Airborne Jamming Transmitter Synchronization Protocol

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Solution Overview

Problem

Existing communications systems face challenges in maintaining effective jamming of target signals while preventing interference with friendly transceivers, particularly due to the 'co-site problem' where large transmitters emit spurious emissions that can interfere with nearby receivers, limiting the effectiveness of jamming operations.

Innovation Solution

A jamming protocol with coordinated or synchronized silent periods allows friendly transceivers to communicate by ceasing jamming signals at predetermined times, enabling information exchange without disrupting the jamming process, using a synchronization protocol to ensure synchronized cessation and resumption of jamming signals, and varying frequencies to avoid spurious emissions.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If transmitters continuously transmit jamming signals to maintain effective jamming of target receiver, then jamming effectiveness is improved, but friendly transceivers cannot communicate due to interference from jamming signals and spurious emissions

Engineering Contradiction:

Improvejamming effectivenessVSAvoidfriendly communication capability

Core Design Contradiction:

ReliabilityVSEase of operation

Solution Approach 1:

The patent implements periodic jamming where transmitters alternate between jamming phases and communication phases. During communication phases, jamming signals are suspended to allow friendly transceivers to exchange information, while during jamming phases, full jamming effectiveness is restored. This periodic switching resolves the contradiction by separating the two conflicting functions in time.

Inventive Principle:

Principle #19Periodic action

Solution Approach 2:

The system dynamically adjusts the jamming signal state based on operational requirements. Transmitters can switch between transmitting jamming signals and suspending transmission depending on whether communication or jamming is the priority at any given moment. This dynamic control allows the system to adapt to changing operational needs and resolve the contradiction between continuous jamming and periodic communication.

Inventive Principle:

Principle #15Dynamics

2Adaptability or versatility

If transmitters are located close to receivers to enable coordinated jamming operations, then coordination effectiveness is improved, but spurious emissions from transmitters interfere with receiver operations (co-site problem)

Engineering Contradiction:

Improvecoordination capabilityVSAvoidspurious emission interference

Core Design Contradiction:

Adaptability or versatilityVSObject-affected harmful factors

Solution Approach 1:

The patent applies periodic suspension of jamming signals during communication phases, which allows receivers to operate without interference from spurious emissions at those specific times. This temporal separation enables close proximity deployment of transmitters and receivers while avoiding the co-site problem during critical communication windows.

Inventive Principle:

Principle #19Periodic action

Solution Approach 2:

The system extracts or removes the jamming signal transmission during communication phases, effectively taking out the harmful spurious emissions from the system at specific times. This allows the receiver to operate without interference while maintaining the ability to resume jamming when communication is complete.

Inventive Principle:

Principle #2Taking out (Extraction)

3Ease of operation

If transmitters suspend jamming signals to allow friendly communication, then communication capability is improved, but jamming effectiveness is reduced during communication windows

Engineering Contradiction:

Improvefriendly communication capabilityVSAvoidjamming effectiveness

Core Design Contradiction:

Ease of operationVSReliability

Solution Approach 1:

The patent implements periodic jamming with scheduled suspension during communication phases and resumption during jamming phases. This creates a rhythm where jamming effectiveness is temporarily reduced only during necessary communication windows, while being fully restored at other times, thus balancing both requirements.

Inventive Principle:

Principle #19Periodic action

Solution Approach 2:

The system applies partial jamming suspension - only during specific communication phases rather than continuous suspension. This partial action allows communication to occur while minimizing the impact on overall jamming effectiveness, as jamming is maintained during all non-communication phases.

Inventive Principle:

Principle #16Partial or excessive action

Data Source

PatentUS7826839B1Communication system to facilitate airborne electronic attack

Publication Date: 2010.11.02 ROCKWELL COLLINS INC

AI summary

A method of disrupting communications reception of a target radio receiver. A plurality of transmitters transmit a noise signal toward the target radio transceiver. Each of the plurality of transmitters has a receiver associated therewith A first transmitter ceases transmitting a noise signal at a pre-determined time. A receiver associated with the first transmitter receives information from another of the plurality of transmitters when the first transmitter has ceased transmitting the noise signal. The first transmitter resumes the transmission of the noise signal after the information has been transmitted.