Digital Polarization Reconfiguration for Depolarized Wireless Links

Solution Overview

Problem

The depolarization effect in wireless communications causes polarization mismatch between transmit and receive ends, leading to reduced signal-to-noise ratio and reception efficiency due to scattering, refraction, and diffraction in complex space environments.

Innovation Solution

A polarization reconfigurable apparatus and method that includes a signal generation unit, signal adjustment unit, and digital-to-analog conversion unit, capable of determining and adjusting the polarization mode of signals to match the receive end, using dual-polarized antennas in a uniformly spaced linear array to control beam direction and amplitude and phase of signals, thereby pre-compensating for depolarization effects.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Device complexity

If polarization reconfiguration is performed in analog domain, then device complexity is reduced, but polarization reconfiguration precision and flexibility deteriorate

Engineering Contradiction:

Improvedevice complexityVSAvoidpolarization reconfiguration precision

Core Design Contradiction:

Device complexityVSMeasurement precision

Solution Approach 1:

The patent replaces the mechanical/analog signal adjustment system with a digital signal processing system. Specifically, it uses digital signal generation, digital signal adjustment, and digital-to-analog conversion to achieve polarization reconfiguration, substituting direct analog manipulation with digital domain processing that offers higher precision and flexibility while maintaining manageable device complexity through integrated processing units.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

2Device complexity

If polarization reconfiguration is performed in analog domain, then device complexity is reduced, but polarization reconfiguration flexibility deteriorates

Engineering Contradiction:

Improvedevice complexityVSAvoidpolarization reconfiguration flexibility

Core Design Contradiction:

Device complexityVSAdaptability or versatility

Solution Approach 1:

The patent replaces the mechanical/analog signal adjustment system with a digital signal processing system. Specifically, it uses digital signal generation, digital signal adjustment, and digital-to-analog conversion to achieve polarization reconfiguration, substituting direct analog manipulation with digital domain processing that offers higher precision and flexibility while maintaining manageable device complexity through integrated processing units.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

3Ease of operation

If polarization modes are not matched, then transmission simplicity is maintained, but signal reception efficiency deteriorates

Engineering Contradiction:

Improvetransmission simplicityVSAvoidsignal reception efficiency

Core Design Contradiction:

Ease of operationVSProductivity

Solution Approach 1:

The patent applies preliminary action by determining the polarization mode of the to-be-transmitted signal in advance and pre-adjusting the polarization of transmitted signals through digital signal processing before transmission. This preliminary polarization matching ensures that when signals reach the receive end, their polarization modes are already aligned, eliminating the need for complex real-time adjustments and maximizing signal reception efficiency from the outset.

Inventive Principle:

Principle #10Preliminary action

Data Source

PatentUS11757520B2Polarization reconfigurable apparatus, communications device, and polarization reconfiguration method

Publication Date: 2023.09.12 HUAWEI TECH CO LTD

AI summary

A polarization reconfigurable apparatus, a communications device, and a polarization reconfiguration method, the apparatus including a signal generation unit, a signal adjustment unit, a digital-to-analog conversion unit, and a transmission unit that are sequentially connected. A signal transmitted by a first port in the transmission unit is orthogonal to a signal transmitted by a second port in the transmission unit. The signal generation unit is configured to generate a first signal. The signal adjustment unit is configured to determine a polarization mode of a to-be-transmitted signal, divide the first signal into two first signals, and adjust an amplitude and a phase of a 1st first signal and an amplitude and a phase of a 2nd first signal based on the determined polarization mode.