Beamforming Antenna Array With Segmented Groups

Solution Overview

Problem

In multi-cellular communication systems, user equipment at cell edges experience deteriorated performance due to signal power reduction and interference from other cells, and increasing the number of transmission antennas to mitigate interference leads to power loss and beam width narrowing.

Innovation Solution

A method using multiple antennas divided into two groups, arrayed at specific distances and directions to form a primary linear array, with a precoding matrix that ensures signals have the same phase on the same plane, maintaining a constant beam width and preventing power loss due to angular spread.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Object-affected harmful factors

If the number of transmission antennas is increased to remove interference, then interference is reduced, but power loss is generated because beam width is narrowed

Engineering Contradiction:

ImproveinterferenceVSAvoidpower loss

Core Design Contradiction:

Object-affected harmful factorsVSLoss of energy

Solution Approach 1:

The transmission antennas are divided into two distinct antenna groups with specific spatial arrangements. The first antenna group is arrayed at a first distance in a first direction, while the second antenna group is arrayed at the same first distance in a second direction. This segmentation allows the system to maintain beam width while reducing interference through coordinated transmission from multiple antenna groups.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent introduces a two-dimensional antenna arrangement where antennas are positioned in both first and second directions at equal distances. This dimensional expansion allows the system to achieve beamforming in multiple directions simultaneously, maintaining beam width while reducing interference through spatial diversity.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

2Object-affected harmful factors

If the number of transmission antennas is increased to remove interference, then interference is reduced, but beam width is narrowed

Engineering Contradiction:

ImproveinterferenceVSAvoidbeam width

Core Design Contradiction:

Object-affected harmful factorsVSLength of moving object

Solution Approach 1:

The transmission antennas are divided into two distinct antenna groups with specific spatial arrangements. The first antenna group is arrayed at a first distance in a first direction, while the second antenna group is arrayed at the same first distance in a second direction. This segmentation allows the system to maintain beam width while reducing interference through coordinated transmission from multiple antenna groups.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent introduces a two-dimensional antenna arrangement where antennas are positioned in both first and second directions at equal distances. This dimensional expansion allows the system to achieve beamforming in multiple directions simultaneously, maintaining beam width while reducing interference through spatial diversity.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

Data Source

PatentUS8867655B2Apparatus and method for transmitting data using multiple antennas and beamforming

Publication Date: 2014.10.21 PANTECH CORP

AI summary

Provided are an apparatus and method for transmitting data using multiple antennas and beamforming. The apparatus of the present invention comprises: a modulation unit which performs constellation mapping on input bits to generate modulated symbols; a pre-coding unit which multiplies a pre-coding matrix and the modulated symbols to generate pre-coded symbols; and a plurality of transmitting antennas for transmitting the pre-coded symbols. According to the present invention, a beam width is maintained constant, regardless of a radiation angle, thus preventing a loss of power caused by an angular spread and preventing the generation of shadow zone at a large radiation angle.