Radio Channel Estimation via Power Delay Profile Interference Cancellation

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Solution Overview

Problem

Existing radio communication technologies face challenges in accurately estimating wireless channels due to contamination of reference signals, known as pilot contamination or reference signal contamination, which degrades channel estimate accuracy and communication reliability.

Innovation Solution

The proposed solution involves a processor configured to estimate a power delay profile (PDP) of a channel estimate, using a PDP estimator that can perform interference cancellation techniques to improve channel estimation accuracy. This includes using artificial neural networks to map channel estimates to PDP values and applying interference cancellation methods such as time domain and frequency domain interference cancellation.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If reference signals are used for channel estimation in radio communication networks, then channel quality information can be obtained, but pilot contamination occurs which degrades channel estimate accuracy

Engineering Contradiction:

Improvechannel estimate accuracyVSAvoidpilot contamination

Core Design Contradiction:

Measurement precisionVSObject-affected harmful factors

Solution Approach 1:

The patent extracts and removes the harmful interference component from the received reference signal. By estimating the interference signal separately and subtracting it from the total received signal, the method isolates the desired channel information from the contaminating pilot signals, thereby resolving the pilot contamination problem while maintaining accurate channel estimation.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The patent converts the harmful interference from contaminating reference signals into useful information. By treating the interference as a measurable quantity and using it to estimate and cancel the contamination effect, the method transforms the previously harmful factor into a tool for improving channel estimation accuracy.

Inventive Principle:

Principle #22Blessing in disguise (Convert harm into benefit)

2Productivity

If more users share the same radio communication resources, then resource utilization efficiency increases, but channel estimate accuracy degrades due to increased interference

Engineering Contradiction:

Improveresource utilization efficiencyVSAvoidchannel estimate accuracy

Core Design Contradiction:

ProductivityVSMeasurement precision

Solution Approach 1:

The patent converts the harmful interference caused by multiple users sharing resources into useful information for channel estimation. By measuring and utilizing the interference characteristics, the system can cancel out the contamination effects, allowing accurate channel estimation to be maintained even when many users share the same time-frequency resources.

Inventive Principle:

Principle #22Blessing in disguise (Convert harm into benefit)

Solution Approach 2:

The patent employs feedback mechanisms where channel estimates are continuously refined based on received signals and interference measurements. This feedback loop allows the system to adapt to changing interference conditions dynamically, maintaining accurate channel estimation as more users share the radio resources.

Inventive Principle:

Principle #23Feedback

Data Source

PatentUS20250105962A1Methods and devices to perform radio communication using channel estimates

Publication Date: 2025.03.27 INTEL CORP

AI summary

A radio communication device may include a memory; and a processor configured to: perform a plurality of channel estimations based on a received radio signal comprising a plurality of reference signals of a plurality of mobile radio communication devices, wherein each channel estimation of the plurality of channel estimations is for a respective mobile radio communication device of the plurality of communication devices; determine a residual signal for the plurality of mobile radio communication devices based on the plurality of channel estimations; and estimate channel information for at least one mobile radio communication device from the plurality of radio communication device based on the residual signal and an estimated power delay profile.