Asymmetric Beam Pattern Table for Wireless Communication

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Solution Overview

Problem

Conventional wireless communication devices using the IEEE 802.11ad standard suffer from a difference in wireless signal quality due to the use of uniform angular intervals in beam patterns, which leads to gain deterioration between beams, particularly on the transmitting side.

Innovation Solution

A wireless communication device with a look-up table that stores a beam pattern table with more antenna weight vectors for transmission than reception, allowing for a narrower angular interval between adjacent beams, thereby improving communication quality by reducing gain deterioration in the valleys between beams.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If a standard beam table with uniform angular intervals is used for beam patterns, then the device complexity is reduced and ease of operation is improved, but the wireless signal quality deteriorates due to gain loss in valley regions between beams

Engineering Contradiction:

Improveease of operationVSAvoidwireless signal quality

Core Design Contradiction:

Ease of operationVSReliability

Solution Approach 1:

The patent applies local quality by differentiating the beam pattern requirements between transmission and reception sides. The transmission beam pattern table uses a smaller angular interval (higher density of beam patterns) compared to the reception side, optimizing signal quality specifically where needed (in transmission valleys) without uniformly increasing complexity throughout the entire system.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The patent changes the angular interval parameter differently for transmission and reception beam patterns. By adjusting the angular interval parameter to be smaller for transmission beams, the system reduces gain deterioration in valley regions while maintaining reasonable system complexity through asymmetric parameter configuration.

Inventive Principle:

Principle #35Parameter changes

2Reliability

If the angular interval between adjacent beams is reduced to improve signal quality in valley regions, then the wireless signal quality is improved, but the device complexity increases due to more beam patterns required

Engineering Contradiction:

Improvewireless signal qualityVSAvoiddevice complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The patent applies partial action by implementing the reduced angular interval only for the transmission beam pattern table, not for the reception side. This partial application of the solution reduces complexity increase while still achieving the primary goal of improving signal quality in valley regions where communication partners may exist.

Inventive Principle:

Principle #16Partial or excessive action

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

This configuration enhances communication quality by narrowing the angular interval between beams on the transmitting side, improving signal quality when a communication partner is in the direction of a valley between beams compared to conventional methods.

Implementation Method 1

at least one beamforming antenna transmitting or receiving a radio signal with a beam pattern specified by a set of antenna weight vectors selected from the beam pattern table

Methodology Applied

Scientific EffectBeamforming:

Data Source

PatentUS10944456B1Wireless communication device

Publication Date: 2021.03.09 FUJIKURA LTD

AI summary

A wireless communication device includes a look-up table that stores a beam pattern table, and at least one beamforming antenna transmitting or receiving a radio signal with a beam pattern specified by a set of antenna weight vectors selected from the beam pattern table, where a number of antenna weight vectors for obtaining a beam pattern with a narrow half power beam width for transmission included in the beam pattern table is larger than a number of antenna weight vectors for obtaining a beam pattern with a narrow half power beam width for reception.