Antenna Amplitude Taper Selection to Reduce Atmospheric Interference

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Solution Overview

Problem

Meteorological events and geographic features cause unintended signal reflection and refraction, leading to interference at unintended cells, resulting in service degradation and call drops.

Innovation Solution

Selecting an optimal antenna amplitude taper to minimize interference by determining and comparing interference levels using different tapers, choosing the taper that causes less interference.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Area of stationary object

If a base station transmits signals using conventional amplitude tapering, then the coverage area is maintained, but interference occurs at victim cells due to atmospheric conditions like tropospheric ducting

Engineering Contradiction:

Improvecoverage areaVSAvoidinterference at victim cell

Core Design Contradiction:

Area of stationary objectVSObject-affected harmful factors

Solution Approach 1:

The system dynamically switches between different amplitude taper configurations based on detected atmospheric conditions. The beam controller monitors signal characteristics and adjusts the amplitude taper in real-time, transitioning from static conventional tapering to adaptive dynamic tapering that responds to changing atmospheric propagation conditions, thereby reducing interference while maintaining coverage.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The invention changes the amplitude distribution parameters across antenna elements to mitigate interference. By adjusting the amplitude weights assigned to different antenna elements in the array, the system modifies the radiation pattern parameters to reduce side lobe levels that cause interference at victim cells, while maintaining the main beam coverage area.

Inventive Principle:

Principle #35Parameter changes

2Reliability

If the base station increases transmission power to maintain service quality, then coverage is improved, but interference at unintended cells increases due to signal reflection and refraction

Engineering Contradiction:

Improveservice qualityVSAvoidunintended signal transmission

Core Design Contradiction:

ReliabilityVSObject-generated harmful factors

Solution Approach 1:

The system applies different amplitude weights to different local regions (antenna elements) of the antenna array. By selectively adjusting the amplitude contribution of individual antenna elements or groups of elements, the system creates a non-uniform amplitude distribution that suppresses radiation in specific directions where interference problems occur, while maintaining adequate coverage in service areas.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The system converts the harmful effect of atmospheric conditions (tropospheric ducting, signal reflection) into a detectable indicator that triggers adaptive amplitude taper adjustment. By monitoring the effects of these atmospheric conditions on signal propagation, the system uses this information to optimize amplitude weighting, turning the previously harmful unpredictable propagation into a basis for adaptive interference mitigation.

Inventive Principle:

Principle #22Blessing in disguise (Convert harm into benefit)

3Device complexity

If conventional amplitude tapering is used, then device complexity is low, but the system cannot adapt to changing atmospheric conditions

Engineering Contradiction:

Improveamplitude taper selection systemVSAvoidresponse to atmospheric conditions

Core Design Contradiction:

Device complexityVSAdaptability or versatility

Solution Approach 1:

The system implements a feedback mechanism where the beam controller continuously monitors signal characteristics and atmospheric conditions, then adjusts the amplitude taper configuration accordingly. The feedback loop compares expected signal behavior with actual measurements and dynamically reconfigures the amplitude weights to optimize performance under changing atmospheric conditions while maintaining manageable system complexity.

Inventive Principle:

Principle #23Feedback

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

Reduces interference and maintains service quality by mitigating unwanted signal transmission during atmospheric conditions.

Implementation Method 1

a set of antenna elements at a base station transmit the wireless signals to the coverage area

Methodology Applied

Scientific EffectElectromagnetic radiation: Electromagnetic Induction

Implementation Method 2

Meteorological events such as a tropospheric duct, or geographic features such as bodies of water, often affect the propagation of signals by reflecting or refracting them in unintended directions

Methodology Applied

Scientific EffectRefraction: Refraction

Implementation Method 3

Meteorological events such as a tropospheric duct, or geographic features such as bodies of water, often affect the propagation of signals by reflecting or refracting them in unintended directions

Methodology Applied

Scientific EffectReflection: Reflection

Data Source

PatentUS20250219800A1Reduction of interference due to an atmospheric condition

Publication Date: 2025.07.03 T MOBILE INNOVATIONS LLC

AI summary

Systems and methods are provided for selecting an antenna amplitude taper to transmit wireless signals to a coverage area from a base station. A first interference level at a victim cell is determined when using a first amplitude taper. A second interference level at a victim cell is determined when using a second amplitude taper. Based on determining that the second interference level is less than the first interference level, the second amplitude taper is selected to transmit the wireless signals to the coverage area form the set of antenna elements at the base station.