Synchronized Jammer State Machines for RF Interference
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Solution Overview
Problem
Existing jamming systems with multiple responsive jammers face limitations in extending their operating area due to interference between jammers, where one jammer may detect a jamming signal from another, leading to unintended reactions.
Innovation Solution
The system employs at least two responsive jammers with synchronized state machines that define detection and jamming phases, including a settable guard time to prevent direct switching between phases and avoid detection of jamming signals from other jammers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If multiple responsive jammers are used to extend the operating area, then the coverage area is improved, but the jammers may detect each other's jamming signals and react incorrectly
Solution Approach 1:
The patent implements periodic action by dividing the operation of each jammer into distinct phases (detection phase and jamming phase) that occur in a repeating cycle. The state machine controls each jammer to alternate between detecting RF signals and transmitting jamming signals, with a guard interval preventing simultaneous operation. This periodic phase structure allows multiple jammers to operate in proximity without interfering with each other, as they are synchronized to be in different phases at any given time.
2Reliability
If a guard interval is introduced between detection and transmission phases, then jammer interference is prevented, but the response time to jam RF signals increases
Solution Approach 1:
The patent applies preliminary action by implementing a guard interval between the detection phase and jamming phase. This guard interval is a predetermined time period that allows the jammer to prepare for transmission and ensures that the RF signal characteristics are stable before jamming begins. By performing this preparatory action in advance, the system prevents interference between multiple jammers while maintaining efficient operation, as the guard interval is optimized to be the minimum necessary time rather than an excessive delay.
Data Source
Figure 1~2
AI summary
The invention relates to a jamming system with at least two responsive jammers (12, 14). Each responsive jammer (12, 14) comprises a detector (18) and an exciter (20). The respective detector (18) is configured to receive a radio frequency signal. The respective exciter (20) is configured to generate a jamming signal that disturbs the radio frequency signal received. Each of the responsive jammers (12, 14) comprises a state machine (22) that is configured to define a detection phase and a jamming phase of the respective responsive jammer (12, 14). The state machines (22) of the responsive jammers (12, 14) are synchronized with each other. Further, a method of operating a jamming system (10) is described.