Radar-Communication Interference Mitigation via Waveform Prediction

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Solution Overview

Problem

Current spectrum sharing technologies in CBRS-GAA spectrum are not in a coexistence mode, leading to interference between radar signals and wireless communication signals, which results in service disruptions and inefficient use of spectrum.

Innovation Solution

A system and method for mitigating interference between radar and wireless communication signals by detecting radar signals, predicting potential waveforms, performing waveform matching, and dynamically adjusting parameters to minimize interference, enabling simultaneous transmission of both signal types.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If radar signals and wireless communication signals share CBRS-GAA spectrum in non-coexistence mode, then spectrum access is simplified, but interference occurs and service reliability deteriorates

Engineering Contradiction:

Improvespectrum accessVSAvoidservice reliability

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The system dynamically adjusts wireless communication parameters (such as transmission power, time slots, and frequency allocation) based on real-time radar signal detection. The network controller continuously monitors radar activity and modifies communication operations to avoid interference, enabling both spectrum sharing and service reliability through adaptive management

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The system implements a feedback mechanism where radar signal information is detected and fed back to the network controller, which then adjusts wireless communication parameters accordingly. This closed-loop control ensures that communication services maintain reliability while sharing spectrum with radar systems

Inventive Principle:

Principle #23Feedback

2Reliability

If wireless communication network shuts off transmission when radar is detected, then radar interference is avoided, but productivity and spectrum efficiency deteriorate

Engineering Contradiction:

Improveradar signal integrityVSAvoidcommunication service continuity

Core Design Contradiction:

ReliabilityVSProductivity

Solution Approach 1:

Instead of completely shutting off transmission, the system applies partial mitigation measures such as reducing transmission power, using time-division multiplexing, or allocating specific frequency bands exclusively to radar. This partial action maintains communication service continuity while ensuring radar signal integrity

Inventive Principle:

Principle #16Partial or excessive action

Solution Approach 2:

The system performs preliminary detection of radar signals and takes preventive actions before interference occurs. By monitoring radar activity in advance and pre-adjusting communication parameters, the system avoids interference without disrupting ongoing communication services

Inventive Principle:

Principle #10Preliminary action

3Device complexity

If spectrum sharing is implemented without coexistence mode, then device complexity is reduced, but interference mitigation capability deteriorates

Engineering Contradiction:

Improvespectrum sharing mechanismVSAvoidsignal interference

Core Design Contradiction:

Device complexityVSObject-affected harmful factors

Solution Approach 1:

The system introduces an intermediary management layer (network controller) that mediates between radar and wireless communication systems. This intermediary coordinates spectrum access, detects radar signals, and adjusts communication parameters to minimize interference, adding complexity only at the management level rather than at the physical transmission level

Inventive Principle:

Principle #24Intermediary (Mediator)

Data Source

PatentUS20250123354A1Method and system for interference mitigation of signals

Publication Date: 2025.04.17 SHARMA AYAN

AI summary

The present invention discloses a method and system of mitigating interference between radar signals and wireless communication signal. The system comprises a wireless communication networks, a distributed radar sensor, a receiver chain, a processing unit, and an interference mitigation unit. The distributed radar sensors are configured to detect radar signals transmitted from a radar communication network. The processing unit is configured to extract a first parameter related to one or more radar signals, predicting a potential radar waveform of radar signals based on the first parameter, perform waveform matching between the potential radar waveform and the wireless communication signal, and determine a probability of interference between the radar signals and the wireless communication signals. The interference mitigation unit is configured to perform interference mitigation between the radar signals and the wireless communication signals.