Beam Former Radiation Pattern Control for Wireless Interference

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Solution Overview

Problem

Existing wireless networks face interference issues when multiple wireless links operate in the same spatial location and spectral band, leading to reduced communication bandwidth and data transmission rates.

Innovation Solution

A system with a spectrum allocation database controller that allocates spectral bands to wireless links based on their spatial location and active reception bands, using antenna arrays and beam formers to modify radiation patterns and reduce interference, allowing multiple wireless links to operate without interference while maximizing bandwidth.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If multiple wireless links operate in the same spatial location and spectral band, then communication bandwidth and data transmission rates increase, but interference between links increases

Engineering Contradiction:

Improvedata transmission rateVSAvoidinterference

Core Design Contradiction:

ProductivityVSObject-affected harmful factors

Solution Approach 1:

The system segments the spectral band into multiple sub-bands and allocates different sub-bands to different wireless links based on spatial location. This segmentation allows multiple links to operate simultaneously without interference by dividing the frequency resource space.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The system applies local quality by assigning different radiation patterns and beamforming characteristics to different spatial locations. Each wireless link is configured with specific beam weights that optimize its radiation pattern for its particular spatial position, reducing interference to other links while maximizing local transmission quality.

Inventive Principle:

Principle #3Local quality

2Object-affected harmful factors

If antenna arrays and beam formers are used to modify radiation patterns, then interference is reduced, but device complexity increases

Engineering Contradiction:

ImproveinterferenceVSAvoiddevice complexity

Core Design Contradiction:

Object-affected harmful factorsVSDevice complexity

Solution Approach 1:

The system performs preliminary action by pre-calculating and storing optimal beam weights for different spatial locations and spectral bands. The beam former uses these pre-computed weights to quickly adjust radiation patterns without requiring complex real-time calculations, thereby reducing device complexity while maintaining interference reduction effectiveness.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The system implements feedback mechanisms where received sounding packets are analyzed to determine optimal beam weights, which are then fed back to the beam former. This feedback loop allows the system to adapt to changing conditions while using relatively simple computational algorithms, balancing interference reduction with device 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

Enables multiple wireless links to operate simultaneously in the same spatial area without interference, improving data transmission rates by reallocating transmission bands and reducing interference from broadcast signals.

Implementation Method 1

a beam former that modifies a radiation pattern of the antenna array based on beam weights

Methodology Applied

Scientific EffectBeam forming:

Implementation Method 2

a channel estimator that generates a sounding packet; sends copies of the sounding packet using the beam former and the antenna array to the second wireless device

Methodology Applied

Scientific EffectSignal propagation:

Implementation Method 3

a beam former that modifies a radiation pattern of the antenna array based on beam weights

Methodology Applied

Scientific EffectRadiation pattern modification:

Data Source

PatentUS10187225B2System and method to enable secondary transmission in the presence of an active primary transmission

Publication Date: 2019.01.22 WILLIAM MARCH RICE UNIVERSITY

AI summary

A method includes generating, by a wireless device, a sounding packet. The method includes sending, by the wireless device, copies of the sounding packet using a beam former and an antenna array to a second wireless device. Each copy of the copies of the sounding packet is sent using different beam weights. The method includes, in response to sending the copies of the sounding packet, obtaining, by the wireless device, a first correction beam weight and a second correction beam weight from the second wireless device and sending, by the wireless device, data to the second wireless device using the first correction beam weight and the second correction beam weight.