the first and second transmit antennas and the at least one receive antenna;
• generating, based on the one or more characteristics, a parameter indicative of a rotation of the first apparatus relative to the second apparatus;
• and
• adjusting the parameter based on the one or more characteristics.

A wireless station, comprising:

• a receiver for receiving first and second training signals transmitted from a second apparatus via at least first and second transmit antennas having different polarizations;
• and
• a processing system configured to:
• determine, based on the first and second training signals, one or more characteristics for different transmit-receive antenna pairs, each pair comprising one of the first and second transmit antennas and the at least one receive antenna,
• generate, based on the one or more characteristics, a parameter indicative of a rotation of the first apparatus relative to the second apparatus, and
• adjust the parameter based on the one or more characteristics.