Cooperative Spectrum Sharing for Radar-Communication Interference

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Solution Overview

Problem

Current coexistence and cooperative techniques do not optimally mitigate interference between primary and secondary user equipment in transceiver spectrum sharing, particularly for radars and communication systems, necessitating a comprehensive system to optimize spectrum sharing.

Innovation Solution

A cooperative spectrum sharing model that employs spectrum sensing to form a power spectral estimate of the electromagnetic environment, using multi-objective optimization to adjust output power, center frequency, and bandwidth parameters of primary user equipment to maximize range resolution, signal-to-interference-plus-noise ratio (SINR), and channel capacity, while mitigating mutual interference.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If spectrum sensing and multi-objective optimization are implemented to maximize radar performance, then range resolution and SINR are improved, but mutual interference with communication systems increases

Engineering Contradiction:

Improverange resolutionVSAvoidmutual interference

Core Design Contradiction:

Measurement precisionVSObject-affected harmful factors

Solution Approach 1:

The patent dynamically adjusts radar operational parameters (transmit power, pulse width, frequency) based on real-time spectrum sensing results and optimization outcomes, allowing the radar to adapt its parameters to maximize performance while controlling interference to communication systems

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent implements a feedback mechanism where spectrum sensing continuously monitors the electromagnetic environment, multi-objective optimization processes the sensed data, and the optimized parameters are fed back to the radar system to adjust its operation, creating a closed-loop control system that balances radar performance with interference mitigation

Inventive Principle:

Principle #23Feedback

2Productivity

If dynamic spectrum access is used to allow secondary users, then spectrum utilization is improved, but interference mitigation becomes more complex

Engineering Contradiction:

Improvespectrum utilizationVSAvoidinterference mitigation complexity

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

The patent combines spectrum sensing, multi-objective optimization, and parameter adjustment into an integrated system that simultaneously handles multiple functions, reducing overall system complexity while enabling dynamic spectrum access and interference mitigation

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The patent creates a universal spectrum management system that can handle multiple objectives (maximizing range resolution, SINR, and channel capacity) and adapt to different operational scenarios, making the system versatile and reducing the need for separate specialized systems

Inventive Principle:

Principle #6Universality (Multi-functionality)

Data Source

PatentUS11265040B2Method and system for optimizing transceiver spectrum sharing

Publication Date: 2022.03.01 UNITED STATES OF AMERICA THE AS REPRESENTED BY THE SEC OF THE ARMY

AI summary

A method and system for providing a cooperative spectrum sharing model that jointly optimizes primary user equipment parameters for improved frequency agility and performance while mitigating mutual interference between the primary user equipment and secondary user equipment. Spectrum sensing is implemented to form a power spectral estimate of the electromagnetic environment (EME) and apply multi-objective optimization to adjust the operational parameters of the primary user equipment to mitigate interference.