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Method, control system and communication system for adapting beam patterns

A beam pattern and control system technology, applied in the field of communication systems, can solve problems such as poor PA utilization and reduce aperture efficiency, and achieve the effect of improving performance

Active Publication Date: 2020-07-31
TELEFON AB LM ERICSSON (PUBL)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In general, however, the requirement for low sidelobe levels implies a penalty for reduced aperture efficiency
In downlink, poor PA utilization will be a problem in case of active array antenna implementation

Method used

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  • Method, control system and communication system for adapting beam patterns
  • Method, control system and communication system for adapting beam patterns
  • Method, control system and communication system for adapting beam patterns

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Embodiment Construction

[0044] For simplicity of description (and drawings), the following description will mainly focus on the case of one-dimensional (1D) antennas, but is not limited to 1D. as combined Figure 9-11b To illustrate, the disclosed ideas and methods are actually more beneficial for two-dimensional (2D) antennas.

[0045] The array antenna consists of multiple sub-arrays N tot , such as N tot is arranged as N within the aperture tot =M×N antenna sub-arrays (each sub-array includes one or more antenna elements); M and N are integers equal to or greater than 1, M, N≧1. The following description is for the M x N topology, but the principles apply to other antenna topologies as well.

[0046] This disclosure relates to "fixed multi-beam" systems and should be construed as a functional description in which transmission and / or reception is performed with one or more beams selected from a set of beams, each beam covering a portion (i.e. only part) of the service area . The beam is fixed...

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Abstract

The present disclosure relates to a method and a control system for adapting a beam pattern produced by at least one array antenna 21-23 serving one or more users UE1, UE2. Each array antenna includes a plurality of antenna sub-arrays 24 within an aperture and is configured to provide coverage to a service area using a fixed set of beams 41 each having a beam pattern covering a portion of the service area, the beam pattern is generated by applying weights to the antenna subarray. The method includes: generating 116 several weight sets for each fixed beam, wherein each weight set produces similar coverage in the main direction and produces sidelobe levels below one or more thresholds in other directions; beam store 118 said set of weights; receive 120 information about at least two fixed beams from a scheduler 34; 91, wherein a first fixed beam 25; 96 and a second fixed beam 26; UE1, UE2 provide coverage; select a set of weights for said first fixed beam 25; 96 based on sidelobe levels 95 in the main direction of said second fixed beam 94, and based on The sidelobe level 97 for said second fixed beam 26; 94 selects a set of weights to minimize the interference between said first fixed beam and said second fixed beam; and when generating the corresponding beam pattern, to The antenna subarray applies 122 the set of weights selected for each fixed beam.

Description

technical field [0001] The present disclosure relates to a method for adapting a beam pattern produced by an array antenna as defined in the preamble of independent claim 1 . The present disclosure also relates to a control system for adapting a beam pattern produced by an array antenna and a communication system comprising such a control system. Background technique [0002] Fixed multi-beam antenna systems are one of several possible implementations in telecommunication systems. The principle is to have a rather large fixed set of beams, where each beam covers a part of a node's service area, and all beams together cover the complete desired service area with two orthogonal polarizations. [0003] In such a system, downlink and uplink transmissions between UEs and nodes can be scheduled by utilizing the most suitable subset of beams, ie the beams that give the best link budget and have the best SIR. At the same time, other UEs can also be scheduled by using another beam ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B7/0452H04B7/06H04B7/08
CPCH04B7/0452H04B7/0695H04B7/088H04B7/0617
Inventor 拉尔斯·曼霍尔姆斯文·彼得森史蒂芬·约翰逊
Owner TELEFON AB LM ERICSSON (PUBL)