Enhanced Angle-of-Arrival Positioning

A radio node of a wireless communication network,

• comprising one or more processing circuits operable to:
• estimate an angle-of-arrival (AoA) between a serving node of the wireless communication network and a mobile device served in a cell associated with the serving node based on a precoding matrix indicator (PMI) determined for the serving node in a downlink direction or for the mobile device in an uplink direction;
• and
• estimate the AoA between the mobile device and a non-serving neighbor node of the wireless communication network based on a PMI determined for the neighbor node in the downlink direction or for the mobile device in the uplink direction.

A method of estimating a position of a mobile device served in a cell of a serving node of a wireless communication network, the method comprising:

• applying interference cancellation to aid in determining a precoding matrix indicator (PMI) for the serving node in a downlink direction or for the mobile device in an uplink direction;
• estimating an angle-of-arrival (AoA) between the mobile device and the serving node based on the PMI determined with the aid of interference cancellation;
• and
• estimating the position of the mobile device based on the estimated AoA.

A radio node of a wireless communication network, comprising one or more processing circuits operable to:

• cancel one or more interfering signals received from other mobile devices to aid in determining a precoding matrix indicator (PMI) for a mobile device served in a cell associated with the serving node in an uplink direction;
• estimate an angle-of-arrival (AoA) between the mobile device and the serving node based on the PMI determined with the aid of interference cancellation;
• and
• estimate the position of the mobile device based on the estimated AoA.