Patent ID: 8731579

Claim:
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, wherein applying interference cancellation to aid in determining a PMI comprises: canceling one or more interfering signals to obtain a channel estimate and a residual covariance matrix for a channel between the serving node and the mobile device; calculating, as a function of the channel estimate and the residual covariance matrix, which of a plurality of precoders maximizes a signal-to-noise ratio (SNR) of a signal between the serving node and the mobile device, the SNR thereby being maximized in a lobe that points towards the mobile device.