Wireless Communication Codebooks for Near- and Far-Field Precoding

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Solution Overview

Problem

Existing wireless communication systems face limitations in communication flexibility and efficiency, particularly in managing near-field and far-field communication scenarios, with a lack of studies or developments for MIMO precoding under near-field assumptions.

Innovation Solution

The implementation of near-field codebooks and methods for selecting codebooks based on distance thresholds and antenna dimensions, allowing for the selection of appropriate precoders in both near-field and far-field scenarios, enhancing communication flexibility and efficiency.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If a single communication structure is used for all scenarios, then device complexity is reduced, but communication flexibility and efficiency deteriorate

Engineering Contradiction:

Improvecommunication flexibilityVSAvoidcommunication structure complexity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent segments the communication structure into multiple codebooks (first codebook and second codebook) with different structures optimized for different scenarios. The first codebook is designed for near-field communication while the second codebook is designed for far-field communication, allowing the system to adapt to different communication distances without using a single complex unified structure

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent implements dynamic codebook selection based on communication distance. The system determines whether to use the first codebook or second codebook based on whether the communication distance is less than or greater than a threshold, enabling the communication structure to adapt dynamically to different operational conditions and optimize performance accordingly

Inventive Principle:

Principle #15Dynamics

2Productivity

If existing codebooks are used without near-field optimization, then device complexity is maintained, but communication efficiency in near-field scenarios deteriorates

Engineering Contradiction:

Improvecommunication efficiencyVSAvoidcodebook structure complexity

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

The patent applies local quality by creating a specialized first codebook with a specific structure optimized for near-field communication characteristics. This codebook has different properties than the second codebook designed for far-field communication, allowing each codebook to be locally optimized for its specific operational scenario rather than using a generic structure

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The patent changes the structural parameters of the codebooks based on communication distance. The first codebook uses parameters optimized for near-field propagation characteristics while the second codebook uses parameters optimized for far-field characteristics, enabling the system to adapt its communication parameters to match the physical conditions of the communication environment

Inventive Principle:

Principle #35Parameter changes

Data Source

PatentUS20250309948A1Communications network and methods with wireless communication

Publication Date: 2025.10.02 SHARP KK

AI summary

A user equipment (UE) is described. The UE includes transmitting circuitry configured to configure a far-field codebook comprising a plurality of far-field candidate precoders. The transmitting circuitry is further configured to configure a near-field codebook comprising a plurality of near-field candidate precoders. The transmitting circuitry is yet further configured to select a codebook and transmit using the selected codebook.