Reduced gain of an antenna beam pattern

Abstract

The present disclosure relates to a wireless communication node (1) comprising at least one antenna arrangement (2, 2', 2"). Each antenna arrangement (2, 2', 2") comprises at least one antenna port (3), at least two antenna elements (4a, 4b, 5a, 5b, 6a, 6b, 7a, 7b) arranged for providing an antenna beam pattern (8), and a phase control arrangement (9, 9', 9") arranged to receive at least one input signal (10) via said antenna port (3) and to determine a plurality of intermediate signal components (11) from said input signal (10) by determining a first set of respective phase shifts (Phi 1, Phi 2, 10 Phi 3, Phi 4; Theta 1, Theta 2, Theta 3, Theta 4, Theta 5, Theta 6, Theta 7, Theta 8) for said input signal (3). The phase control arrangement (9) is further arranged to determine a final signal component (12) for each antenna element (4a, 4b, 5a, 5b, 6a, 6b, 7a, 7b) from said intermediate signal components (12) by determining a second set of respective phase shifts (beta 1, beta 2, beta 3, beta 4; Phi 1, Phi 2, Phi 3, Phi 4, Phi 5, Phi 6, Phi 7, Phi 8) for said intermediate signal components (12), wherein the second set of phase shifts (beta 1, beta 2, beta 3, beta 4; Phi 1, Phi 2, Phi 3, Phi 4, Phi 5, Phi 6, Phi 7, Phi 8) is arranged to provide a lowered gain of the antenna arrangement (2, 2', 2") in at least one direction (D). The present disclosure also relates to a corresponding method.

Description

technical field [0001] The present disclosure relates to wireless communication systems, and in particular, to controlling an antenna beam pattern of an antenna arrangement having at least two antenna elements. Background technique [0002] Future cellular networks are expected to be able to deliver high data rates up to several gigabytes per second while being energy efficient. One possible way to achieve such high data rates and / or reduce energy consumption in cellular networks is to deploy a reconfigurable antenna system (RAS) or multiple reconfigurable antenna systems. RAS is an antenna system whose radiation characteristics can be changed by the network after deployment and adapted eg to current traffic requirements. [0003] The most common antenna parameter that can be controlled remotely is antenna tilt. More possibilities for modifying the shape of the antenna lobe besides one-dimensional tilt will be introduced, which will open up new possibilities for improving ...

AI Technical Summary

Problems solved by technology

Tilting the antenna towards the horizon in urban scenarios can lead to degraded network performance e.g. due to high interference to other cells

[0006] However, many algorithms for tuning reconfigurable antennas (such as some SON algorithms) do not consider any orientation as an undesired option

This can lead to unnecessarily slow adaptation and temporarily poor performance during adaptation as these sub-optimal antenna settings are made by automatic algorithms

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