Method For Estimating a Channel, and Network Node

摘要

The disclosure relates to a method (60) performed in a network node (2) for estimating a channel. The network node (2) controls an antenna array (3) comprising a number N of antennas (51, . . . , 5N) in one or more spatial dimensions. The network node (2) comprises a receiver (72) receiving signals from the antenna array (3). The method (60) comprises: obtaining (61) matched filter channel estimates for each sub-carrier and antenna of a signal received by the antennas (51, . . . , 5N), the signal comprising a number K of frequency sub-carriers; arranging (62) the obtained matched filter channel estimates in a first multi-dimensional array, wherein time or frequency domain samples of the matched filter channel estimates are arranged along a first dimension and wherein a second dimension is a first spatial dimension of the number N of antennas, wherein the matched filter channel estimates are ordered in the first multi-dimensional array such as to reflect the physical location in space of the antennas (51, . . . , 5N); applying (63) an orthogonal transform to the first multi-dimensional array, providing a second multi-dimensional array; de-noising (64) the second multi-dimensional array, providing a third multi-dimensional array; applying (65) the inverse of the orthogonal transform to the third multi-dimensional array, providing channel estimates for all branches of the receiver (72). The disclosure also relates to corresponding network node, computer program and computer program products.

主权项

1. A method performed in a network node for estimating a channel, the network node controlling an antenna array comprising a number N of antennas in one or more spatial dimensions, the network node comprising a receiver receiving signals from the antenna array, the method comprising:
obtaining matched filter channel estimates for each sub-carrier and antenna of a signal received by the antennas, the signal comprising a number K of frequency sub-carriers, arranging the obtained matched filter channel estimates in a first multi-dimensional array, wherein time or frequency domain samples of the matched filter channel estimates are arranged along a first dimension and wherein a second dimension is a first spatial dimension of the number N of antennas, wherein the matched filter channel estimates are ordered in the first multi-dimensional array such as to reflect the physical location in space of the antennas, applying an orthogonal transform to the first multi-dimensional array, providing a second multi-dimensional array, de-noising the second multi-dimensional array, providing a third multi-dimensional array, and applying the inverse of the orthogonal transform to the third multi-dimensional array, providing channel estimates for all branches of the receiver.