Quantum Channel Fingerprinting for Massive MIMO Pilot Contamination

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Solution Overview

Problem

Massive MIMO systems face challenges in accurately estimating channel state information due to pilot contamination, which reduces system performance, especially in time-varying channel environments, and existing solutions like orthogonal pilot sequences increase training periods and reduce transmission efficiency.

Innovation Solution

Adopting quantum channel estimation to adaptively describe communication characteristics using quantum channel fingerprints, enabling real-time channel estimation and improving transmission efficiency by determining optimal beam transmission strategies.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If massive MIMO increases the number of antennas to enhance signal beam accuracy and capacity, then transmission efficiency and SNR are improved, but pilot contamination increases due to reused pilot sequences in different cells

Engineering Contradiction:

Improvetransmission efficiencyVSAvoidchannel estimation accuracy

Core Design Contradiction:

ProductivityVSMeasurement precision

Solution Approach 1:

The patent introduces quantum channel estimation as an intermediary mechanism between the physical channel and the signal processing system. Instead of directly using traditional pilot sequences to estimate channel state information, the system uses quantum mechanical principles to model and estimate channel characteristics, thereby avoiding the pilot contamination problem while maintaining accurate channel estimation for massive MIMO systems

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The patent changes the fundamental parameter used for channel estimation from classical pilot sequences to quantum channel fingerprints. This parameter change allows the system to represent channel state information in a quantum state space, enabling more accurate and contamination-free estimation in massive MIMO environments with many antennas

Inventive Principle:

Principle #35Parameter changes

2Measurement precision

If orthogonal pilot sequences are used to avoid pilot contamination, then channel estimation accuracy is improved, but training period increases and transmission efficiency decreases

Engineering Contradiction:

Improvechannel estimation accuracyVSAvoidtraining period

Core Design Contradiction:

Measurement precisionVSLoss of time

Solution Approach 1:

The patent replaces the mechanical/classical pilot sequence system with a quantum mechanical system. Instead of using time-domain pilot sequences that require long training periods, the system uses quantum channel fingerprints that can be obtained through quantum measurements, significantly reducing the training time while maintaining or improving estimation accuracy

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The patent employs periodic quantum measurements to extract channel state information. Rather than requiring continuous or long-duration pilot sequences, the system performs periodic quantum channel estimation, achieving accurate channel characterization with shorter training periods and higher transmission efficiency

Inventive Principle:

Principle #19Periodic action

3Device complexity

If simple linear signal processing is used to eliminate interference in massive MIMO, then processing complexity is reduced, but the system cannot adapt to time-varying channel environments

Engineering Contradiction:

Improvesignal processing complexityVSAvoidadaptability to time-varying channels

Core Design Contradiction:

Device complexityVSAdaptability or versatility

Solution Approach 1:

The patent introduces dynamic quantum channel fingerprinting that adapts to time-varying channel conditions. The quantum measurement and estimation process is performed dynamically based on current channel state, allowing the system to track and adapt to channel changes in real-time, unlike static linear processing methods

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The patent implements feedback mechanisms where quantum channel estimation results are continuously fed back to adjust the signal processing operations. This feedback loop enables the system to adapt to time-varying channels by using the most recent quantum channel fingerprints to optimize transmission parameters, combining simplicity with adaptability

Inventive Principle:

Principle #23Feedback

Data Source

PatentUS12452106B2Communication method based on quantum channel estimation and base station

Publication Date: 2025.10.21 WISTRON CORP

AI summary

A communication method based on quantum channel estimation, including: sampling according to a sampling parameter to obtain an information block, wherein the sampling parameter is used to determine a time distance of a pilot signal; converting the information block into a quantum channel fingerprint; performing channel estimation according to the quantum channel fingerprint to obtain an estimation result; and performing signal transmission according to the estimation result.